You can immediately start with the measurements. If you were using hormonal birth control before, stop using it before you begin measuring. The first bleeding after coming off hormonal birth control is a withdrawal bleeding and must not be entered as your period. If you are menstruating when starting with Daysy and you cannot enter all days, do not enter the current menstruation, but the next one. The first day of menstruation is important because it marks the beginning of your cycle.
Below the tongue in the pocket next to your frenulum and with your mouth closed. It is best to measure on the same side each morning if comfortable.
Yes, you can. Daysy is also reliable during the transition to menopause. If your ovulation is delayed or doesn't occur, Daysy will display more red and yellow days. Using Daysy will allow you to directly observe the changes that are happening to your cycle.
Yes, Daysy can be used while breastfeeding. You should not start measuring until 6 weeks after birth. Since there is no way to predict the first ovulation after birth, Daysy will stay yellow until the first menstruation is entered postpartum. Once you enter your first period, Daysy will display fewer red and yellow days in the following 2-4 cycles as Daysy gets to know your unique cycle rhythm.
Daysy 1.0: If you traveled overnight, skip the first measurement after your arrival and continue to measure regularly the next day after resuming a normal sleep cycle. Do the same thing when you return home from traveling.
Daysy 2.0: When traveling with your Daysy, it is important to set the time on your Daysy to the local time before resuming your temperature readings. Set your mobile phone to the local time zone (many phones will do this automatically) and synchronize your Daysy with DaysyView/DaysyDay to set the time on Daysy. Take your temperature and resume use as normal the next morning.
Yes, you can always rely on Daysy. Be sure to use Daysy daily right after you wake up, before you get up and get active. For optimal use of Daysy, we recommend that you have at least 1 hour of continuous sleep before measurement. If you have to skip a measurement after a sleepless night, Daysy will still reliably display your fertility status. Depending on where you are in your cycle, Daysy will react accordingly.
It will take approximately 60 seconds to measure.
Daysy automatically switches off after 60 seconds or after syncing with the DaysyDay app.
No. Daysy only records the first daily measurement. If you have concerns about a reading, please contact our customer service team.
No. You should have at least one hour of good quality sleep before the measurement. It is important that you take your temperature immediately after waking up, before getting up and becoming active. For optimal use of Daysy, try to get at least 3 or more hours of sleep before measuring. Less sleep can result in more temperature fluctuations causing Daysy to give more fertile or potentially fertile days.
When Daysy displays a red light, it means that you are fertile. You can check your status anytime by activating Daysy.
Yes. Daysy has been designed for women like you. Be sure to use Daysy daily right after you wake up, before you get up and get active. For optimal use of Daysy, we recommend that you have at least 1 hour of continuous sleep before measurement.
Daysy 1.0: Daysy only registers one measurement after 18 hours have passed since your last reading.
Daysy 2.0: Daysy only registers one measurement per day. If the next day has not yet started, a tone (beep-beep) will sound.
Yes, but be sure to use Daysy daily right after you wake up, before you get up and get active. For optimal use of Daysy, we recommend that you have at least 1 hour of continuous sleep before measurement. Daysy can handle skipped measurements from time to time.
Yes, please take your temperature throughout your entire menstrual cycle. However, on some days you should refrain from taking a measurement: for example, after excessive alcohol consumption, when you are ill (fever) or when you are feeling very bad.
You can confirm or remove menstruation at any time during the current day. Simply press the button to turn on your Daysy, and then press and hold the activation button until the violet light lights up without flashing and you hear a "beep." Confirm you are menstruating for each day of active bleeding and for a minimum of three consecutive days. You can also remove menstruation data for the same day by turning Daysy on and pressing and holding the activation button until the purple/blue light is no longer solidly lit and begins flashing again.
One or two skipped measurements are not a problem; Daysy will simply use your earlier data to calculate your fertility. Multiple missing values per cycle will lead to a higher number of red or yellow days.
Simply press the activation button and your fertility status will be displayed.
No. Daysy will only record the first measurement of the day.
Please contact your customer service for guidance.
For optimal use of Daysy, we recommend that you should have slept sufficiently (at least one hour) before the measurement. It is important that you take your temperature immediately after waking up, before getting up and becoming active. Measure below your tongue, with your mouth closed, and keep the device steady while it is measuring. Video Tutorial
Our devices expect a certain amount of normal irregularity. Cycle lengths of 19-40 days are the ideal requirement. The statistics display the ovulation range. If your ovulation fluctuates by more than 4 days or if your cycle length lies outside the 19 - 40 day range, please contact our team of experts.
It is normal for cycles to fluctuate. If you're unsure, feel free to contact our customer service.
Certain "strict" diets can lead to cycle irregularities, often times causing your period to come later. If you're unsure, reach out to our support team.
Yes. Irregular cycles are not a problem for Daysy/Lady-Comp. Even with irregular cycles, all Valley devices distinguish between non-fertile and fertile days with a very high accuracy. However, in case of extreme fluctuations between cycles it will give you more red and yellow lights and less green lights. Fluctuations of several days are usually not a problem. If you have questions about your unique cycle, please reach out to our team of experts.
No, over-the-counter pain medication will not influence the measurements. The common additional antifebrile effect does not influence the basal temperature. However, please do not temp if you're using these medications to control a fever. If you're unsure, please contact our customer service.
Only very few (hormone-free) medications have a direct influence on your measurements, but often the reason why you are taking medication can influence your temperature (e.g. fever or stress). Hormonal medication will influence your temperature and should under no circumstances be taken in combination with Daysy or Lady-Comp. If you're unsure, consult with your doctor or contact our customer service.
● excessive amounts of alcohol
● sleep deprivation
● disease or illness
● chronic physical or emotional stress
● significant exercise
● strict dietary restrictions / starvation
● malnutrition
● travel
Once you know the cause, many irregularities in your cycle are easy to reverse. Feel free to reach out to our customer service to discuss your temperature curve.
If your efforts to become pregnant have not been successful within six to twelve months, consult your physician.
Below the tongue in the pocket next to your frenulum and with your mouth closed. It is best to measure on the same side each morning if comfortable.
Yes. If you sleep with your mouth open, just close it once and swallow before you measure. The measurement is finished when the temperature has reached its final value and you hear a soft beep beep from Daysy. Daysy may take a couple of seconds longer to measure for those users who sleep with their mouths open. Please be sure not to open your mouth while measuring.
No, your data will not automatically transfer from the app to your new Daysy. Please get in touch with customer support prior to purchasing a Daysy 2.0 if you’d like to have your data transferred.
To avoid damage, please do not place Daysy under your pillow. Keep Daysy in a safe place within easy reach.
No, Daysy is your individual fertility tracker with your individual data.
Daysy is programmed with a complex algorithm which evaluates your cycle by tracking your morning temperature (taken under the tongue) and knowing when you have your period. Daysy will then show you right away if you are currently fertile or not.
Yes, your initial Daysy order includes everything you need.
That depends on whether the medication influences your body temperature or your cycle. In general, you should skip measurements while you are taking such medication. If you have doubts, contact your doctor or our customer service team.
In general, you should skip measurements during illness and while you are taking medication that can have an influence on your body temperature or cycle. If you have doubts, contact your doctor or our customer service team.
The first 2-4 cycles of use are considered Daysy's learning phase. Over the course of her learning phase, Daysy will come to understand your cycle and begin narrowing down your fertile window. Daysy remains quite cautious and conservative during this time, which is why Daysy is accurate starting the very first day.
Based on its recorded data, Daysy can compensate for the occasional missed reading. We still recommend you measure as regularly as possible so that your fertile phase can be narrowed down as precisely as possible. If you have to skip measurements due to illness, Daysy will get back on track once you start again.
You can rely on Daysy's results starting the very first day of use. In the beginning, you will see more yellow and red days because Daysy is still learning your unique cycle. You will see more green days as Daysy comes to understand your cycle and can narrow down your fertile window. The more regularly you measure, the better.
Smoking does not influence the result. Alcohol, if consumed excessively or when your body is not used to it, does influence basal body temperature. If you can feel that you were drinking yesterday, you should skip your reading in the morning. If you feel just fine and have no headache or other symptoms of alcohol consumption, you are fine to temp as usual.
Daysy has a 2-year manufacturer's warranty. All information can be found in the terms and conditions.
Ideally, you measure daily. The fewer measurements you miss, the better.
A fever is when your body temperature reaches at least 38°C (100.4°F) degrees - if this is the case, you will most likely feel ill and you will notice that your temperature curve is unusually high (see example curve). The DaysyDay app will alert you that your temperature is high and recommend you temp with a standard medical thermometer. Temperatures above 37.8°C (100.4°F) or below 35°C (95°F) degrees are automatically excluded from the algorithm and will not be used for your fertility calculations.
Red = fertile / possibly fertile (On red days you can plan for a pregnancy.)
Red flashing = predicted day of ovulation
Green = infertile days (You are not fertile on green days.)
Yellow = learning phase/cycle fluctuation (Yellow days should be considered as red days.)
Red, green, yellow (blinking) = possible pregnancy
If you feel that there is something not right, you feel sick, or you have pain, never hesitate to consult your doctor! Most people tolerate vaccinations without any problems. Sometimes, however, vaccination reactions occur: These are almost always harmless after-effects of vaccinations, which in the vast majority of cases pass very quickly. Some vaccinated people react with a slight fever (below 39°C / 102°F), aching limbs or faintness. The fever can occur only a few hours after vaccination and last up to 3 days. Such vaccination reactions are usually completely harmless and no cause for concern. As a rule of thumb: If you wake up in the morning after the vaccination and feel different than usual, for example sick or overtired, then interrupt the measurements until you feel better again.
Daysy 1.0: Remove the battery and store Daysy in a dry location in its original packaging, if available. You can find more information in the instruction manual or contact customer support.
Daysy 2.0: Please store it in a cool, dry location. While stored, please remember to charge your Daysy once every 2-3 months to maintain the internal battery. For further questions contact customer support.
No. Daysy records all your data and keeps it safe. If you have synchronized Daysy with DaysyView/DaysyDay, you can also store your data online to keep it safe in case Daysy gets lost or stolen. If that happens, please contact customer service.
No, since you measure below the tongue, these factors have no influence on the measurement.
If for some reason, the increase in temperature is very low, Daysy will switch to displaying red days for a longer period, before switching to yellow days and, eventually, back to green days. A low rise in temperature can be an indication of a hormonal condition. During anovulatory cycles, no rise in temperature is registered because ovulation did not occur. Corpus luteum insufficiency (CLI) is another possible reason for a low or indeterminable rise in temperature because the body doesn't produce sufficient progesterone to make the basal body temperature (BBT) rise. Menopausal women can also register lower increases in temperature, because their estradiol and progesterone values are declining.
Not really. On average, a woman's temperature increases by 0.3 degrees Celsius. If yours rises by more than 0.5 degrees Celsius on average, please contact our customer service.
Not at this time. Daysy can only be connected to the DaysyDay app to view the data.
You can resume normal use of the device but may see additional yellow and red days for the first few cycles. Daysy will get back on track in no time!
Daysy 1.0: Remove the battery and store Daysy in a dry location in its original packaging, if available. You can find more information in the instruction manual.
Daysy 2.0: Please store it in a cool, dry location. While stored, please remember to charge your Daysy once every 2-3 months to maintain the internal battery.
No! DaysyDay is free! There are no in-app purchases or upgrade fees.
The DaysyDay app cannot be used without the device, but Daysy can be used as a standalone device by following your indicators directly on the device. The app is just a way to view the data. The app is an extended display and allows you to have a deeper insight into your cycle data. However, the app does not calculate or evaluate any of the data.
The intended use statement for your app can be found in the Main Menu of the app under Info - DaysyDay Information.
The serial number of your app (sometimes referred to as the version number) can be found in Settings > Info > DaysyDay Information. This number may be asked for by customer support when assisting with app related concerns.
These horizontal lines run through your average low and high temperatures of each cycle, calculated once the cycle has closed. Because basal body temperature values naturally fluctuate each day, these lines can help you visualize the temperature step that occurs after ovulation. To learn more about how Daysy identifies and uses this temperature step to calculate your daily fertility, please read the article The Fertility Tracker Method.
Android phones require the app to have access to the phone's location data in order to enable Bluetooth® communication. Please rest assured that this is strictly an Android requirement. The DaysyDay app and Valley Electronics are not collecting, storing, or accessing any location information. This is strictly to allow the app to communicate with your Daysy via Bluetooth®.
No. DaysyDay will only import data from Daysy or the additional tracking information you have manually entered.
When you synchronize Daysy with DaysyDay, all data on Daysy is transmitted. You can also manually add period flow, cervical mucus, intercourse, and other personal tracking information.
Open the app and click on the "Connect your Daysy" button. Select the appropriate button for the model Daysy you have, Bluetooth® or Cable, and then follow the on-screen instructions to connect your Daysy.
For Daysy 1.0 (Cable), connect the cable to Daysy and then to your phone and then turn Daysy on. Occasionally, disconnecting and reconnecting the cable may be necessary if the phone does not recognize that Daysy is connected. Please note: Most modern phone OS systems do not support the data transfer method the Daysy 1.0 uses. Please contact support for additional assistance.
For Daysy 2.0 (Bluetooth), press the button on Daysy once to turn it on and then double press the button to activate Bluetooth mode. Make sure Bluetooth® is activated on your phone and the app has permission to access the Bluetooth®. You will see a synchronization animation and then you will be prompted to enter your email address and the pin code you receive via email. Once completed, you will see your data displayed on the calendar and temperature curve.
Yes, absolutely. Your fertility data is always safely stored on your Daysy and other information, such as notes, intercourse, and cervical mucus, is stored to your profile on our private and secure server. When you receive your new phone, simply install the DaysyDay app from the App Store or Play Store and then synchronize your Daysy. Log in with the same email address you used to create your profile in the app on your old phone, confirm your personal data, and then you will see all of your information again.
DaysyDay Partner requires internet access so that the app can display the most current data retrieved from the server after the Daysy user's most recent synchronization. This is also required in case permission levels have changed and access to certain data has been granted or removed.
"DaysyDay" is an app available for free download in your app store. When used and synchronized with Daysy, the app displays your past, current, and future fertility statuses and provides additional insights to help you learn more about your cycle.
Daysy's internal clock is automatically set when you synchronize with the DaysyDay app on your phone. Once the time updates on your phone after traveling, or after the seasonal time change, synchronize your Daysy to update Daysy's clock as well. Please note that any temperature measurements recorded between the time change and the first synchronization in the new "time zone" will still be displayed with the old time stamp. The displayed measurement time does not have an effect on your cycle calculations.
Daysy 2.0: The blue light on your Daysy's activation ring will move from the bottom upward while charging. All of the blue lights will light up once the battery is fully charged. Daysy may enter standby mode while charging. Simply press the button to check the charging status.
Daysy 2.0: Before you contact our support team please try to charge Daysy with the USB cable at the USB port of your PC or phone charger over night. While Daysy is connected to the power supply, push the button once. Check if the charging indicators show up (rising if charging, full ring if charging complete). If yes, wait till the charging is completed and remove the USB cable. If Daysy still does not wake up again, please contact our support team for further instructions.
Daysy 2.0: The "beep-beep" sound is Daysy's way of indicating that temperature reading has already been recorded for this day. Please wait and take your temperature tomorrow morning. A temperature reading can only be recorded once a day.
Daysy 2.0: Please contact your local customer support team.
Daysy 1.0: The battery life of the battery we supply with your order is about 2 years. Daysy's activation ring will signal a weak battery with rapid blinking. Please exchange the battery within 2 days as instructed in the manual.
Daysy 2.0: A single battery charge will last 1 to 2 months, depending on how often you use your Daysy. To indicate that the battery is nearly empty, the activation ring on your Daysy will flash at frequent intervals. Make sure you charge the battery within a week.
If Daysy finishes a measurement by vibrating, repeat the measurement. Make sure to hold Daysy still and your mouth closed while you take your temperature. Please note the cable cannot be inserted into Daysy while recording a reading.
Daysy 1.0: Daysy uses a CR2032 battery which can be purchased anywhere standard batteries are sold.
Daysy 2.0: Daysy now has an internal battery that charges by connection to a power source using a microUSB cable which is included with your Daysy.
Use a damp cloth to carefully clean the sensor on your Daysy. You can also use a little alcohol or soap if you wish. Since your Daysy is not waterproof, make sure that only the neck on the sensor and not the whole appliance comes into contact with water.
We recommend the following steps for cleaning your Daysy:
• Regularly clean the sensor tip with water and/or some mild soap after use.
• Dry with a clean, soft cloth.
• Replace the protective cap after drying.
These steps will reduce the number of germs or possible viruses on the surface of the device. This cleaning is sufficient for daily personal use with Daysy.
If the device needs to be disinfected as well, the following steps can be practiced:
• Wash your hands thoroughly or wear disposable gloves.
• Clean the sensor neck and tip (as per steps 1 & 2 listed above).
• Moisten the sensor neck and tip with a disinfectant (limited virucidal), alcohol (60-80%) or isopropanol 70%.
• When necessary, a cotton swab can be moistened with disinfectant and inserted into the protective cap to clean the inside.
• Allow to air-dry (the sensor neck should not touch any other objects or surfaces).
• Place the protective cap back on your Daysy.
Daysy 1.0: The battery should not be removed for any reason. If Daysy's battery loses contact, it will stay yellow until the next menstruation is entered. The data you have already saved within Daysy is still there.
Daysy 2.0: Daysy does not have an accessible battery compartment. Please do not attempt to open your device or remove the battery as this will automatically void the warranty.
Please contact customer service.
Please contact your local customer service.
Daysy 1.0: Make sure that you are following the correct order of steps to facilitate synchronization. Please contact your local customer service team if you have further trouble.
Daysy 2.0: Please make sure that Bluetooth® is enabled on your device and on your Daysy. To enable Bluetooth® on your Daysy, wake Daysy up and press the activation button twice (blue light blinking). Now select the Sync button in the top right corner of the app to start the synchronization process. Daysy is communicating with the app when the blue light remains illuminated. If the blue light on Daysy keeps blinking, please check the Bluetooth® mode on your phone again. If you have further trouble, please contact your customer support team.
Please contact your local customer service to discuss next steps.
If no replacement parts are shown in your shop, please contact your local distributor.
Please make sure you are not activating the Bluetooth mode on your Daysy until after you press Start on the app. Waiting until you get to the instruction screen that tells you to activate Bluetooth mode on Daysy should enable a good connection.
Your Daysy has been successfully updated. You can confirm this by choosing "Check for updates" from the settings menu.
No. The current update is to improve the Bluetooth communication pathway on your Daysy, which is separate from where your data is stored on the device. However, a current synchronization is required before performing the update so there is also a backup of your complete data file on our secure server as an extra safety precaution.
Every now and then personal electronics need to be updated, and Daysy is no different. The current update is to improve the data handling of large files and the Bluetooth communication pathway. Please update as soon as possible when you receive an update notification to avoid any interruptions in use.
The update is only available for Daysys with certain Bluetooth modules. If you are having trouble synchronizing, please contact your local support team.
The update is only available for Daysys with certain Bluetooth modules. If you are having trouble synchronizing, please contact your local support team.
Currently, the update is only available through the app.
Updates to your Daysy are rare. However, as technologies continue to improve, if there are updates that can be made to the existing hardware to improve usability of your device, we will make these available.
Updates are mandatory and typically occur once a year. You will be informed about the update through the app. As phone and app technologies continue to evolve, these updates are essential to ensure smooth synchronization and optimal performance.
The update to your Daysy was not successful. Press the button on Daysy one time to remove the incomplete update. Your Daysy will still function as normal. When you are ready, you can try the update again by choosing "Check for updates" from the settings menu.
Please open your DaysyDay app to the Settings Menu and then choose Account. Now scroll down and click on the Check for Update button. You will then see a series of on-screen instructions to guide you through the update process.
DaysyDay: After resetting your Daysy, please open DaysyDay and open the "Settings" menu. Select "Unpair Daysy" under "Profile" on the "Account" page. Click the "Unpair Daysy" button and then "Unpair" on the next screen to complete the process. This will erase all data from your app so that only the new data is seen when you sync again.
All three devices place great importance on data privacy. Your personal cycle data is stored locally on the device and is only transmitted in anonymized form if you use additional features such as cloud backups or apps. Daysy and Teena use modern encryption technologies to protect your information. Lady-Comp does not have an app; the data stays on the device.
Are my cycle data uploaded to the cloud?
- Daysy: Cycle data is stored locally on the device by default. An optional app allows encrypted cloud backups.
- Lady-Comp: Stores data on the device.
- Teena: Usually uses app integration, where data is transmitted encrypted.
Who has access to my data?
Only you have direct access to your cycle information. When using an app or cloud services, the data is encrypted and can only be accessed with your device’s serial number. As manufacturers, we cannot directly access your personal information without this serial number.
Can I delete my data?
Yes. All three systems provide the ability to completely delete your data—both locally on the device and in the app or cloud. This permanently removes your cycle information.
How anonymous is the data for studies or analyses?
If manufacturers use data for scientific studies, it is anonymized. Individual users cannot be identified.
Are there differences between Daysy, Lady-Comp, and Teena regarding data privacy?
- Daysy: Local data storage, optional encrypted app synchronization. . Lady-Comp: Local storage.
- Teena: App-based; data is transmitted and stored encrypted.