FAQs cyclotest mySense

Everything you always wanted to know about cyclotest mySense

Here we have collected the most frequently asked questions about cyclotest mySense. If your question is not answered here, please write to us at info@cyclotest.de or call us at (+49) 93 42 / 92 40 40. We look forward to talking to you.

All about temperature measurement

You should perform the measurements once a day from the start of menstruation until the infertile phase after ovulation. Important: The measurements should be taken lying down, immediately after waking up and before getting up.

In order that the measured values do not fluctuate too much and can be evaluated, you should measure the basal temperature at the same time within a cycle if possible. At the beginning of each cycle you define a 4-hour measuring window in which you can determine the temperature value in this cycle. Measurements outside this time window are not saved.

Tip: If you always get up at 6:30 a.m. during the week, for example, but like to sleep a little longer at the weekend, it is advisable to set the measurement window to 6:00 a.m. – 10:00 a.m. However, make sure that your temperature values differ at the weekend and that they are not included if necessary.

When cyclotest® mySense has got to know you better (after approx. 6 cycles), the number of days marked as fertile may decrease, so that you no longer have to determine your body temperature at the beginning of your period. In order not to miss the start of the measuring phase, it is best to activate the reminder function in the menu under Reminder > Measure your basal temperature and select the option “Only remind me on relevant cycle days” under “Frequency”. Thus cyclotest® mySense only reminds you of the temperature measurement when it is important for determining your fertile days.

If you like regularity and want to get to know your body exactly, you can of course also determine the body temperature on each cycle day.

Measuring basal body temperature with cyclotest® mySense is as simple as measuring fever: press the start button and wait until the second beep sounds. Then simply place the sensor under one of the tongue pockets and hold it there with the mouth closed until the measuring process is completed after another beep.

Optionally you can measure vaginally or rectally. The measurement normally takes between 30 and 60 seconds.

You can measure orally, vaginally or rectally. You can set the measurement location at the beginning of each cycle.
If you experience irregularities such as insufficient sleep, partying, alcohol, stress, lavish eating late in the evening, taking temperature-changing medication, illness or fever, you should skip the measurement. Of course, you can still measure and record a disturbance for that day. cyclotest mySense will then exclude this value from the calculation of fertile days.
When your first natural menstruation begins after stopping hormonal contraception, you can start measuring. Be careful not to confuse natural bleeding with withdrawal bleeding.
The measuring time of 3 minutes dates back to the time when basal thermometers (like other thermometers) were still filled with mercury as measuring liquid. Since this has no longer been permitted since 2009, and since digital measurement has become established at the same time, there have been new measurement times of less than 3 minutes. cyclotest mySense belongs to the latest generation of basal temperature sensors, which enables fast, reliable measurement.

The reason for this is simple: digital clinical thermometers are set so that they indicate the maximum temperature measured to date after a certain period of time without a significant rise in temperature. Since the basal temperature measurement depends on tenths of a degree, these two variables are set differently here: On the one hand, this period is defined longer, and on the other hand, the temperature rise is set lower. The longer measurement time results from these two factors.

All about the thermometer

When the device is switched off, press and hold the M/bt data transmission button for at least 1 second, but no longer than 5 seconds, until the Bluetooth symbol appears in the display. The device now connects to the app. If the connection is successful, the display shows “APP” and the display lights up green.
In normal use (one daily measurement incl. data transfer) the battery lasts approx. 1 year. By the way: When you switch on the thermometer, a so-called full segment display appears briefly each time, in which the battery symbol also appears. This is not an indication of a low charge level!
If the battery symbol at the bottom right of the display flashes while the thermometer is in use, this indicates that the battery is low. You can then make a few more measurements, but you should have a new battery ready. If an empty battery symbol appears, you can no longer perform a measurement. When you switch on the thermometer, a so-called full-segment display appears briefly each time, in which the battery symbol also appears. This is not an indication of a low charge level!
Simple: Open the battery compartment on the back using a coin counterclockwise and insert the new CR2032 (3.0 V) lithium coin cell. Make sure that the “+” points upwards. Then close the battery compartment again and synchronize the thermometer with the app again: Activate Bluetooth on the smartphone, open the app and then press the M or On-/Off button on the thermometer.
No – the trick is simply that you have to stay on the button with your fingertip for about 1 second. You should not press the button with your fingernail, as this can cause damage.

All about the app

cyclotest mySense uses our proven cyclotest algorithm, which is based on the symtothermal method. The method reliability of the symptothermal method is up to 99.7 % (Pearl index 0.3). The Pearl index of the temperature method is 1-3.1 The cyclotest mySense cycle app maps both the temperature method and the symptothermal method. Further information can be found on our Pearl Index page.
Please check whether you have measured within your measurement time window, because only these values are transferred. You can easily check this by holding down the M/Bluetooth button on the cyclotest mySense thermometer until you are in memory (display M). The time and date are displayed here in addition to the temperature value. By pressing the M/Bluetooth button you can also query older values.
No. The measurement result will be transmitted the next time the smartphone is switched on again. cyclotest mySense can store up to 30 measurement results and the app automatically fetches the missing measurements.
Yes, but only until the first valid measurement. After that it can only be changed again in the next cycle.
If you have started a new cycle by entering a bleeding, you cannot undo this entry.
The export function makes exporting or printing very easy. At the bottom right in portrait view and at the top left in landscape format you will find the export button, which shows an arrow pointing upwards. Tap the button to export the selected cycle as a PDF document. You can save it, download it, send it and of course print it.
If you are in the first cycle, you can add up to six previous cycles that you have collected using, for example, a rule calendar or another basal thermometer.
The subsequent deletion of cycles is not possible, but you can set individual cycles to inactive at any time so that they are not included in the evaluation.
You can push your message to your smartphone to measure basal body temperature and/or document cervical mucus. Under Menu > Reminder you can activate all reminders.
If you switch to another smartphone after installing the app, you will be asked if you already have an account. After logging in, you will be told that this account is already paired with another smartphone. You can now pair the account with the new phone by asking the following question.

Questions about everything else

As soon as your menstruation is regular and you no longer breast-feed at night, you can use cyclotest mySense. Before this, you would probably lack the sleep needed for an unaltered measurement (at least 5 hours at a time).
The thermometer takes the current time from the app and also shifts the measurement time window according to the time offset. Press the M/Bluetooth button briefly before the first measurement (at least 1 second, maximum 5 seconds) until the Bluetooth symbol appears in the display.
The thermometer takes the current local time from the app and also shifts the measurement window according to the time offset. Press the M/Bluetooth button briefly before the first measurement (at least 1 second, maximum 5 seconds) until the Bluetooth symbol appears in the display. If you are in a different time zone, you should generally not start taking measurements until you have acclimatised.
If your cycles are between 16 and 45 days, you can use cyclotest mySense for contraception or for fertility. In addition, the length of your 2nd half of the cycle after ovulation should not be less than 11 days.
Your data will be stored in a cloud on servers in Germany. Our partner Hetzner is certified according to DIN ISO/IEC 27001:2013, which proves an adequate security management, the security of the data, the confidentiality of the information and the availability of the IT systems.


1 Diedrich et al.: Gynäkologie & Geburtshilfe, 2. Auflage, Springer Medizin Verlag, Heidelberg 2000, 2007