The Fertility Awareness iPhone app for serious women


Selene is designed to track and chart all the important signs of your menstrual cycle, including the ones used to identify ovulation by the Fertility Awareness or Natural Family Planning methods. Log your basal body temperature and other symptoms and signs on the Day tab, and view your temperature shift and peak day on the Chart tab.

Selene is not intended as a tutorial for FAM or NFP. If you have not already learned one of those methods, we highly recommend the book Taking Charge of Your Fertility by Toni Weschler.


  1. Day tab
  2. Chart tab
  3. Automatic Fertility and Ovulation Detection
  4. Calendar tab
  5. History tab
  6. Statistics tab
  7. Note Settings tab
  8. Other Settings
  9. Free trial
  10. Ask an Expert
  11. Data Backup and Restore

Day tab

Chart tab


Annotated chart
Click to expand!

Automatic Fertility and Ovulation Detection

Selene can evaluate your chart by the rules of Taking Charge of Your Fertility by Toni Weschler. For more detail about what rules are evaluated, see Help: Fertility Detection.

When fertility detection is on, Selene does the following:

On the chart and calendar, the following background shading is used to indicate fertility:

On the calendar, estimates of your upcoming ovulation days are marked with fuzzy circles. These are simply extrapolated from your history: if your own average period length is 27.3 days, and on average you ovulate on day 13, then Selene simply adds those numbers to mark your calendar. This is not a reliable method of predicting fertility for birth control or pregnancy achievement, and so these fuzzy future guesses marked on your calendar should not be used for these purposes. (For new users who haven't entered any history of their own yet, Selene assumes 29.1 days for period length and day 14 for ovulation.)

We highly recommend the book Taking Charge of Your Fertility by Toni Weschler to help you interpret your own signs. This app applies its rules blindly, and may have bugs -- the judgement of a knowledgeable user should always be applied as a check where matters as important as pregnancy are at stake.

Calendar tab

Calendar Legend

History tab

Statistics tab

Note Settings tab

Other Settings

There are some options you can change in the "Selene" section of the main Settings app on your phone's Home screen:

Free trial

The free trial version comes with two limitations:

To upgrade, visit the Upgrade tab.

Ask an Expert

If you have a question about your health or fertility or the meaning of your charts, inexpensive pre-paid consultations are available.

  1. Go to the Ask an Expert tab.
  2. Enter your question.
  3. Choose whether to allow your data to be forwarded to the consultant. (It is not required to send your data, but if you don't, you will likely have to write much more to explain what your question is.)
  4. Buy the consultation.
  5. Tap the Next button to generate the message and open the Mail widget.
  6. Tap Send in top right corner of the Mail widget.

You will receive a response from the expert consultant via email within a few days.

Note: If you have a technical question about Selene, or think it has plotted your data incorrectly, please email for free. Only health-related questions need a paid consultation.

Data Backup and Restore

Apple Device Backups

All Selene data is backed up every time your phone or tablet does a backup to iCloud or iTunes, so it is possible to recover lost data by restoring your whole device. Apple provides instructions.

Selene Data Backups

Selene also creates backup files in its File Sharing directory, which is accessible through iTunes:

  1. Plug your device in by USB to your computer with iTunes. (If you are transferring your data to a new device, note you must connect here the old device, the one with your data on it.)
  2. In iTunes, open the device page and go to the Apps tab.
  3. Scroll down to the File Sharing section and click on Selene in the Apps list there.
  4. Backup files are named like 'auto-backup-20130701.selenebk'.

Selene keeps rolling backups for about two weeks, but you can use the Save To... function in iTunes to make copies of these files and store them wherever you like.

If you lose your data in Selene, or wish to transfer it to a new device, you can restore a backup file:

  1. Check that Selene is already installed on the device you want to restore to. If necessary, download it again from the App Store, then go to the Upgrade tab and restore your previous purchase of the app.
  2. Send the backup file to your device, for instance by emailing it to yourself or using Dropbox or something similar to transfer it.
  3. On the device, tap on the file to open it.
  4. Tap on "Open in Selene".
  5. Selene will open and present a Restore From Backup? screen. Tap Restore to proceed.
  6. Selene will close after restoring; reopen the app to see the restored data.

Important Note: restoring a backup file will completely replace any existing data in Selene. If you go ahead with a backup and discover you overwrote something important, you can recover it from iTunes File Sharing again in the safety backup file named like 'backup-before-restore-20130617-1.selenebk'.