Fertility Friend
The charting veteran of this category: the service has been running since 1998 and the app inherits that history for better and worse. Automatic ovulation detection, coverline, colour coded fertility calendar, ovulation test logs and a searchable gallery of shared charts numbering in the hundreds of thousands for comparing patterns. Newer versions import temperature and sleep from Oura, Fitbit and Pixel Watch, and there are no ads.
Depth of charting is where it wins, which makes it a long standing favourite for conception over many cycles and for conversations with a fertility specialist. Newcomers often find the density overwhelming: the visual language belongs to a spreadsheet, and the most useful analysis sits in the paid VIP tier after a trial that needs no card.
Pros
- Ovulation detection refined since 1998
- Detailed temperature charts with coverline
- Huge gallery of real charts to compare
- Imports data from Oura and Fitbit
- Trial of premium features without a card
Cons
- Dated interface and dense screens
- Steep learning curve for beginners
- Best analysis behind the VIP tier
- Overkill for casual period tracking
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