Femometer
Cycle and fertility tracking app paired with temperature-sensing smart rings.
Updated · AppBreakup editorial · iOS, Android
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About Femometer
Femometer started as a basal body temperature thermometer and fertility app and has moved towards smart rings made for women. The rings measure finger temperature overnight and feed the Femometer app, which uses those readings with sleep, heart and activity data to show cycle phases, predict ovulation and track changes through perimenopause and menopause. The range includes a first-generation ring, a Gen 2 ring with a ceramic finish and a slimmer Ring Air, and the newer two add SoMind, an AI health coach that answers questions in plain language. The app is free to download and can be used for manual logging, but its main value comes from the ring, which is a separate hardware purchase. It suits people who want automatic temperature-based cycle tracking without taking their temperature every morning. Those who just want a period diary, or who already own an Oura or similar ring, may not need it.
Best for: People who want automatic temperature-based cycle and ovulation tracking from a ring.
Pros and cons
What works
- Automatic overnight temperature tracking with a ring
- Covers cycles, fertility and menopause in one app
- Several ring sizes and styles
Why people leave
- Main features need a separate ring purchase
- AI coach only works with the newer rings
Femometer vs Premom, Glow and Clue
From each app's listing and the prices verified on its own site. A dash means we haven't verified it yet.
Top Femometer alternatives
See all 5- 1
Premom68.8Free app that charts ovulation test strips and manual BBT readings, no ring needed.
- 2
Glow64.8Software-only fertility tracker with partner sharing and pregnancy and baby apps.
- 3
Clue61.8Simple, science-led cycle tracker without any hardware to buy.
- 4
Flo59.4Widely used period tracker that works from manual logs alone.
- 5
Ovia57.5Free fertility and cycle tracking that carries on into pregnancy and parenting tracking in sister apps.
Why people left Femometer
In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.
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Reviews
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Femometer: common questions
What is Femometer?
Femometer: Cycle and fertility tracking app paired with temperature-sensing smart rings. Best for people who want automatic temperature-based cycle and ovulation tracking from a ring. Available for iOS and Android.
Is Femometer free?
Femometer has a free plan and paid plans.
Is Femometer open source?
No, Femometer is not open source.
What platforms does Femometer run on?
Femometer is available for iOS and Android.
What are the best alternatives to Femometer?
The highest-ranked Femometer alternatives right now are Premom, Glow and Clue. See the full ranked list for pricing, platforms and verified facts.
Femometer vs Premom: what's the difference?
Both Femometer and Premom are free with paid plans. Both run on iOS and Android.