Best Basal Body Temperature Apps

246+ iOS apps curated and reviewed

3.7 avg rating
19 free apps
Updated September 2026

Out of 246+ basal body temperature apps on iOS, 19 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Basal Body Temperature Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Body Temperature App For FeverBody Temperature App For FeverFree4.7★ (22K)NoYesOct 2026
2Femometer Fertility TrackerFemometer Fertility TrackerFree4.9★ (70K)NoYesOct 2026
3Natural Cycles: Fertility AppNatural Cycles: Fertility AppFree4.8★ (30K)YesYesOct 2026
4Thermometer: Body TemperatureThermometer: Body TemperatureFree4.6★ (407)NoYesOct 2026
5Body Temperature TrackerBody Temperature TrackerFree2.3★ (3)NoYesSep 2026
6Basal body temperature : eggysBasal body temperature : eggysFree1.8★ (4)YesNoMay 2026
7Body Temperature - HealthTrackBody Temperature - HealthTrackFree4.5★ (76)NoYesSep 2026
8Body Temperature NotepadBody Temperature NotepadFree—YesYesMay 2026

Top Picks for Basal Body Temperature

Body Temperature App For Fever#1

Body Temperature App For Fever by AboutMe Apps, Inc.

Thermometer. Checker. Tracker
Editor's Choice
🏥 Medical
4.7😞(22K ratings)
FreeIn-App Purchases
#21in Medical
Body Temperature App For Fever screenshot 1
Body Temperature App For Fever screenshot 2
Body Temperature App For Fever screenshot 3
Body Temperature App For Fever screenshot 4
Body Temperature App For Fever screenshot 5
Body Temperature App For Fever screenshot 6

Estimate and track body temperature trends to monitor potential fever symptoms. Log data, export reports for healthcare providers, and monitor family members' temperatures. Includes features like heart rate estimation and symptom tracking.

What We Love

  • ⭐ Accurate temperature readings
  • 📊 Helpful for tracking health symptoms
  • 🔍 Useful when no thermometer is available

Room to Improve

  • 💰 Subscription-based model
  • 🤔 Misleading claims about temperature measurement
  • 🤖 Inaccurate temperature estimates
  • 🔒 Lack of transparency around subscription details
Femometer Fertility Tracker#2

Femometer Fertility Tracker by Bongmi Global Group

Ovulation & Period Calendar
Strong Contender
💪 Health & Fitness
4.9😊(70K ratings)
FreeIn-App Purchases
Femometer Fertility Tracker screenshot 1
Femometer Fertility Tracker screenshot 2
Femometer Fertility Tracker screenshot 3
Femometer Fertility Tracker screenshot 4
Femometer Fertility Tracker screenshot 5
Femometer Fertility Tracker screenshot 6

This app helps women track their menstrual cycles, predict ovulation, and monitor fertility. It records period dates, symptoms, and test results to provide personalized insights and increase conception rates. It also supports users throughout pregnancy with tracking and educational resources.

What We Love

  • 🚀 Reliable and accurate predictions
  • 👍 Customizable and helpful features
  • 💡 Intelligent LH test recognition
  • 👍 Great for tracking cycles and ovulation

Room to Improve

  • 🐛 Syncing and connectivity issues
  • 🔍 Limited fertility factor tracking
  • 💬 Overwhelming community discussions
  • 💰 Paywall for key features
Natural Cycles: Fertility App#3

Natural Cycles: Fertility App by NaturalCycles Nordic AB

Ovulation Tracker・FDA-cleared
Worth Considering
💪 Health & Fitness
4.8😊(30K ratings)
FreeAdsIn-App Purchases
#32in Health & Fitness
Natural Cycles: Fertility App screenshot 1
Natural Cycles: Fertility App screenshot 2
Natural Cycles: Fertility App screenshot 3
Natural Cycles: Fertility App screenshot 4
Natural Cycles: Fertility App screenshot 5
Natural Cycles: Fertility App screenshot 6

This app helps women track their hormonal health and fertility using body temperature data. It offers hormone-free contraception, pregnancy planning, and insights into various cycle stages. It adapts to individual cycles, even irregular ones, providing daily fertility status.

What We Love

  • 👍 Teaches users about their cycle
  • 👍 Helps users understand their body
  • 👍 Provides a natural contraceptive option
  • 👍 Accurate in predicting ovulation and periods
  • 👍 Empowers users to take control of their fertility
  • 👍 Improves mood and reduces side effects compared to hormonal birth control
  • 👍 Useful for both preventing and planning pregnancy
  • 👍 Detailed data and insights about user's cycle

Room to Improve

  • 🐛 Inconsistent in predicting ovulation and periods for some users
  • 🐛 Thermometer issues (loud, hard to read, no Bluetooth connectivity)
  • 🐛 Difficult to use for users with irregular cycles or disrupted sleep schedules
  • 🐛 Lack of customer support responsiveness
  • 🐛 Automatic subscription renewal issues and no refunds
  • 🐛 Algorithm not always accurate, leading to unintended pregnancies
  • 🐛 Cluttered and unintuitive app interface

More Basal Body Temperature apps to explore

FAQ about Basal Body Temperature

What are the best basal body temperature apps for iPhone?
Body Temperature App For Fever tops our basal body temperature apps ranking as of September 2026, with a 4.7-star average from 22K App Store ratings, and it's free to download.
Yes — 19 of the top basal body temperature apps we rank are free to download, including Body Temperature App For Fever and Femometer Fertility Tracker.
Body Temperature App For Fever has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 246+ basal body temperature apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.

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