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)
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
Estimate body temperature using your smartphone without a physical thermometer. Track heart rate, blood pressure, and sync with Apple Watch for real-time fever alerts. Log custom health data and generate shareable PDF reports.
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
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.
Are there free basal body temperature apps for iPhone?
Yes — 19 of the top basal body temperature apps we rank are free to download, including Body Temperature App For Fever and Thermometer: Body Temperature.
Does Body Temperature App For Fever have ads or in-app purchases?
Body Temperature App For Fever has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
How many basal body temperature apps are on the App Store?
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.
What does the Body Temperature App for Fever do?
This app allows you to estimate and track your body temperature trends to help you monitor potential fever symptoms. It also enables you to log data, export reports for your doctor, and even estimate your heart rate using your phone's camera.
Can I use this app to diagnose medical conditions?
No, this app is for wellness use only and cannot be used for diagnostics or medical purposes. It is intended to improve your awareness of general wellness and does not diagnose, treat, mitigate, or prevent any disease or symptom. Always seek professional medical advice for any health concerns.
