# Basal Body Temperature Calc. — Basal body temperature

> Tracks basal body temperature to identify fertile windows and menstrual cycles. (iPhone/iPad app by Gianluca Natalini.)

- Source: https://appshunter.io/ios/app/basal-body-temperature-calc/id351060251 (this page in markdown: same URL + `.md`)
- Developer: [Gianluca Natalini](https://appshunter.io/developer/348380792)
- Category: Medical, Health & Fitness
- Price: $0.99
- Rating: 1.30/5 from 18 App Store ratings · 4 written reviews indexed
- Age rating: 17+
- Requires: iOS 16.6 · 2 MB
- Languages: American English
- Released: 2010-01-21
- Data updated: 2026-08-16
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/basal-body-temperature-calc/id351060251/reviews.md

## What is Basal Body Temperature Calc.?

"Basal Body Temperature (BBT) Calculator" is a program that helps women in the writing, understanding and archiving (for future reference) of diagrams that illustrate the evolution over the time of their basal body temperature (measured near vaginal area upon waking, before getting out of bed). The resulting diagram is very useful for estimating the days of ovulation and may therefore be a useful tool to identify the fertile period. The available medical documentations, even on the internet, explains in greater detail the utility of managing this type of information/diagrams.
The informations computed by the BBT diagram:
- will help you to know your health, menstrual and fertile phases
- allows you to live sexuality with more serenity
With probabilistic prediction, you'll know when You can try to conceive a child or when avoid becoming pregnant.

Features:
- Daily registration of the basal body temperature values, state of health, menstrual period, the relative level of bleeding, fever, sex
- Archive an infinite number of diagrams in the years
- View the status of fertility (days with high probability of conception)
- Indication of the probability of pregnancy in cases of sex
- Prediction of the date of the new menstrual cycle
- Graphical display of the diagrams of the basal body temperature (including the information described above)
- Zoom and pan of the diagrams
- Ability to save the diagrams of the BBT in the "Photo Album"
- Ability to send the diagrams of the BBT via e-mail

BBT Scientific References and Medical Sources:
http://www.ngcybit.it/iTunesApp/basal-body-temperature-calculator/bbt-scientific-references-and-medical-sources.html

## Key features

- Daily temperature and health logging
- Menstrual cycle tracking
- Fertility phase identification
- Pregnancy probability indication
- Graphical BBT chart display
- Save and email charts

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/basal-body-temperature-calc/id351060251/reviews.md

### 1/5 — Useless

*2025-05-22*

This app doesn’t work an appears to just be a pdf

### 2/5 — Really inflexible app

*2010-02-15*

I thought this app would be a lot more flexible than it is. I don't care that it's in Celsius, but I wish you could skip a day (it does not let you do so). I also really hate apps that assume all women ovulate on day 14 and menstruate on day 28. If I knew I was going to ovulate on day 14, I wouldn't need this app! It's not ideal for women with irregular cycles.

### 1/5 — Temps only in Celsius

*2010-02-10*

Seriously? I have to open a conversion program just to figure out what temp to enter since I have to convert from fahrenheit to Celsius for it to even let me enter a temp.  I would have expected something that simple even in a free app.  It certainly was not worth the $2 I paid.  Also there is no explanation of what the symbols and lines mean on the graph, no way to change the predicted fertile phase or ovulation date, and the website listed doesn't work.

### 1/5 — Don

*2010-01-21*

Not user-friendly at all.

## Frequently asked questions about Basal Body Temperature Calc.

### What is Basal Body Temperature Calc. used for?

Basal Body Temperature Calc. is used to record and analyze daily basal body temperature readings. This data helps users understand their menstrual cycles, identify fertile windows for conception, and predict ovulation.

### How accurate is Basal Body Temperature Calc. for predicting fertility?

The app provides probabilistic predictions based on BBT data. Medical documentation suggests that managing this type of information is useful for estimating ovulation days and identifying fertile periods.

### What information can I log with Basal Body Temperature Calc.?

You can log daily basal body temperature values, state of health, menstrual period, bleeding level, fever, and sexual activity. This comprehensive logging helps create detailed charts.

### Can I save and share my BBT charts?

Yes, Basal Body Temperature Calc. allows you to save your BBT diagrams to your device's "Photo Album" and send them via email. This makes it easy to archive or share your data with healthcare providers.

### What devices does Basal Body Temperature Calc. support?

Basal Body Temperature Calc. is available for iPhone and iPod devices. It was last updated on November 25, 2021, with version 1.6.

### What is the price of Basal Body Temperature Calc.?

Basal Body Temperature Calc. is a paid application, priced at $0.99. It does not contain advertisements or in-app purchases.

### What is the age rating for Basal Body Temperature Calc.?

Basal Body Temperature Calc. has an age rating of 17+. This is likely due to the app's focus on fertility and sexual health information.

### How often is Basal Body Temperature Calc. updated?

The latest version of Basal Body Temperature Calc. is 1.6, which was released on November 25, 2021. The app was originally released on January 21, 2010.

## Version history (last 5 releases)

### 1.7 — 2026-07-15

- Minor bugs fixed

### 1.6 — 2021-11-25

- Minor bugs fixed

### 1.5.1 — 2016-05-03

This app has been updated by Apple to display the Apple Watch app icon.

Minor bugs fixed

### 1.5 — 2014-10-01

- Fixed some bugs for iOS 8

### 1.4 — 2010-10-29

- Temperature in *F (fahrenheit) and °C (celsius)
- Possibility for "day basal body temperature not measured" (if you forgot to measure some temperatures)

## Apps similar to Basal Body Temperature Calc.

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Body Temperature App For Fever](https://appshunter.io/ios/app/body-temperature-app-for-fever/id1516844582) | 4.7 (22,094) | Free | Medical |
| [Temperature + Blood Oxygen app](https://appshunter.io/ios/app/temperature-plus-blood-oxygen-app/id1544929861) | 3.7 (72) | Free | Medical |
| [Body Temperature: Thermometer.](https://appshunter.io/ios/app/body-temperature-thermometer/id6738586106) | 4.3 (37) | Free | Medical |
| [Fever Track: Body Temperature](https://appshunter.io/ios/app/fever-track-body-temperature/id1543393818) | 3.9 (178) | Free | Medical |
| [Fever Thermometer \| Body Temp](https://appshunter.io/ios/app/fever-thermometer-body-temp/id1508978882) | 4.3 (257) | Free | Medical |
| [Body Temperature App Fever Log](https://appshunter.io/ios/app/body-temperature-app-fever-log/id1594990468) | 5.0 (7) | Free | Medical |

## More apps by Gianluca Natalini

- [Stroboscope Alarm Clock](https://appshunter.io/ios/app/stroboscope-alarm-clock/id348380789)
- [Lightning Distance Calculator](https://appshunter.io/ios/app/lightning-distance-calculator/id348821275)
- [Chronometer and Countdown](https://appshunter.io/ios/app/chronometer-and-countdown/id348852710)
- [Vibrometer](https://appshunter.io/ios/app/vibrometer/id353867884)
- [myVibrometer](https://appshunter.io/ios/app/myvibrometer/id357421007)

All apps by Gianluca Natalini: https://appshunter.io/developer/348380792

## Related topics

[fertility temperature](https://appshunter.io/ios/topics/fertility-temperature)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-16.*