# Basal body temperature vs Thermometer Log

The clearest difference is review sentiment: Thermometer Log at 50% against Basal body temperature's 0%. Thermometer Log also leads on rating (4.8 vs 1.8) and update cadence (every 2 months vs every 26 months). Basal body temperature's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 15.6). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Thermometer Log sells 1 one-off in-app purchase. Basal body temperature asks for nothing beyond the download.

Thermometer Log holds the better App Store score, 4.8 against 1.8. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews point the same way: 0% of Basal body temperature's written reviews are positive against 50% of Thermometer Log's.

Basal body temperature ships an update every 26 months, Thermometer Log every 2 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Basal body temperature | Thermometer Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (4 ratings)](https://appshunter.io/ios/app/basal-body-temperature-eggys/id1475450979/reviews) | **[4.8 (6 ratings)](https://appshunter.io/ios/app/thermometer-log/id1546929547/reviews)** |
| Number of ratings | 4 | **6** |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 26 months | **Every 2 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 102 MB | 6 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [familiar Incorporated](https://appshunter.io/developer/796310096) | [Kei Suefuji](https://appshunter.io/developer/1388335881) |

## What reviewers say

### Basal body temperature

[App page](https://appshunter.io/ios/app/basal-body-temperature-eggys/id1475450979)

Track your basal body temperature daily to understand your fertility window and predict future cycles. The app offers easy daily recording, visual graphs, and calendar views to help you monitor your health and potential for pregnancy.

**Highlights:** Basal body temperature charting, Pregnancy chance prediction, Calendar view with future dates, Daily record input with morning alarm, Passcode protection for privacy, Data backup functionality, Ad removal option

**Features:** macOS Compatibility

**In-app purchases:** none


### Thermometer Log

[App page](https://appshunter.io/ios/app/thermometer-log/id1546929547)

Easily record and track your body temperature with this intuitive app. View historical data, analyze trends with graphs, and export your records. Supports both Celsius and Fahrenheit units.

**Highlights:** Easy temperature recording, Celsius and Fahrenheit support, Weekly, monthly, and 3-month graphs, Average temperature display, Data correction and addition, CSV export

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PREMIUM | $4.99 | one-time |


## Frequently asked questions

### Is Basal body temperature free?

Basal body temperature is free to download, with no in-app purchases.

### Is Thermometer Log free?

Thermometer Log is free to download, with in-app purchases available.

### Which has better reviews, Basal body temperature or Thermometer Log?

Thermometer Log is rated higher. Basal body temperature averages 1.8 out of 5 from 4 ratings, while Thermometer Log averages 4.8 from 6 ratings.

### Do Basal body temperature or Thermometer Log have ads?

Both Basal body temperature and Thermometer Log show ads.

### Which is updated more often, Basal body temperature or Thermometer Log?

Basal body temperature ships an update every 26 months, and Thermometer Log every 2 months. Most recently, Basal body temperature was updated on October 25, 2026 and Thermometer Log on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*