# TempGrapher vs Thermometer Log

The clearest difference is price: Thermometer Log at Free against TempGrapher's $0.99. Thermometer Log also leads on rating (4.8 vs 1.0) and review sentiment (50% vs 27%). TempGrapher's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

Thermometer Log is free to download; TempGrapher costs $0.99 up front. Thermometer Log sells 1 one-off in-app purchase. TempGrapher asks for nothing beyond the download.

Thermometer Log holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Thermometer Log has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 27% of TempGrapher's written reviews are positive against 50% of Thermometer Log's.

TempGrapher ships an update every 3 months, Thermometer Log every 2 months. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | TempGrapher | Thermometer Log |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/tempgrapher/id501935336/reviews) | **[4.8 (6 ratings)](https://appshunter.io/ios/app/thermometer-log/id1546929547/reviews)** |
| Number of ratings | 1 | **6** |
| Positive reviews | 26.7% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 6 MB | 6 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [kazuhiko kuroda](https://appshunter.io/developer/460872954) | [Kei Suefuji](https://appshunter.io/developer/1388335881) |

## What reviewers say

### TempGrapher

[App page](https://appshunter.io/ios/app/tempgrapher/id501935336)

Easily log your body temperature with a simple slider interface. View your temperature history as a line graph in both Celsius and Fahrenheit, with HealthKit support. Data is saved to your default calendar and can be shared via email or cloud services.

**Highlights:** Simple slider input for temperature, Celsius/Fahrenheit conversion, Line graph visualization, HealthKit integration, Calendar app data saving, CSV data export, Dark mode support

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

**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 TempGrapher free?

TempGrapher costs $0.99, with no in-app purchases.

### Is Thermometer Log free?

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

### Which has better reviews, TempGrapher or Thermometer Log?

Thermometer Log is rated higher. TempGrapher averages 1.0 out of 5 from 1 ratings, while Thermometer Log averages 4.8 from 6 ratings.

### Do TempGrapher or Thermometer Log have ads?

Thermometer Log shows ads; TempGrapher does not.

### Which is updated more often, TempGrapher or Thermometer Log?

TempGrapher ships an update every 3 months, and Thermometer Log every 2 months. Most recently, TempGrapher was updated on October 2, 2026 and Thermometer Log on October 10, 2026.

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