# U vs Body Temp Tracker

The clearest difference is in-app purchases: U at none against Body Temp Tracker's 3. U also leads on update cadence (every 5 weeks vs every 3 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Body Temp Tracker sells 3 in-app purchases, starting at $2.99 per month. U asks for nothing beyond the download.

U ships an update every 5 weeks, Body Temp Tracker every 3 months. The most recent releases landed on September 17, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | U | Body Temp Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Size | 293 MB | 13 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SMARTCHIP MICROELECTRONICS CORP.](https://appshunter.io/developer/872823142) | [Ataman Girisken](https://appshunter.io/developer/1490836439) |

## What reviewers say

### U

[App page](https://appshunter.io/ios/app/u-test/id1089459802)

**In-app purchases:** none


### Body Temp Tracker

[App page](https://appshunter.io/ios/app/body-temp-tracker/id6738320468)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $2.99 | per month |
| Quarterly Plan (3 months) | $6.99 | per 3 months |
| Annual Plan | $9.99 | per year |


## Frequently asked questions

### Is U free?

U is free to download, with no in-app purchases.

### Is Body Temp Tracker free?

Body Temp Tracker is free to download, with in-app purchases available.

### Do U or Body Temp Tracker have ads?

Neither U nor Body Temp Tracker shows ads.

### Which is updated more often, U or Body Temp Tracker?

U ships an update every 5 weeks, and Body Temp Tracker every 3 months. Most recently, U was updated on September 17, 2026 and Body Temp Tracker on September 26, 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.*