# Unit Eater vs Thrive Sleep

The clearest difference is in-app purchases: Thrive Sleep at none against Unit Eater's 2. Thrive Sleep also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Unit Eater sells 2 in-app purchases, starting at $0.99 per month. Thrive Sleep asks for nothing beyond the download.

Unit Eater ships an update fortnightly, Thrive Sleep every 3 weeks. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Unit Eater | Thrive Sleep |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 47 MB | 35 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tom Leon Schmidt](https://appshunter.io/developer/1634212175) | [Qingdao Richmat Intelligence Technology Inc.](https://appshunter.io/developer/1814751082) |

## What reviewers say

### Unit Eater

[App page](https://appshunter.io/ios/app/unit-eater/id6742549723)

This utility app functions as a powerful calculator that handles unit conversions and calculations. It supports a vast array of predefined units and allows users to define their own, making it ideal for scientific and academic tasks. Features include a calculation history, customizable results, and dark mode.

**Highlights:** Unit conversion and calculation, Custom unit definition, Extensive unit library, Calculation history, Customizable result format, Dark mode

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Monthly | $0.99 | per month |
| Premium - Pay once | $3.99 | one-time |


### Thrive Sleep

[App page](https://appshunter.io/ios/app/thrive-sleep/id6749285652)

**In-app purchases:** none


## Frequently asked questions

### Is Unit Eater free?

Unit Eater is free to download, with in-app purchases available.

### Is Thrive Sleep free?

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

### Do Unit Eater or Thrive Sleep have ads?

Neither Unit Eater nor Thrive Sleep shows ads.

### Which is updated more often, Unit Eater or Thrive Sleep?

Unit Eater ships an update fortnightly, and Thrive Sleep every 3 weeks. Most recently, Unit Eater was updated on November 4, 2026 and Thrive Sleep on October 31, 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.*