# Size test vs Prometheus

The clearest difference is price: Prometheus at Free against Size test's $0.99. Prometheus also leads on device support (3 vs 1). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

Prometheus is free to download; Size test costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Size test ships an update every 10 months, Prometheus every 16 months. The most recent releases landed on October 29, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Size test | Prometheus |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.3 (16 ratings)](https://appshunter.io/ios/app/prometheus-online-courses/id1213523151/reviews)** |
| Number of ratings | — | **16** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 16 months |
| Monetization | — | Freemium |
| Size | 1 MB | 35 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Viacheslav Romanenko](https://appshunter.io/developer/1046372418) | [Prometheus NGO](https://appshunter.io/developer/1213523150) |

## What reviewers say

### Size test

[App page](https://appshunter.io/ios/app/size-test/id1059703529)

**In-app purchases:** none


### Prometheus

[App page](https://appshunter.io/ios/app/prometheus-online-courses/id1213523151)

Access a vast library of online courses from top educators in Ukraine, covering business, IT, personal development, and more. Learn new skills, gain certificates, and advance your career with this educational platform.

**Highlights:** Wide range of course topics, Free and paid course options, Learn anytime, anywhere, Downloadable lectures, Certificates for resume, Expert instructors

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

**In-app purchases:** none


## Frequently asked questions

### Is Size test free?

Size test costs $0.99, with no in-app purchases.

### Is Prometheus free?

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

### Do Size test or Prometheus have ads?

Neither Size test nor Prometheus shows ads.

### Which is updated more often, Size test or Prometheus?

Size test ships an update every 10 months, and Prometheus every 16 months. Most recently, Size test was updated on October 29, 2026 and Prometheus on November 2, 2026.

---

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