# Compatibility Test vs PROJECT

The clearest difference is ads: Compatibility Test at none against PROJECT's shown. PROJECT's advantage is update cadence (every 6 days vs every 2 months) and iOS requirement (13.4 vs 15.1). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Compatibility Test sells 2 in-app purchases, starting at $5.99 per 7 days and PROJECT sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Compatibility Test ships an update every 2 months, PROJECT every 6 days. The most recent releases landed on September 29, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Compatibility Test | PROJECT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 6 days** |
| Size | 42 MB | 47 MB |
| Requires iOS | 15.1 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Andrii Kulchytskyi](https://appshunter.io/developer/1759867572) | [Brett Cassidy](https://appshunter.io/developer/1821458102) |

## What reviewers say

### Compatibility Test

[App page](https://appshunter.io/ios/app/compatibility-test-crush-test/id6744529794)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Couples Crush Zodiac Test | $5.99 | per 7 days |
| Numerology compatibility check | $19.99 | per year |


### PROJECT

[App page](https://appshunter.io/ios/app/project-unredacted/id6747436929)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Declassified (Monthly) | $3.99 | per month |
| Declassified (Annual) | $31.99 | per year |


## Frequently asked questions

### Is Compatibility Test free?

Compatibility Test is free to download, with in-app purchases available.

### Is PROJECT free?

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

### Do Compatibility Test or PROJECT have ads?

PROJECT shows ads; Compatibility Test does not.

### Which is updated more often, Compatibility Test or PROJECT?

Compatibility Test ships an update every 2 months, and PROJECT every 6 days. Most recently, Compatibility Test was updated on September 29, 2026 and PROJECT on September 30, 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.*