# Synthesis24 vs Croc 24

The clearest difference is in-app purchases: Synthesis24 at none against Croc 24's 1. Synthesis24 also leads on iOS requirement (15.0 vs 17.0). Croc 24's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Croc 24 sells 1 one-off in-app purchase. Synthesis24 asks for nothing beyond the download.

Synthesis24 ships an update every 3 months, Croc 24 every 3 weeks. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Synthesis24 | Croc 24 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/croc-24-math-game/id6746104087/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 49 MB | 23 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [杰超 杨](https://appshunter.io/developer/1364053114) | [Wei Wang](https://appshunter.io/developer/1467609434) |

## What reviewers say

### Synthesis24

[App page](https://appshunter.io/ios/app/synthesis24/id1606353407)

**Features:** macOS Compatibility

**In-app purchases:** none


### Croc 24

[App page](https://appshunter.io/ios/app/croc-24-math-game/id6746104087)

This app offers a fun way to practice and master the 24 game. It features a free calculator for finding solutions, a challenge mode for testing skills, and a history tracker to monitor progress. Enjoy a delightful and ad-free mathematical adventure.

**Highlights:** Free calculator for finding all solutions, Challenge mode with random puzzles, History tracker for progress monitoring, Powerful mathematical algorithm, Adorable and intuitive interface, Ad-free gaming experience

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Premium | $1.99 | one-time |


## Frequently asked questions

### Is Synthesis24 free?

Synthesis24 is free to download, with no in-app purchases.

### Is Croc 24 free?

Croc 24 is free to download, with in-app purchases available.

### Do Synthesis24 or Croc 24 have ads?

Neither Synthesis24 nor Croc 24 shows ads.

### Which is updated more often, Synthesis24 or Croc 24?

Synthesis24 ships an update every 3 months, and Croc 24 every 3 weeks. Most recently, Synthesis24 was updated on October 9, 2026 and Croc 24 on October 16, 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.*