# Synthesis24 vs 24  (+

The clearest difference is ads: Synthesis24 at none against 24  (+'s shown. Synthesis24 also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.6). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Synthesis24 | 24  (+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/24-plus-x/id6755933589/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | — | Ad-supported |
| Size | 49 MB | 6 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [杰超 杨](https://appshunter.io/developer/1364053114) | [Gilbert Gonsalves](https://appshunter.io/developer/492123194) |

## What reviewers say

### Synthesis24

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 24  (+

[App page](https://appshunter.io/ios/app/24-plus-x/id6755933589)

A free math puzzle game where you use four numbers and basic arithmetic operations to reach the target number 24. It's designed to enhance arithmetic skills, particularly for middle and high school students.

**Highlights:** Four-digit arithmetic puzzles, Use +, -, ÷, x operations, Parentheses for grouping, Improves math skills, Targeted for students

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Synthesis24 free?

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

### Is 24  (+ free?

24  (+ is free to download, with no in-app purchases.

### Do Synthesis24 or 24  (+ have ads?

24  (+ shows ads; Synthesis24 does not.

### Which is updated more often, Synthesis24 or 24  (+?

Synthesis24 ships an update every 3 months, and 24  (+ every 3 months. Most recently, Synthesis24 was updated on October 9, 2026 and 24  (+ on October 14, 2026.

---

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