# 2357P vs Sosu der

The clearest difference is ads: 2357P at none against Sosu der's shown. Sosu der's advantage is update cadence (every 4 months vs every 15 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

2357P ships an update every 15 months, Sosu der every 4 months. The most recent releases landed on June 1, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | 2357P | Sosu der |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/2357p/id957233368/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 6 MB | 140 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yuantong Lu](https://appshunter.io/developer/884739279) | [Hirobumi Onishi](https://appshunter.io/developer/1740115066) |

## What reviewers say

### 2357P

[App page](https://appshunter.io/ios/app/2357p/id957233368)

A simple number-based game where players decompose and compose numbers using prime bases 2, 3, 5, and 7. Aim to achieve higher scores and compete on the Game Center leaderboard.

**Highlights:** Number decomposition, Number composition, Prime number bases (2, 3, 5, 7), Score-based gameplay, Game Center leaderboard integration

**Features:** macOS Compatibility

**In-app purchases:** none


### Sosu der

[App page](https://appshunter.io/ios/app/sosu-der/id6483364985)

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

**In-app purchases:** none


## Frequently asked questions

### Is 2357P free?

2357P is free to download, with no in-app purchases.

### Is Sosu der free?

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

### Do 2357P or Sosu der have ads?

Sosu der shows ads; 2357P does not.

### Which is updated more often, 2357P or Sosu der?

2357P ships an update every 15 months, and Sosu der every 4 months. Most recently, 2357P was updated on June 1, 2026 and Sosu der on September 13, 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.*