# 2357P vs lostphone#9

The clearest difference is iOS requirement: lostphone#9 at 7.0 against 2357P's 15.0. On price, update cadence, ads 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.

2357P ships an update every 15 months, lostphone#9 every 19 months. The most recent releases landed on October 15, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 2357P | lostphone#9 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/2357p/id957233368/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 15 months** | Every 19 months |
| Monetization | Free | Free |
| Size | 6 MB | 45 MB |
| Requires iOS | 15.0 | **7.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yuantong Lu](https://appshunter.io/developer/884739279) | [takeshi nagahara](https://appshunter.io/developer/1173326215) |

## 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


### lostphone#9

[App page](https://appshunter.io/ios/app/lostphone9/id1190166441)

Test your memory by trying to recall phone numbers. This game challenges you to remember more numbers than the average person in today's digital age.

**Highlights:** Memory challenge, Phone number recall, Nostalgic theme, Simple gameplay

**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 lostphone#9 free?

lostphone#9 is free to download, with no in-app purchases.

### Do 2357P or lostphone#9 have ads?

Neither 2357P nor lostphone#9 shows ads.

### Which is updated more often, 2357P or lostphone#9?

2357P ships an update every 15 months, and lostphone#9 every 19 months. Most recently, 2357P was updated on October 15, 2026 and lostphone#9 on October 6, 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.*