2357P vs Sosu der
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
2357P
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.
- Number decomposition
- Number composition
- Prime number bases (2, 3, 5, 7)
- Score-based gameplay
- Game Center leaderboard integration
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2357P is a simple game about number. 2, 3, 5 and 7 can compose many numbers, decompose numbers with these base numbers and go for higher score! 2 * 3 = 6 2 * 3 * 5 = 30 2 * 3 * 5 * 7 = 210 2 * 2 * 3 * 5 = 60 2 * 2 * 3 * 5 * 7 = 420 P = any prime number that can't be decomposed Try to break the record and see who's on the Game Center leaderboard!
Sosu der
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This app is a quiz application that determines whether a number is prime or composite and swipes the correct answer. A prime number is a natural number greater than 1 that is not divisible by any other number except 1 and the number itself. For example, 2, 3, 5, and 7 are single-digit prime numbers. Composite numbers (composite numbers) are natural numbers greater than 1 that are not prime and are represented by the product of smaller natural numbers (e.g., 4 = 2 x 2, 6 = 2 x 3). Through this app, you can test your judgment and reflexes while having fun learning these mathematical concepts. ... How many two-digit, three-digit, and four-digit prime numbers do you know? Translated with www.DeepL.com/Translator (free version)
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | 2357P | Sosu der |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 15 months | Every 4 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 6 MB | 140 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuantong Lu | Hirobumi Onishi |
In-app purchases
2357P
No in-app purchases
Sosu der
No in-app purchases
