PrimePath vs Sosu der
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
PrimePath
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一筆書きと素因数分解を組み合わせたパズルゲームです。 与えられた数を素因数分解し、その因数全てを一筆書きで辿れるルートを探しましょう！ 制限時間60秒以内にできるだけたくさんの問題を解決し、スコアを稼ぎましょう！
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 update cadence: PrimePath at every 3 days against Sosu der's every 4 months. PrimePath also leads on iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and device support 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.
PrimePath ships an update every 3 days, Sosu der every 4 months. The most recent releases landed on December 19, 2025 and September 13, 2026 respectively.
| Parameter | PrimePath | Sosu der |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days — better | Every 4 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 97 MB | 140 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuki Wakabayashi | Hirobumi Onishi |
In-app purchases
PrimePath
No in-app purchases
Sosu der
No in-app purchases
