one digit addition vs Sosu der
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
one digit addition
Practice single-digit addition with this game. It features nine stages with random questions, offering a speed puzzle and search game experience. This is a lite version of a more comprehensive math app.
- Single-digit addition practice
- Speed puzzle game
- Search game mode
- Nine stages with random questions
- Lite version of a full math app
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This App "one digit +" is one digit addition training App. And this is a search game and speed puzzle game, too. There are 9 questions on nine stages, random 81 questions from "1 + 1 = 2" to "9 + 9 = 18". This is a Lite version of "one digit +-x÷". The paid full version has four categories. Addition:"one digit + ", subtraction:"one digit - ", multiplication:"one digit x " and division:"one digit ÷ ".
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: one digit addition at none against Sosu der's shown. one digit addition also leads on iOS requirement (8.0 vs 15.0). Sosu der's advantage is update cadence (every 4 months vs every 13 months). On price, 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.
one digit addition ships an update every 13 months, Sosu der every 4 months. The most recent releases landed on October 23, 2026 and October 17, 2026 respectively.
| Parameter | one digit addition | Sosu der |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 13 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 | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 4 MB | 140 MB |
| Age rating | 4+ | 4+ |
| Developer | Currach Software | Hirobumi Onishi |
In-app purchases
one digit addition
No in-app purchases
Sosu der
No in-app purchases
Questions
Is one digit addition free?
Is Sosu der free?
Do one digit addition or Sosu der have ads?
Which is updated more often, one digit addition or Sosu der?
Other comparisons
