1s Speed Math vs Chess CT
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
1s Speed Math
Test your mental math skills with this fast-paced game. You have only one second to select the correct answer to reach a high score and challenge your friends. It's a quick and engaging way to improve your arithmetic abilities.
- One-second answer time
- High score tracking
- Challenge friends
- Improve arithmetic skills
- Quick gameplay
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Instructions: - You have only one second to choose correct answer - Reach high score - Beat your friends
Chess CT
This logic puzzle game challenges players to rotate a cube and match numbers on all sides. It offers multiple levels and versions for different age groups, including a free 5x5 version and a version for young children learning numbers.
- Multi-level rotational puzzle
- Match numbers at all angles
- Cube rotation gameplay
- Versions for different age groups
- Introduces numbers in multiple languages
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Chess CT is multi-level version of CT puzzle. Rotate as Rubik's cube and match numbers at all angles (projections). Free 5x5 version at 4 projections is on App Store as Touch CT. Free 4x4 version at 2 projection is available as CT Kids (age 5+, player should be able to recognize numbers and count 1-4). Kids Num introduces to the first numbers in 3 languages (0+).
Screenshots
Verdict
The clearest difference is rating: Chess CT at 5.0 against 1s Speed Math's 2.0. Chess CT also leads on update cadence (every 4 months vs every 9 months). 1s Speed Math's advantage is iOS requirement (12.0 vs 14.5). On price, ratings volume, ads and in-app purchases 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.
Chess CT holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
1s Speed Math ships an update every 9 months, Chess CT every 4 months. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.
| Parameter | 1s Speed Math | Chess CT |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (2 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 9 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 14.5 |
| Further details — not scored | ||
| Size | 14 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Atoapps | Igor Patrikeev |
Customer experience
1s Speed Math
Chess CT
In-app purchases
1s Speed Math
No in-app purchases
Chess CT
No in-app purchases
