Serial 7s vs ColorBlox
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Serial 7s
This game challenges you to rapidly subtract 7 from a starting number until you can no longer continue. It's based on a cognitive test used to assess attention and memory, with consistent play potentially improving brain skills and helping to prevent cognitive decline.
- Serial 7 subtraction gameplay
- Tests attention and memory
- Helps prevent cognitive decline
- Measures subtraction speed
- Randomized starting numbers
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Serial 7s is a brain training game that tests how fast you can perform continuous subtraction of 7 from a starting number. Inspired by the classic "Serial 7s" task—a standard component of the Mini-Mental State Examination (MMSE)—this game gives a proven cognitive test a fresh twist. Starting with a randomly generated number between 99 and 105, your total time to complete 14 consecutive subtractions of 7 is measured. Serial subtraction by 7 is widely used to evaluate focus, attention span, and working memory. Regular practice can help sharpen your mind and boost cognitive fitness. Recommended for anyone interested in brain training, keeping their mind active, or supporting long-term cognitive health and dementia prevention.
ColorBlox
A colorful puzzle game that challenges players to match a target grid by selecting colored shapes. It offers a relaxing yet engaging experience suitable for all ages, perfect for quick sessions or extended play.
- Brain-teasing puzzles
- Classic puzzle mechanics
- Fresh, colorful twist
- Relaxing and challenging gameplay
- Suitable for all ages
- Multiple levels
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Dive into the vibrant world of ColorBlox, the ultimate brain-teasing experience! Perfect for puzzle enthusiasts of all ages, ColorBlox combines the simplicity of classic puzzles with a fresh, colorful twist. Select the colored shapes and try to get the same grid as the target. Whether you have a few minutes or a few hours, ColorBlox offers the perfect blend of relaxation and challenge. Download now and start your colorful journey to becoming a puzzle master! Download ColorBlox today and see how many levels you can conquer!
Screenshots
Verdict
The clearest difference is update cadence: ColorBlox at every 5 days against Serial 7s's every 5 months. On price, ads, in-app purchases and monetization model 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.
Serial 7s ships an update every 5 months, ColorBlox every 5 days. The most recent releases landed on October 20, 2026 and October 30, 2026 respectively.
| Parameter | Serial 7s | ColorBlox |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 months | Every 5 days — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 42 MB | 95 MB |
| Age rating | 9+ | 4+ |
| Developer | HFX Lab | BananaBlox |
Customer experience
Serial 7s
ColorBlox
In-app purchases
Serial 7s
No in-app purchases
ColorBlox
No in-app purchases
