Serial 7s vs what happened next?
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.
what happened next?
Watch short video clips and guess how they end. Test your intuition and logic with unexpected twists. A fun, minimalistic game suitable for all ages.
- Watch and guess video endings
- Interactive video quiz
- Short clips with unexpected twists
- Test intuition and logic
- Suitable for all ages
- Minimalistic design
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Guess what happened next — interactive video quiz! Do you think you have good intuition? Watch the beginning of the video and choose how it all ended. Only one option is correct — are you ready to guess what happened next? Real videos. Unreal twists. Short clips with unexpected endings - Guess the outcome of events: funny, strange, shocking - Test yourself — can you predict the ending? Each video is a puzzle - Use logic, observation and a little intuition - From silly falls to cute surprises - anything can happen - Be careful: sometimes everything is not as it seems A game for everyone - Convenient to play with one hand - Suitable for all ages Relax and turn on your brain - Minimalistic style - No distracting details - focus on the essence - Each guess is a mini-challenge to your mind Download now - and try to guess! - Watch. Think. Choose. Win.
Screenshots
Verdict
Serial 7s and what happened next? are too close to call on the numbers: across 9 compared parameters — price, rating, ratings volume and update cadence among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
On the App Store both sit at effectively the same score — 5.0 for Serial 7s against 5.0 for what happened next?. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.
| Parameter | Serial 7s | what happened next? |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 5 months | Every 5 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 42 MB | 151 MB |
| Age rating | 9+ | 12+ |
| Developer | HFX Lab | Raul Davrishev |
Customer experience
Serial 7s
what happened next?
In-app purchases
Serial 7s
No in-app purchases
what happened next?
No in-app purchases
Questions
Is Serial 7s free?
Is what happened next? free?
Which has better reviews, Serial 7s or what happened next??
Do Serial 7s or what happened next? have ads?
Which is updated more often, Serial 7s or what happened next??
Other comparisons
