Comparison

Serial 7s vs Sky Sprint

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Serial 7 subtraction gameplay
  • Tests attention and memory
  • Helps prevent cognitive decline
  • Measures subtraction speed
  • Randomized starting numbers
Features
Read full description

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.

About

Sky Sprint

Features
Read full description

Sky Sprint – Neon Speed. No Mercy. Dash through an endless synthwave track filled with shifting tiles and sudden gaps. The speed is relentless, the colors are electric, and one wrong move ends your run. Swipe, Dodge, Survive You’re always sprinting — all you control is your direction. Swipe left or right to stay on the path. Miss? You're done. Every Second Gets Harder The track vanishes behind you, gaps appear faster, and the tempo rises. The better you get, the more brutal it becomes.  Addictive by Design Instant retries. No loading. No nonsense. Just one more run… and then another. Retro Future Style With bold neon colors, glowing tiles, and pulsing synth beats, this game feels like an arcade machine from the future.  Game Features: * Swipe to move left or right * Fast-paced, endless synthwave runner * Sudden gaps and collapsing paths * Instant restarts and non-stop action * Stylized neon visuals & retro ambiance * Leaderboards for competitive play

Screenshots

Serial 7s4 screens
Sky Sprint4 screens

Verdict

The call

The clearest difference is iOS requirement: Sky Sprint at 13.0 against Serial 7s's 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 8 level
Serial 7s versus Sky Sprint: the parameters behind the verdict, then further details
ParameterSerial 7sSky Sprint
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 5 months—
AdsYesYes
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size42 MB126 MB
Age rating9+4+
DeveloperHFX LabFATCAT GAMES LLC

In-app purchases

None

Serial 7s

No in-app purchases

None

Sky Sprint

No in-app purchases

Questions

Is Serial 7s free?
Serial 7s is free to download, with no in-app purchases.
Is Sky Sprint free?
Sky Sprint is free to download, with no in-app purchases.
Do Serial 7s or Sky Sprint have ads?
Both Serial 7s and Sky Sprint show ads.

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