Comparison

Mathstack vs Sky Run

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

Head to head
About

Mathstack

A unique number puzzle game where you stack cards to form sequences. Strategically use temporary slots to clear the board and uncover hidden cards. Offers three difficulty levels for a tailored challenge.

Highlights
  • Sequence building gameplay
  • Strategic card stacking
  • Temporary slot management
  • Three difficulty levels
  • Uncover hidden cards
Features
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Mathstack - Sequence Puzzle Love number puzzles? This one's different. Stack your way to victory by building sequences from 1 to 15 (or 15 to 1) across five colorful stacks to clear the board. The catch? There are more cards than space on the board. Think ahead, use your temporary slots wisely, and plan your moves to uncover the cards you need. Three difficulty levels to match your mood: - Easy (1-5) for a quick brain break - Medium (1-10) for a solid challenge - Hard (1-15) for number-crunching pros Simple to learn. Tricky to master. Impossible to put down. Terms of Service: https://hazerim.com/terms-of-service/ Privacy Policy: https://hazerim.com/mathstack/privacy-policy/

About

Sky Run

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*** Sky Run – Across Twisted Paths *** A playful race unfolds high in the sky! Twist, jump, and roll along ever-changing paths. Every leap feels like a tiny adventure, and the paths keep you guessing at every step. Follow the path and discover how far it takes you. *** How to Play *** - Tap to jump - Tap and hold to jump farther *** Thank you so much for playing! We appreciate your support!! ***

Screenshots

Mathstack4 screens
Sky Run4 screens

Verdict

The call

The clearest difference is device support: Sky Run at 3 against Mathstack's 1. Sky Run also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Mathstack sells 3 in-app purchases, starting at $1.99 per 7 days and Sky Run sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Mathstack ships an update every 11 days, Sky Run weekly. The most recent releases landed on June 27, 2026 and September 14, 2026 respectively.

Scorecard2 real differences · 7 level
Mathstack versus Sky Run: the parameters behind the verdict, then further details
ParameterMathstackSky Run
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 11 daysWeekly — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size31 MB331 MB
Age rating12+4+
DeveloperHazerim Interactive Entertainment, UABJIN HWAN KIM

In-app purchases

3 purchases

Mathstack

Subscriptions2
  • No Ads (Weekly)3 Days trial$1.997 Days
  • No Ads (Monthly)$5.991 Month
One-time1
  • No Ads (Lifetime)$19.99
8 purchases

Sky Run

One-time8
  • Aveline$2.99
  • Isabeau$2.99
  • Rowena$2.99
Show 5 more
  • Lyra$2.99
  • Arwen$3.99
  • Coraline$3.99
  • Selene$3.99
  • Zinnia$4.99

Questions

Is Mathstack free?
Mathstack is free to download, with in-app purchases available.
Is Sky Run free?
Sky Run is free to download, with in-app purchases available.
Do Mathstack or Sky Run have ads?
Both Mathstack and Sky Run show ads.
Which is updated more often, Mathstack or Sky Run?
Mathstack ships an update every 11 days, and Sky Run weekly. Most recently, Mathstack was updated on June 27, 2026 and Sky Run on September 14, 2026.

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