Stack 8 vs Shape Theory
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Stack 8
Tap to perfectly stack pixels in this endless challenge. One mistake means losing a pixel. Test your reflexes and precision to keep stacking.
- Endless gameplay
- Precise tapping mechanics
- Pixel stacking challenge
- Reflex and precision testing
- Simple one-tap controls
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Stack 8 is endless! Tap to stack your pixels perfectly. One bad move and a pixel is gone. Stay sharp and keep stacking!
Shape Theory
Uncover hidden geometric shapes by strategically revealing parts of a concealed form. Deduce the correct shape from a list of suspects to advance through increasingly challenging levels. Compete globally for the top leaderboard spot.
- Shape discovery through limited reveals
- Strategic deduction of hidden forms
- Progressive difficulty levels
- Minimalist, captivating graphics
- Global leaderboard competition
- Brain teaser and strategy gameplay
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Master the art of perception in Shape Theory—a sleek, addictive puzzle game where strategy meets deduction. Uncover hidden geometrical forms buried beneath a mysterious surface and put your sharpest instincts to the test. Think you have what it takes? Dive into a labyrinth of shadow and shape. How to Play: 1. DISCOVERY: Tap the mysterious sand to reveal slices of the hidden shape. With only three glimpses allowed per round, every move is a calculated risk. Use them wisely! 2. DECISION: Analyze your findings. Once you’ve pieced together the clues, select the correct form from the five suspects below. Nail the deduction to advance. 3. ADVANCEMENT: As you progress, the mysteries grow more complex. Can you stay sharp as the challenge intensifies? Play it cool, minimize your clues, and maximize your score. Shape Theory features a minimalist aesthetic designed to keep you locked in the zone, focusing entirely on the puzzle at hand. Ready to prove your genius? Climb the global leaderboard, challenge your friends, and establish your dominance. It’s time to unleash your inner detective. Download Shape Theory and master the geometric unknown today. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Stack 8 at none against Shape Theory's shown. Stack 8 also leads on iOS requirement (16.0 vs 18.6). Shape Theory's advantage is update cadence (every 3 weeks vs every 4 months) and review sentiment (100% vs 80%). On price, in-app purchases, monetization model 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
Both are free to download. Stack 8 sells 2 one-off in-app purchases and Shape Theory sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Stack 8 ships an update every 4 months, Shape Theory every 3 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Stack 8 | Shape Theory |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (6 ratings) — better | — |
| Positive reviews | 80.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 6 — better | — |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 16.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 2 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | THE RISE COLLECTION | Bulltech |
Customer experience
Stack 8
Shape Theory
In-app purchases
Stack 8
- Unlock All$1.99
- Remove Ads$1.99
Shape Theory
- No Ads For 1 Month$0.991 Month
- No Ads For 1 Year$4.991 Year
- No Ads Forever$8.99
