# Shape Theory vs UntangleAway

The clearest difference is in-app purchases: UntangleAway at none against Shape Theory's 3. UntangleAway also leads on iOS requirement (13.0 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Shape Theory sells 3 in-app purchases, starting at $0.99 per month. UntangleAway asks for nothing beyond the download.

Shape Theory ships an update every 3 weeks, UntangleAway monthly. The most recent releases landed on September 9, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Shape Theory | UntangleAway |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 102 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bulltech](https://appshunter.io/developer/1586482702) | [Barbara Reyes Talavera](https://appshunter.io/developer/1835148270) |

## What reviewers say

### Shape Theory

[App page](https://appshunter.io/ios/app/shape-theory-brain-puzzles/id6449924079)

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.

**Highlights:** Shape discovery through limited reveals, Strategic deduction of hidden forms, Progressive difficulty levels, Minimalist, captivating graphics, Global leaderboard competition, Brain teaser and strategy gameplay

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads For 1 Month | $0.99 | per month |
| No Ads For 1 Year | $4.99 | per year |
| No Ads Forever | $8.99 | one-time |


### UntangleAway

[App page](https://appshunter.io/ios/app/untangleaway/id6752520909)

**In-app purchases:** none


## Frequently asked questions

### Is Shape Theory free?

Shape Theory is free to download, with in-app purchases available.

### Is UntangleAway free?

UntangleAway is free to download, with no in-app purchases.

### Do Shape Theory or UntangleAway have ads?

Both Shape Theory and UntangleAway show ads.

### Which is updated more often, Shape Theory or UntangleAway?

Shape Theory ships an update every 3 weeks, and UntangleAway monthly. Most recently, Shape Theory was updated on September 9, 2026 and UntangleAway on September 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*