# Tap to Solve vs Stack Star

The clearest difference is in-app purchases: Tap to Solve at none against Stack Star's 8. Tap to Solve also leads on iOS requirement (11.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Stack Star sells 8 one-off in-app purchases. Tap to Solve asks for nothing beyond the download.

Tap to Solve ships an update every 2 days, Stack Star daily. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Tap to Solve | Stack Star |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 days | **Daily** |
| Size | 111 MB | 287 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UNCOSOFT](https://appshunter.io/developer/1377644184) | [Moonstep Games](https://appshunter.io/developer/1827009450) |

## What reviewers say

### Tap to Solve

[App page](https://appshunter.io/ios/app/tap-to-solve/id1670572729)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stack Star

[App page](https://appshunter.io/ios/app/stack-star-color-sort/id6770474297)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Pack | $0.99 | one-time |
| 1000 Coins | $1.99 | one-time |
| 5000 Coins | $7.99 | one-time |
| No Ads | $7.99 | one-time |
| 10000 Coins | $14.99 | one-time |
| 25000 Coins | $29.99 | one-time |
| 50000 Coins | $59.99 | one-time |
| 100000 Coins | $89.99 | one-time |


## Frequently asked questions

### Is Tap to Solve free?

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

### Is Stack Star free?

Stack Star is free to download, with in-app purchases available.

### Do Tap to Solve or Stack Star have ads?

Both Tap to Solve and Stack Star show ads.

### Which is updated more often, Tap to Solve or Stack Star?

Tap to Solve ships an update every 2 days, and Stack Star daily. Most recently, Tap to Solve was updated on September 29, 2026 and Stack Star on October 3, 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.*