# Secret Letter vs Stack Tower

The clearest difference is rating: Stack Tower at 5.0 against Secret Letter's 4.0. Stack Tower also leads on ratings volume (17 vs 1). Secret Letter's advantage is iOS requirement (12.0 vs 16.4). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Secret Letter sells 5 one-off in-app purchases and Stack Tower sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Stack Tower holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Stack Tower has 17 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Secret Letter ships an update every 6 days, Stack Tower every 5 days. The most recent releases landed on September 26, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Secret Letter | Stack Tower |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/secret-letter/id6469781760/reviews) | **[5.0 (17 ratings)](https://appshunter.io/ios/app/stack-tower-block-builder/id6756636822/reviews)** |
| Number of ratings | 1 | **17** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 6 days | **Every 5 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 135 MB | 59 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Maliyo Games](https://appshunter.io/developer/651410724) | [udictio](https://appshunter.io/developer/1772355196) |

## What reviewers say

### Secret Letter

[App page](https://appshunter.io/ios/app/secret-letter/id6469781760)

Become a word detective in a captivating noir world. Solve unique word puzzles and brain teasers to uncover clues and crack cases. Compete with friends and unlock new challenges.

**Highlights:** Engaging word puzzles, Captivating noir atmosphere, Daily challenges and rewards, Leaderboard competition, Unlockable cases and hints

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 20 tickets | $1.99 | one-time |
| 50Tickets | $4.99 | one-time |
| No more Ads | $4.99 | one-time |
| 100 Tickets | $9.99 | one-time |
| 200 Tickets | $19.99 | one-time |


### Stack Tower

[App page](https://appshunter.io/ios/app/stack-tower-block-builder/id6756636822)

This game offers a satisfying one-tap stacking challenge focused on precision and timing. Achieve perfect streaks with vibrant visual feedback and compete globally for high scores. Enjoy immersive visuals and inclusive design options.

**Highlights:** Satisfying "Perfect" Streaks, True Precision Gameplay, Aesthetic Immersion, Inclusive Design Options, Clutch Power-Ups (Undo, SlowMo, Revive, Solidify), Global Leaderboards

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Panic Bundle | $0.99 | one-time |
| 5 Undos | $0.99 | one-time |
| 5 Solidify | $0.99 | one-time |
| 5 Slow Motion | $0.99 | one-time |
| 15 Undos | $1.99 | one-time |
| 15 Solidify | $1.99 | one-time |
| 15 Slow Motion | $1.99 | one-time |
| 50 Undos | $4.99 | one-time |
| 50 Solidify | $4.99 | one-time |
| 50 Slow Motion | $4.99 | one-time |


## Frequently asked questions

### Is Secret Letter free?

Secret Letter is free to download, with in-app purchases available.

### Is Stack Tower free?

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

### Which has better reviews, Secret Letter or Stack Tower?

Stack Tower is rated higher. Secret Letter averages 4.0 out of 5 from 1 ratings, while Stack Tower averages 5.0 from 17 ratings.

### Do Secret Letter or Stack Tower have ads?

Both Secret Letter and Stack Tower show ads.

### Which is updated more often, Secret Letter or Stack Tower?

Secret Letter ships an update every 6 days, and Stack Tower every 5 days. Most recently, Secret Letter was updated on September 26, 2026 and Stack Tower on October 7, 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.*