# Blocks Stack Puzzle vs Collect Letters!

The clearest difference is ads: Blocks Stack Puzzle at none against Collect Letters!'s shown. Blocks Stack Puzzle also leads on update cadence (every 10 days vs every 17 months) and iOS requirement (10.0 vs 12.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Blocks Stack Puzzle sells 2 one-off in-app purchases and Collect Letters! sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Blocks Stack Puzzle ships an update every 10 days, Collect Letters! every 17 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Blocks Stack Puzzle | Collect Letters! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (30 ratings)](https://appshunter.io/ios/app/blocks-stack-puzzle/id1575681456/reviews)** | — |
| Number of ratings | **30** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Every 17 months |
| Monetization | Free with in-app purchases | — |
| Size | 62 MB | 157 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vnstart LLC](https://appshunter.io/developer/1467854570) | [Rootcraft](https://appshunter.io/developer/1370994577) |

## What reviewers say

### Blocks Stack Puzzle

[App page](https://appshunter.io/ios/app/blocks-stack-puzzle/id1575681456)

A brain puzzle game where you fill empty cells by stacking colorful blocks in the correct orientation. It offers over 1000 levels, starting easy and progressively increasing in difficulty. Enjoy a minimalist 3D art design while challenging your mind.

**Highlights:** Fill empty cells with colorful blocks, Stack blocks in correct orientation, Over 1000 challenging levels, Minimalist 3D art design, Easy to play touch controls

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Unlock All | $0.99 | one-time |


### Collect Letters!

[App page](https://appshunter.io/ios/app/collect-letters/id6462407299)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3,000 Gems | $1.99 | one-time |
| 1,500 Cards | $1.99 | one-time |
| 1,000,000 Coins | $1.99 | one-time |
| 5,000 Gems | $2.99 | one-time |
| 8,000 Cards | $3.99 | one-time |
| 8,000 Gems | $3.99 | one-time |
| 16,000 Gems | $4.99 | one-time |
| 60,000 Cards | $5.99 | one-time |
| 50,000 Gems | $5.99 | one-time |
| 120,000 Gems | $6.99 | one-time |


## Frequently asked questions

### Is Blocks Stack Puzzle free?

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

### Is Collect Letters! free?

Collect Letters! is free to download, with in-app purchases available.

### Do Blocks Stack Puzzle or Collect Letters! have ads?

Collect Letters! shows ads; Blocks Stack Puzzle does not.

### Which is updated more often, Blocks Stack Puzzle or Collect Letters!?

Blocks Stack Puzzle ships an update every 10 days, and Collect Letters! every 17 months. Most recently, Blocks Stack Puzzle was updated on October 25, 2026 and Collect Letters! on October 27, 2026.

---

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