# Letter Head! vs Lock Shape

The clearest difference is in-app purchases: Lock Shape at none against Letter Head!'s 4. Letter Head!'s advantage is ads (none vs shown) and update cadence (fortnightly vs every 20 months). On price, review sentiment and device support there is nothing between them.

Both are free to download. Letter Head! sells 4 one-off in-app purchases. Lock Shape asks for nothing beyond the download.

Letter Head! ships an update fortnightly, Lock Shape every 20 months. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Letter Head! | Lock Shape |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/letter-head/id1563840062/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 20 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 60 MB | 12 MB |
| Requires iOS | **12.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Horse Arms LLC](https://appshunter.io/developer/1563840064) | [kunal rameshbhai](https://appshunter.io/developer/1117340195) |

## What reviewers say

### Letter Head!

[App page](https://appshunter.io/ios/app/letter-head/id1563840062)

Challenge your vocabulary by finding words that contain specific three-letter combinations. Progress through over 5000 unique puzzles with adjustable difficulty. Earn hints and bonuses as you play, with no time limits.

**Highlights:** Find words with given 3 letters, Over 5000 unique puzzles, Adjustable difficulty levels, Earn hints and bonuses, No time limits, Daily challenges and bonuses, Offline play

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Gems | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |
| 1000 Gems | $6.99 | one-time |
| 10000 Gems | $29.99 | one-time |


### Lock Shape

[App page](https://appshunter.io/ios/app/lock-shape/id6450044382)

Test your reflexes and focus in this challenging shape-matching game. Spin the octagon to align with incoming shapes and aim for the highest score. It's easy to learn but incredibly difficult to master, offering an addictive experience.

**Highlights:** Shape matching gameplay, Precision tapping controls, High score challenges, Addictive gameplay loop, Free to play

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

**In-app purchases:** none


## Frequently asked questions

### Is Letter Head! free?

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

### Is Lock Shape free?

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

### Do Letter Head! or Lock Shape have ads?

Lock Shape shows ads; Letter Head! does not.

### Which is updated more often, Letter Head! or Lock Shape?

Letter Head! ships an update fortnightly, and Lock Shape every 20 months. Most recently, Letter Head! was updated on October 7, 2026 and Lock Shape on October 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.*