# Letter Together vs App Lock

The clearest difference is in-app purchases: Letter Together at none against App Lock's 8. Letter Together also leads on ads (none vs shown) and iOS requirement (9.0 vs 16.0). On price, update cadence and device support there is nothing between them.

Both are free to download. App Lock sells 5 in-app purchases, starting at $4.99 per month. Letter Together asks for nothing beyond the download.

Letter Together ships an update monthly, App Lock every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Letter Together | App Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (1.3K ratings)](https://appshunter.io/ios/app/app-lock-applock-apps/id6452721618/reviews)** |
| Number of ratings | — | **1.3K** |
| Positive reviews | — | 75.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 58 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Continuum Games, Inc.](https://appshunter.io/developer/1571872555) | [俊杰 刘](https://appshunter.io/developer/1634755293) |

## What reviewers say

### Letter Together

[App page](https://appshunter.io/ios/app/letter-together/id1603814059)

**Features:** macOS Compatibility

**In-app purchases:** none


### App Lock

[App page](https://appshunter.io/ios/app/app-lock-applock-apps/id6452721618)

Secure your personal privacy by locking any app with a password. This app also offers parental controls to monitor child's phone activity, prevent app deletion, and restrict new installations. Enhance your device's security by restricting account and password changes.

**Highlights:** App Lock, Password Lock, Parental Controls, Prevent App Deletion, Disable New App Installation, Restrict Account Changes

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $4.99 | per month |
| Monthly Membership | $7.99 | per month |
| Yearly Membership | $9.99 | per year |
| Yearly Membership | $19.99 | per year |
| Lifetime Membership | $34.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🔒 Secure app locking
- 🚀 Efficient performance
- 💕 Provides peace of mind

**What reviewers complain about**

- 🐛 Occasional issues with app unlocking
- 🔒 Concerns about settings changes
- ⚠️ Potential to lock out users

**Reported bugs**

- Locked apps not showing in settings
- Missed calls and messages when app is locked

**Requested features**

- Paid version with more features
- Ability to lock more than 50 apps


## Frequently asked questions

### Is Letter Together free?

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

### Is App Lock free?

App Lock is free to download, with in-app purchases available.

### Do Letter Together or App Lock have ads?

App Lock shows ads; Letter Together does not.

### Which is updated more often, Letter Together or App Lock?

Letter Together ships an update monthly, and App Lock every 3 weeks. Most recently, Letter Together was updated on October 25, 2026 and App Lock on October 25, 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.*