# Folder Lock vs Yetter Air Adjust

The clearest difference is in-app purchases: Yetter Air Adjust at none against Folder Lock's 3. Yetter Air Adjust also leads on ads (none vs shown) and iOS requirement (12.2 vs 15.0). Folder Lock's advantage is update cadence (every 2 months vs every 11 months) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Folder Lock sells 3 in-app purchases, starting at $0.99 per 7 days. Yetter Air Adjust asks for nothing beyond the download.

Folder Lock ships an update every 2 months, Yetter Air Adjust every 11 months. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Folder Lock | Yetter Air Adjust |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (1.8K ratings)](https://appshunter.io/ios/app/folder-lock/id372925917/reviews)** | — |
| Number of ratings | **1.8K** | — |
| Positive reviews | 32.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 11 months |
| Monetization | Free with in-app purchases | — |
| Size | 67 MB | 182 MB |
| Requires iOS | 15.0 | **12.2** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 17+ | 4+ |
| Developer | [NewSoftwares.net](https://appshunter.io/developer/372925920) | [Yetter Farm Equipment](https://appshunter.io/developer/1809793773) |

## What reviewers say

### Folder Lock

[App page](https://appshunter.io/ios/app/folder-lock/id372925917)

Secure your private files, photos, videos, and sensitive information with password protection and encryption. This app also functions as a file manager, allowing wireless transfers and secure browsing, acting as a comprehensive tool for smartphone data security and privacy.

**Highlights:** Password-protect files and folders, Encrypt sensitive data, Secure private photos and videos, Wireless file transfer (PC/Mac), Password manager, Secure notes and wallet cards, Secure browser

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Folder Lock Weekly | $0.99 | per 7 days |
| Folder Lock Subscription | $39.99 | per year |
| Unlocked Feature Pack | $3.99 | one-time |

**What reviewers like**

- 🔒 Secure file storage
- 👍 Easy to use
- 🚀 Fast file transfers

**What reviewers complain about**

- 🐛 Crashes and freezes
- 💥 Data loss after updates
- 📢 Excessive ads and pop-ups
- 🔑 Password/login issues
- 🤯 Unreliable app performance

**Reported bugs**

- Photos and videos becoming corrupted or lost
- App crashing on launch or during use
- Login/password reset functionality not working
- Inability to access or transfer stored files

**Requested features**

- Ability to recover lost data
- Improved file management options
- Cross-device syncing capabilities
- Better customer support responsiveness


### Yetter Air Adjust

[App page](https://appshunter.io/ios/app/yetter-air-adjust/id1540969821)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Folder Lock free?

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

### Is Yetter Air Adjust free?

Yetter Air Adjust is free to download, with no in-app purchases.

### Do Folder Lock or Yetter Air Adjust have ads?

Folder Lock shows ads; Yetter Air Adjust does not.

### Which is updated more often, Folder Lock or Yetter Air Adjust?

Folder Lock ships an update every 2 months, and Yetter Air Adjust every 11 months. Most recently, Folder Lock was updated on October 12, 2026 and Yetter Air Adjust 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.*