# App Lock vs Vienna SOS

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

Both are free to download. App Lock sells 6 in-app purchases, starting at $4.99 per month and Vienna SOS sells 4 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

App Lock ships an update fortnightly, Vienna SOS daily. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | App Lock | Vienna SOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (5.3K ratings)](https://appshunter.io/ios/app/app-lock/id6448239603/reviews)** | — |
| Number of ratings | **5.3K** | — |
| Positive reviews | 57.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Daily** |
| Monetization | Subscription | — |
| Size | 43 MB | 32 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Lilucat](https://appshunter.io/developer/1676061700) | [Elshan Musayev](https://appshunter.io/developer/6807975176) |

## What reviewers say

### App Lock

[App page](https://appshunter.io/ios/app/app-lock/id6448239603)

Secure your sensitive applications and personal data with this privacy tool. Easily lock any app to prevent unauthorized access and keep your information out of sight from prying eyes. Enjoy enhanced device security and peace of mind.

**Highlights:** Lock any application, Hide sensitive apps, Block websites, Intuitive interface, Prevent unauthorized access, Enhance device privacy

**Features:** Family Sharing

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| App Lock | $4.99 | per month |
| App Lock | $7.99 | per 7 days |
| App Lock | $9.99 | per month |
| App Lock | $14.99 | per year |
| App Locker for iPhone | $29.99 | per year |
| App Lock | $59.99 | one-time |

**What reviewers like**

- 👍 Helpful app
- 🔒 Provides app security
- 🔒 Locks apps with Face ID/Touch ID/PIN
- 👍 Great for keeping private information secure
- 👍 Useful for parents to restrict child access

**What reviewers complain about**

- 🐛 Home screen layout gets scrambled when app is turned off
- 🐛 App Blocker resets widget stacks
- 💰 Aggressive subscription push
- 🔒 Locked apps only unlocked for a limited time
- 🐛 Doesn't persist app blocking across phone restarts

**Reported bugs**

- Buttons at the bottom of the screen are inaccessible on some devices
- Prompts are not legible with larger font settings
- Locked apps can still be accessed by restarting the phone

**Requested features**

- Allow concealing the app locker
- Add scheduling/time-based locking
- Provide separate unlock code from phone passcode
- Improve usability when Dynamic Island is in use


### Vienna SOS

[App page](https://appshunter.io/ios/app/vienna-sos/id6816336311)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Monthly | $12.99 | per month |
| Premium Monthly | $34.99 | per month |
| Basic — one analysis | $3.99 | one-time |
| Premium — one analysis | $11.99 | one-time |


## Frequently asked questions

### Is App Lock free?

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

### Is Vienna SOS free?

Vienna SOS is free to download, with in-app purchases available.

### Do App Lock or Vienna SOS have ads?

App Lock shows ads; Vienna SOS does not.

### Which is updated more often, App Lock or Vienna SOS?

App Lock ships an update fortnightly, and Vienna SOS daily. Most recently, App Lock was updated on November 7, 2026 and Vienna SOS on October 31, 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.*