# iodyne vs App Lock

The clearest difference is in-app purchases: iodyne at none against App Lock's 3. iodyne also leads on ratings volume (5 vs 1). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. App Lock sells 3 in-app purchases, starting at $0.99 per month. iodyne asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for iodyne against 5.0 for App Lock. That said, the two scores are not equally well evidenced: iodyne has 5 ratings behind it against 1, so its average is the more settled of the two.

iodyne ships an update every 3 weeks, App Lock every 2 weeks. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | iodyne | App Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/iodyne/id6740823814/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/app-lock-lockstead/id6791830193/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | **Free** | Freemium |
| Size | 50 MB | 10 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [iodyne, LLC](https://appshunter.io/developer/1791786091) | [桥 王](https://appshunter.io/developer/1854268559) |

## What reviewers say

### iodyne

[App page](https://appshunter.io/ios/app/iodyne/id6740823814)

Manage and monitor your storage devices with this utility app. Unlock iodyne drives using passkeys and scan NFC tags for other devices. Track file transfers and view workflow metadata in real-time.

**Highlights:** Unlock iodyne drives with passkeys, Scan NFC tags for non-iodyne drives, View device provisioning metadata, Monitor file transfers in real-time, Manage workflow metadata

**In-app purchases:** none


### App Lock

[App page](https://appshunter.io/ios/app/app-lock-lockstead/id6791830193)

This app acts as a privacy guard and app locker for your iPhone or iPad, allowing you to select specific apps to protect with a PIN. It offers flexible rules like category blocking and guest mode, ensuring your device remains secure when shared.

**Highlights:** On-device app locking, PIN protection, Category and allow-only rules, Guest Mode, Scheduled protection windows, Face ID/Touch ID unlock, Privacy-focused design

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lockstead VIP Monthly | $0.99 | per month |
| Lockstead VIP Yearly | $4.99 | per year |
| Lockstead Lifetime VIP | $7.99 | one-time |


## Frequently asked questions

### Is iodyne free?

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

### Is App Lock free?

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

### Which has better reviews, iodyne or App Lock?

iodyne and App Lock are both rated 5.0 out of 5 on the App Store, from 5 and 1 ratings respectively.

### Do iodyne or App Lock have ads?

Neither iodyne nor App Lock shows ads.

### Which is updated more often, iodyne or App Lock?

iodyne ships an update every 3 weeks, and App Lock every 2 weeks. Most recently, iodyne was updated on October 28, 2026 and App Lock 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.*