# O2Lock vs smark lock

The clearest difference is update cadence: O2Lock at every 3 weeks against smark lock's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

O2Lock ships an update every 3 weeks, smark lock every 4 months. The most recent releases landed on September 16, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | O2Lock | smark lock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Size | 30 MB | 40 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [One2Touch AS](https://appshunter.io/developer/1678046395) | [震 王](https://appshunter.io/developer/1734329851) |

## What reviewers say

### O2Lock

[App page](https://appshunter.io/ios/app/o2lock/id6478984927)

**In-app purchases:** none


### smark lock

[App page](https://appshunter.io/ios/app/smark-lock/id6752854176)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is O2Lock free?

O2Lock is free to download, with no in-app purchases.

### Is smark lock free?

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

### Do O2Lock or smark lock have ads?

Neither O2Lock nor smark lock shows ads.

### Which is updated more often, O2Lock or smark lock?

O2Lock ships an update every 3 weeks, and smark lock every 4 months. Most recently, O2Lock was updated on September 16, 2026 and smark lock on September 9, 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.*