# O2Lock vs KISS Lock

The clearest difference is update cadence: KISS Lock at weekly against O2Lock's every 3 weeks. O2Lock's advantage is iOS requirement (12.0 vs 18.6). 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, KISS Lock weekly. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | O2Lock | KISS Lock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 30 MB | 3 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [One2Touch AS](https://appshunter.io/developer/1678046395) | [KISS Solutions LLC](https://appshunter.io/developer/6783896187) |

## What reviewers say

### O2Lock

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

**In-app purchases:** none


### KISS Lock

[App page](https://appshunter.io/ios/app/kiss-lock/id6783896185)

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

**In-app purchases:** none


## Frequently asked questions

### Is O2Lock free?

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

### Is KISS Lock free?

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

### Do O2Lock or KISS Lock have ads?

Neither O2Lock nor KISS Lock shows ads.

### Which is updated more often, O2Lock or KISS Lock?

O2Lock ships an update every 3 weeks, and KISS Lock weekly. Most recently, O2Lock was updated on October 24, 2026 and KISS Lock on October 28, 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.*