# O2Lock vs Zctower

The clearest difference is update cadence: Zctower at weekly against O2Lock's every 3 weeks. 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, Zctower weekly. The most recent releases landed on September 16, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | O2Lock | Zctower |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zctower/id6504358858/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 30 MB | 43 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [One2Touch AS](https://appshunter.io/developer/1678046395) | [福州正城铅封有限公司](https://appshunter.io/developer/1701770318) |

## What reviewers say

### O2Lock

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

**In-app purchases:** none


### Zctower

[App page](https://appshunter.io/ios/app/zctower/id6504358858)

Control smart lock terminal devices remotely. Manage unlocking, locking, key settings, and permissions wirelessly. Collect data from your devices.

**Highlights:** Wireless device control, Unlocking and locking, Key setting, Permission management, Data collection

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is O2Lock free?

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

### Is Zctower free?

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

### Do O2Lock or Zctower have ads?

Neither O2Lock nor Zctower shows ads.

### Which is updated more often, O2Lock or Zctower?

O2Lock ships an update every 3 weeks, and Zctower weekly. Most recently, O2Lock was updated on September 16, 2026 and Zctower on June 1, 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.*