# OK.secure vs ZERO Messenger

The clearest difference is update cadence: ZERO Messenger at weekly against OK.secure's every 6 weeks. ZERO Messenger also leads on monetization model (free vs free with in-app purchases) and review sentiment (78% vs 58%). OK.secure's advantage is iOS requirement (16.6 vs 18.5). 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.

OK.secure ships an update every 6 weeks, ZERO Messenger weekly. The most recent releases landed on September 19, 2026 and July 8, 2026 respectively.

## The numbers

| Metric | OK.secure | ZERO Messenger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (15 ratings)](https://appshunter.io/ios/app/zero-messenger/id6476882926/reviews)** |
| Number of ratings | — | **15** |
| Positive reviews | 58.3% of reviews | **77.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 100 MB | 248 MB |
| Requires iOS | **16.6** | 18.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [OK.de Services GmbH](https://appshunter.io/developer/1692149044) | [Zero to Infinity, Inc.](https://appshunter.io/developer/1728066651) |

## What reviewers say

### OK.secure

[App page](https://appshunter.io/ios/app/oksecure/id1518785117)

This app offers private, end-to-end encrypted messaging and a secure crypto wallet. Communicate freely with voice, video calls, and file sharing, all protected by blockchain technology and a zero-knowledge principle. Manage your digital assets with integrated DeFi features.

**Highlights:** End-to-end encrypted messaging, Voice and video calls, File and screen sharing, Non-custodial crypto wallet, DeFi and crypto trading, Blockchain technology

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

**In-app purchases:** none


### ZERO Messenger

[App page](https://appshunter.io/ios/app/zero-messenger/id6476882926)

A secure and private messaging app built on decentralized architecture. It offers end-to-end encryption, Web3 integration, and no ads or surveillance. Reclaim your digital rights with this free, anonymous communication tool.

**Highlights:** Decentralized architecture, End-to-end encryption, Web3 wallet login, Token-gated chats, Cross-device access, No phone number required, Sleek and minimal design

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OK.secure free?

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

### Is ZERO Messenger free?

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

### Do OK.secure or ZERO Messenger have ads?

Neither OK.secure nor ZERO Messenger shows ads.

### Which is updated more often, OK.secure or ZERO Messenger?

OK.secure ships an update every 6 weeks, and ZERO Messenger weekly. Most recently, OK.secure was updated on September 19, 2026 and ZERO Messenger on July 8, 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.*