# Zenn OTP vs OTEC

The clearest difference is device support: OTEC at 3 against Zenn OTP's 1. OTEC also leads on iOS requirement (14.0.0 vs 16.4). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Zenn OTP ships an update every 6 weeks, OTEC monthly. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Zenn OTP | OTEC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Size | 32 MB | 24 MB |
| Requires iOS | 16.4 | **14.0.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Zenn](https://appshunter.io/developer/1607161974) | [OTEC Präzisionsfinish GmbH](https://appshunter.io/developer/1860278470) |

## What reviewers say

### Zenn OTP

[App page](https://appshunter.io/ios/app/zenn-otp/id6443748609)

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

**In-app purchases:** none


### OTEC

[App page](https://appshunter.io/ios/app/otec/id6756361669)

**In-app purchases:** none


## Frequently asked questions

### Is Zenn OTP free?

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

### Is OTEC free?

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

### Do Zenn OTP or OTEC have ads?

Neither Zenn OTP nor OTEC shows ads.

### Which is updated more often, Zenn OTP or OTEC?

Zenn OTP ships an update every 6 weeks, and OTEC monthly. Most recently, Zenn OTP was updated on October 24, 2026 and OTEC on October 19, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*