# O.Tech vs Resonote

The clearest difference is update cadence: Resonote at every 10 days against O.Tech's every 7 months. Resonote also leads on device support. On price, in-app purchases and iOS requirement there is nothing between them.

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

O.Tech ships an update every 7 months, Resonote every 10 days. The most recent releases landed on October 6, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | O.Tech | Resonote |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 7 months | **Every 10 days** |
| Size | 13 MB | 21 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [EP spa](https://appshunter.io/developer/1688557966) | [Bas Spijkerman](https://appshunter.io/developer/6792361856) |

## What reviewers say

### O.Tech

[App page](https://appshunter.io/ios/app/otech/id6449295462)

**In-app purchases:** none


### Resonote

[App page](https://appshunter.io/ios/app/resonote-spectrum-analyzer/id6804463455)

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

**In-app purchases:** none


## Frequently asked questions

### Is O.Tech free?

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

### Is Resonote free?

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

### Which is updated more often, O.Tech or Resonote?

O.Tech ships an update every 7 months, and Resonote every 10 days. Most recently, O.Tech was updated on October 6, 2026 and Resonote on October 21, 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.*