# O vs Nagara 読み上げ

The clearest difference is update cadence: Nagara 読み上げ at every 3 days against O's every 3 weeks. O's advantage is iOS requirement (15.6 vs 18.0). 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.

O ships an update every 3 weeks, Nagara 読み上げ every 3 days. The most recent releases landed on October 4, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | O | Nagara 読み上げ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 16 MB | 1 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [O-TECH JAPAN](https://appshunter.io/developer/1219186631) | [Masayuki Yamaji](https://appshunter.io/developer/1270013649) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-techmobile/id1246072028)

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

**In-app purchases:** none


### Nagara 読み上げ

[App page](https://appshunter.io/ios/app/nagara/id6787424622)

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

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is Nagara 読み上げ free?

Nagara 読み上げ is free to download, with no in-app purchases.

### Do O or Nagara 読み上げ have ads?

Neither O nor Nagara 読み上げ shows ads.

### Which is updated more often, O or Nagara 読み上げ?

O ships an update every 3 weeks, and Nagara 読み上げ every 3 days. Most recently, O was updated on October 4, 2026 and Nagara 読み上げ on October 5, 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.*