# 耳から覚える N3 vs osmGradus

The clearest difference is ads: osmGradus at none against 耳から覚える N3's shown. 耳から覚える N3's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 耳から覚える N3 | osmGradus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 days | Every 2 days |
| Size | 108 MB | 25 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yuta Takehara](https://appshunter.io/developer/1688827032) | [Osamu Ushikubo](https://appshunter.io/developer/1883307303) |

## What reviewers say

### 耳から覚える N3

[App page](https://appshunter.io/ios/app/n3-n1/id6466640018)

**Features:** macOS Compatibility

**In-app purchases:** none


### osmGradus

[App page](https://appshunter.io/ios/app/osmgradus/id6790787972)

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

**In-app purchases:** none


## Frequently asked questions

### Is 耳から覚える N3 free?

耳から覚える N3 is free to download, with no in-app purchases.

### Is osmGradus free?

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

### Do 耳から覚える N3 or osmGradus have ads?

耳から覚える N3 shows ads; osmGradus does not.

### Which is updated more often, 耳から覚える N3 or osmGradus?

耳から覚える N3 ships an update every 2 days, and osmGradus every 2 days. Most recently, 耳から覚える N3 was updated on October 27, 2026 and osmGradus on October 31, 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.*