# Japan Ready Function vs Do Do Japanese Dictionary

The clearest difference is ads: Japan Ready Function at none against Do Do Japanese Dictionary's shown. Do Do Japanese Dictionary's advantage is update cadence (every 10 days vs every 6 months). On price, in-app purchases, device support 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.

Japan Ready Function ships an update every 6 months, Do Do Japanese Dictionary every 10 days. The most recent releases landed on October 2, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Japan Ready Function | Do Do Japanese Dictionary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 10 days** |
| Size | 51 MB | 199 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Career-Tech Japan Co.,LTD](https://appshunter.io/developer/1858175254) | [Myo Ko Ko](https://appshunter.io/developer/1896534961) |

## What reviewers say

### Japan Ready Function

[App page](https://appshunter.io/ios/app/japan-ready-function-lms/id6757743661)

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

**In-app purchases:** none


### Do Do Japanese Dictionary

[App page](https://appshunter.io/ios/app/do-do-japanese-dictionary/id6799780809)

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

**In-app purchases:** none


## Frequently asked questions

### Is Japan Ready Function free?

Japan Ready Function is free to download, with no in-app purchases.

### Is Do Do Japanese Dictionary free?

Do Do Japanese Dictionary is free to download, with no in-app purchases.

### Do Japan Ready Function or Do Do Japanese Dictionary have ads?

Do Do Japanese Dictionary shows ads; Japan Ready Function does not.

### Which is updated more often, Japan Ready Function or Do Do Japanese Dictionary?

Japan Ready Function ships an update every 6 months, and Do Do Japanese Dictionary every 10 days. Most recently, Japan Ready Function was updated on October 2, 2026 and Do Do Japanese Dictionary on September 30, 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.*