# MiiTrans vs GrainBook

The clearest difference is iOS requirement: GrainBook at 16.4 against MiiTrans's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. MiiTrans sells 2 one-off in-app purchases and GrainBook sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | MiiTrans | GrainBook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (28 ratings)](https://appshunter.io/ios/app/miitrans-ai-translate/id6749005255/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 78.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 25 MB | 155 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [宏基 庄](https://appshunter.io/developer/1563608338) | [Yuan Long](https://appshunter.io/developer/1830417836) |

## What reviewers say

### MiiTrans

[App page](https://appshunter.io/ios/app/miitrans-ai-translate/id6749005255)

This AI-powered tool offers instant translations for text, voice, images, and documents. It features a chat-style interface, comparative translation options, and robust offline capabilities. Seamlessly integrate it into your system for cross-language communication and learning.

**Highlights:** AI-powered translation, Text, voice, image, and document translation, Offline translation capabilities, Comparative translation engine, Interactive chat-style interface, iCloud sync across devices

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MiiTrans Pro | Free | one-time |
| MiiTrans Pro | $6.99 | one-time |


### GrainBook

[App page](https://appshunter.io/ios/app/grainbook-ai-content-reader/id6754638202)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grainbook Go (1-Month) | $4.99 | per month |
| Grainbook Go (12-Months) | $44.99 | per year |


## Frequently asked questions

### Is MiiTrans free?

MiiTrans is free to download, with in-app purchases available.

### Is GrainBook free?

GrainBook is free to download, with in-app purchases available.

### Do MiiTrans or GrainBook have ads?

Neither MiiTrans nor GrainBook shows ads.

### Which is updated more often, MiiTrans or GrainBook?

MiiTrans ships an update every 2 weeks, and GrainBook every 2 weeks. Most recently, MiiTrans was updated on November 5, 2026 and GrainBook on October 12, 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.*