# GrainBook vs PatchDoc

The clearest difference is update cadence: PatchDoc at every 3 days against GrainBook's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. GrainBook sells 2 in-app purchases, starting at $4.99 per month and PatchDoc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

GrainBook ships an update every 2 weeks, PatchDoc every 3 days. The most recent releases landed on September 9, 2026 and September 1, 2026 respectively.

## The numbers

| Metric | GrainBook | PatchDoc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/patchdocfile-and-code-editor/id6763091539/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 155 MB | 35 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Yuan Long](https://appshunter.io/developer/1830417836) | [夏骏 倪](https://appshunter.io/developer/1892993247) |

## What reviewers say

### 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 |


### PatchDoc

[App page](https://appshunter.io/ios/app/patchdocfile-and-code-editor/id6763091539)

A versatile document editor and viewer for iPhone and iPad. Quickly edit text, code, and CSV files, preview PDFs and Office documents, and extract archives. Streamline your mobile file management.

**Highlights:** Text and code editing with syntax highlighting, CSV table browsing and editing, HTML source editing with live preview, PDF viewing with annotations, Preview for Office documents and images, Archive browsing and extraction

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 终身会员 | $0.99 | one-time |


## Frequently asked questions

### Is GrainBook free?

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

### Is PatchDoc free?

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

### Do GrainBook or PatchDoc have ads?

Neither GrainBook nor PatchDoc shows ads.

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

GrainBook ships an update every 2 weeks, and PatchDoc every 3 days. Most recently, GrainBook was updated on September 9, 2026 and PatchDoc on September 1, 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.*