# RainMark vs gaku

The clearest difference is in-app purchases: RainMark at none against gaku's 3. RainMark also leads on iOS requirement (12 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. gaku sells 3 in-app purchases, starting at $1.99 per month. RainMark asks for nothing beyond the download.

RainMark ships an update every 10 days, gaku every 3 weeks. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | RainMark | gaku |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/rainmark/id6751396538/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Free | — |
| Size | 69 MB | 21 MB |
| Requires iOS | **12** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [峻宏 刘](https://appshunter.io/developer/1834818077) | [MAMORU TAKANAMI](https://appshunter.io/developer/1867930874) |

## What reviewers say

### RainMark

[App page](https://appshunter.io/ios/app/rainmark/id6751396538)

Enhance your photos with professional watermark borders that automatically display shooting parameters. Choose from a variety of design templates and customize your signature and layout for a unique look. Export your creations in original quality with fast batch processing.

**Highlights:** Smart EXIF parameter reading, Professional design templates, Deep watermark customization, Signature support (text/image), Ultra-fast batch processing, Original quality export, Real-time preview

**Features:** Vision Pro support

**In-app purchases:** none


### gaku

[App page](https://appshunter.io/ios/app/gaku-photo-frames/id6792826254)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| gaku Premium Monthly | $1.99 | per month |
| gaku Premium Yearly | $14.99 | per year |
| gaku Premium Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is RainMark free?

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

### Is gaku free?

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

### Do RainMark or gaku have ads?

Neither RainMark nor gaku shows ads.

### Which is updated more often, RainMark or gaku?

RainMark ships an update every 10 days, and gaku every 3 weeks. Most recently, RainMark was updated on October 24, 2026 and gaku on October 29, 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.*