# RoboTou Stacker — On-device image stacking

> On-device photo stacking for landscapes, star trails, and light trails. (iPhone/iPad app by 振国 吴.)

- Source: https://appshunter.io/ios/app/robotou-stacker/id6761755082 (this page in markdown: same URL + `.md`)
- Developer: [振国 吴](https://appshunter.io/developer/1739933647)
- Category: Photo & Video
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 88 MB
- Languages: American English
- Released: 2026-04-13
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/robotou-stacker/id6761755082/reviews.md

## What is RoboTou Stacker?

RoboTou Stacker brings precision image stacking and on-device AI star removal to iPhone and iPad.

Choose a workflow for your photography:

• Starry Sky Stack — Align and combine night-sky photos for cleaner, more detailed results.
• Landscape Stack — Reduce noise and improve landscape images through multi-frame stacking.
• Star & Light Trails — Create star-trail and car-light-trail images.
• Star Trail Pro — Produce advanced star-trail results with additional processing options.
• AI Star Removal — Remove stars from a single image using an on-device Core ML model.

KEY FEATURES

• Import images from Photos or Files
• Automatic masking and image alignment
• 4K and 1080p output resolution options
• Local preview generation and project management
• Export finished images back to Photos
• On-device processing—your source images do not need to be uploaded

ROBOTOU PRO

Landscape Stack and Star & Light Trails remain available for free. RoboTou Pro unlocks Starry Sky Stack, Star Trail Pro, and AI Star Removal through an annual subscription or a one-time lifetime purchase.

Privacy Policy: https://www.robotou.cn/robotou-stacker-ios-privacy/
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- On-device image stacking
- Automatic masking and alignment
- Starry sky stacking
- Star trail stacking
- Car-light trail stacking
- Local preview generation
- Export to Photos

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| RoboTou Stacker Pro Annual | $5.00 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| RoboTou Stacker Pro Lifetime | $25.00 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/robotou-stacker/id6761755082/reviews.md

### 5/5 — Amazing star stacking app!

*2026-04-14*

A very good tool that can stack starry sky photos directly on your phone, and it's very easy to use. Awesome, I really like this app.

## Frequently asked questions about RoboTou Stacker

### What is RoboTou Stacker used for?

RoboTou Stacker is used to combine multiple photos into cleaner stacked results, ideal for capturing starry skies, landscapes, star trails, or car-light trails directly on your iPhone and iPad.

### Does RoboTou Stacker require an internet connection?

No, RoboTou Stacker is designed for on-device processing and does not require an account registration or cloud sync for its core workflows, meaning you can use it offline.

### What types of stacking workflows does RoboTou Stacker support?

RoboTou Stacker supports workflows for starry skies, landscapes, star trails, and car-light trails, utilizing automatic masking and alignment for optimal results.

### How much does RoboTou Stacker cost?

RoboTou Stacker is free to download and use. It offers an optional 'RoboTou Stacker Pro Annual' subscription for $5.00/P1Y for advanced features.

### What devices is RoboTou Stacker compatible with?

RoboTou Stacker is compatible with iPhone and iPad devices, indicated by its support for these platforms.

### How often is RoboTou Stacker updated?

The latest version is 1.0.4, and it was last updated on April 30, 2026, suggesting a recent update cycle.

### What is the age rating for RoboTou Stacker?

RoboTou Stacker has an age rating of 4+, making it suitable for a wide range of users.

### Does RoboTou Stacker have ads?

No, RoboTou Stacker does not contain advertisements, allowing for an uninterrupted editing experience.

## Version history (last 5 releases)

### 1.0.5 — 2026-08-24

What’s New in Version 1.0.5

Added on-device AI Star Removal for RoboTou Pro.

### 1.0.4 — 2026-04-30

Auto mask tuning updates for better sky-mask generation

### 1.0.3 — 2026-04-25

Added source selection after choosing a stack mode: Photos, Files, and Folder.

### 1.0.2 — 2026-04-20

- Added Star Trails Pro support for stacking up to 100 images.
- Improved temporary file cleanup after stack processing to reduce local storage usage.
- Improved stability and memory behavior during large stack processing.

### 1.0.1 — 2026-04-19

- Improved automatic sky masking for more stable sky and foreground separation.
- Reduced isolated mask artifacts in night-sky scenes for cleaner stacking results.
- Improved edge handling around mountains, horizon lines, and fine details.
- Added native iPad support.
- Optimized the interface layout for iPad and larger screens.
- General performance and usability improvements.

## Related topics

[image stackin](https://appshunter.io/ios/topics/image-stackin) · [image stacker](https://appshunter.io/ios/topics/image-stacker)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*