# RoboTou Stacker vs AstroFinish

The clearest difference is in-app purchases: AstroFinish at none against RoboTou Stacker's 2. AstroFinish also leads on ratings volume (4 vs 1). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. RoboTou Stacker sells 2 in-app purchases, starting at $5.00 per year. AstroFinish asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for RoboTou Stacker against 5.0 for AstroFinish. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

RoboTou Stacker ships an update every 5 days, AstroFinish every 4 days. The most recent releases landed on September 10, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | RoboTou Stacker | AstroFinish |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/robotou-stacker/id6761755082/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/astrofinish/id6763904575/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 88 MB | 11 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [振国 吴](https://appshunter.io/developer/1739933647) | [Cody Adams](https://appshunter.io/developer/1744999708) |

## What reviewers say

### RoboTou Stacker

[App page](https://appshunter.io/ios/app/robotou-stacker/id6761755082)

Combine multiple photos directly on your device for enhanced results. This app offers automatic masking and alignment for various photography needs, including starry skies and light trails. Process your images locally without needing an account or cloud sync.

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

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RoboTou Stacker Pro Annual | $5.00 | per year |
| RoboTou Stacker Pro Lifetime | $39.99 | one-time |


### AstroFinish

[App page](https://appshunter.io/ios/app/astrofinish/id6763904575)

Edit astrophotography images directly on your iPhone. Enhance deep-sky objects, clean up skies, and sharpen moon shots with specialized tools. Supports various image formats and offers batch processing for efficient editing.

**Highlights:** Auto Astro Polish, Deep Sky enhancement, Moon sharpening, Nebula and galaxy detail, Denoise and star reduction, Batch processing, RAW and FITS support

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

**In-app purchases:** none


## Frequently asked questions

### Is RoboTou Stacker free?

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

### Is AstroFinish free?

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

### Which has better reviews, RoboTou Stacker or AstroFinish?

RoboTou Stacker and AstroFinish are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.

### Do RoboTou Stacker or AstroFinish have ads?

Neither RoboTou Stacker nor AstroFinish shows ads.

### Which is updated more often, RoboTou Stacker or AstroFinish?

RoboTou Stacker ships an update every 5 days, and AstroFinish every 4 days. Most recently, RoboTou Stacker was updated on September 10, 2026 and AstroFinish on September 3, 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.*