# Eagle Image Stacker vs RoboTou Stacker

The clearest difference is review sentiment: RoboTou Stacker at 100% against Eagle Image Stacker's 0%. RoboTou Stacker also leads on rating (5.0 vs 1.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Eagle Image Stacker sells 3 in-app purchases, starting at $9.99 per month and RoboTou Stacker sells 2 in-app purchases, starting at $5.00 per year. Whichever you choose, the download price is not the number that matters.

RoboTou Stacker holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 0% of Eagle Image Stacker's written reviews are positive against 100% of RoboTou Stacker's.

## The numbers

| Metric | Eagle Image Stacker | RoboTou Stacker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/eagle-image-stacker/id6757908614/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/robotou-stacker/id6761755082/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 31 MB | 88 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [AL MUATASIM AL MAADI](https://appshunter.io/developer/1869537738) | [振国 吴](https://appshunter.io/developer/1739933647) |

## What reviewers say

### Eagle Image Stacker

[App page](https://appshunter.io/ios/app/eagle-image-stacker/id6757908614)

Astro stacking and RAW image processing toolkit for iPhone. Align, stack, and export high-quality results for star fields, galaxies, planets, and more. Features on-device processing for privacy and flexibility.

**Highlights:** RAW, DNG, ProRAW, JPEG, HEIF, TIFF support, Astro Mode for deep-sky objects, Planets Mode with ROI tracking, RAW converter and inspector, Calibration tools (dark, flat frames), On-device processing, Export high-quality results

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Eagle Pro Monthly | $9.99 | per month |
| Eagle Pro Annual | $40.99 | per year |
| Eagle Pro Lifetime | $49.99 | one-time |


### 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 |


## Frequently asked questions

### Is Eagle Image Stacker free?

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

### Is RoboTou Stacker free?

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

### Which has better reviews, Eagle Image Stacker or RoboTou Stacker?

RoboTou Stacker is rated higher. Eagle Image Stacker averages 1.0 out of 5 from 1 ratings, while RoboTou Stacker averages 5.0 from 1 ratings.

### Do Eagle Image Stacker or RoboTou Stacker have ads?

Neither Eagle Image Stacker nor RoboTou Stacker shows ads.

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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.*