# RoboTou Stacker vs 影犀

The clearest difference is iOS requirement: 影犀 at 15.2 against RoboTou Stacker's 17.0. On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. RoboTou Stacker sells 2 in-app purchases, starting at $7.99 per year and 影犀 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | RoboTou Stacker | 影犀 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/robotou-stacker/id6761755082/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 92.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 88 MB | 119 MB |
| Requires iOS | 17.0 | **15.2** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [振国 吴](https://appshunter.io/developer/1739933647) | [怡婷 王](https://appshunter.io/developer/6786104009) |

## 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 | $7.99 | per year |
| RoboTou Stacker Pro Lifetime | $39.99 | one-time |


### 影犀

[App page](https://appshunter.io/ios/app/id6790590690)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| camera sync pro | $4.99 | one-time |


## Frequently asked questions

### Is RoboTou Stacker free?

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

### Is 影犀 free?

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

### Do RoboTou Stacker or 影犀 have ads?

Neither RoboTou Stacker nor 影犀 shows ads.

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

RoboTou Stacker ships an update every 5 days, and 影犀 every 5 days. Most recently, RoboTou Stacker was updated on October 25, 2026 and 影犀 on October 28, 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.*