# SolarTrack vs RoboTou Stacker

SolarTrack and RoboTou Stacker are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. SolarTrack sells 2 in-app purchases, starting at $4.99 per 7 days and RoboTou Stacker sells 2 in-app purchases, starting at $7.99 per year. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | SolarTrack | RoboTou Stacker |
| --- | --- | --- |
| 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 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Monetization | — | Free with in-app purchases |
| Size | 6 MB | 88 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [HONG KONG WOOKAKA PET PRODUCTS CO., LIMITED](https://appshunter.io/developer/1821243531) | [振国 吴](https://appshunter.io/developer/1739933647) |

## What reviewers say

### SolarTrack

[App page](https://appshunter.io/ios/app/solartrack-sun-moon-tracker/id6760690667)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Boost | $4.99 | per 7 days |
| Yearly Boost | $39.99 | per year |


### 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 |


## Frequently asked questions

### Is SolarTrack free?

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

### Is RoboTou Stacker free?

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

### Do SolarTrack or RoboTou Stacker have ads?

Neither SolarTrack 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.*