# Stars Blinker vs OnStep Controller

The clearest difference is in-app purchases: OnStep Controller at none against Stars Blinker's 1. Stars Blinker's advantage is iOS requirement (12.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Stars Blinker sells 1 one-off in-app purchase. OnStep Controller asks for nothing beyond the download.

## The numbers

| Metric | Stars Blinker | OnStep Controller |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/stars-blinker/id1569633657/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Monetization | Free | — |
| Size | 25 MB | 7 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Roberto De Lorenzo](https://appshunter.io/developer/692760870) | [Gray Digital Arts LLC](https://appshunter.io/developer/1895978400) |

## What reviewers say

### Stars Blinker

[App page](https://appshunter.io/ios/app/stars-blinker/id1569633657)

This app helps deep-sky photographers compare two images of the same celestial area taken at different times. It highlights changes in object position or brightness by blinking them, making it easier to spot phenomena like variable stars or asteroids.

**Highlights:** Compare two deep-sky images, Highlight changes in object position/brightness, Align images using three stars, Use images from different instruments, Adjust blinking interval, Save animations as movies

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all features | $1.99 | one-time |


### OnStep Controller

[App page](https://appshunter.io/ios/app/onstep-controller-gda/id6765521295)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stars Blinker free?

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

### Is OnStep Controller free?

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

### Do Stars Blinker or OnStep Controller have ads?

Neither Stars Blinker nor OnStep Controller 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.*