# Sideris vs Deep Sky Scanner

The clearest difference is in-app purchases: Deep Sky Scanner at none against Sideris's 1. Deep Sky Scanner also leads on update cadence (every 3 days vs every 10 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sideris sells 1 one-off in-app purchase. Deep Sky Scanner asks for nothing beyond the download.

Sideris ships an update every 10 days, Deep Sky Scanner every 3 days. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Sideris | Deep Sky Scanner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 3 days** |
| Size | 127 MB | 2 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Loris BERT](https://appshunter.io/developer/6809145520) | [Chris Eddy](https://appshunter.io/developer/6809615073) |

## What reviewers say

### Sideris

[App page](https://appshunter.io/ios/app/sideris-star-map-and-solver/id6809145518)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Plate Solving | $9.99 | one-time |


### Deep Sky Scanner

[App page](https://appshunter.io/ios/app/deep-sky-scanner/id6809615071)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sideris free?

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

### Is Deep Sky Scanner free?

Deep Sky Scanner is free to download, with no in-app purchases.

### Do Sideris or Deep Sky Scanner have ads?

Neither Sideris nor Deep Sky Scanner shows ads.

### Which is updated more often, Sideris or Deep Sky Scanner?

Sideris ships an update every 10 days, and Deep Sky Scanner every 3 days. Most recently, Sideris was updated on October 9, 2026 and Deep Sky Scanner on October 7, 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.*