# Deep Space Science vs Sideris

The clearest difference is in-app purchases: Deep Space Science at none against Sideris's 1. Deep Space Science also leads on iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | Deep Space Science | Sideris |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 weeks |
| Size | 22 MB | 137 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [WingYeung Ma](https://appshunter.io/developer/1790034550) | [Loris BERT](https://appshunter.io/developer/6809145520) |

## What reviewers say

### Deep Space Science

[App page](https://appshunter.io/ios/app/deep-space-science/id6758235431)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sideris

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is Deep Space Science free?

Deep Space Science is free to download, with no in-app purchases.

### Is Sideris free?

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

### Do Deep Space Science or Sideris have ads?

Neither Deep Space Science nor Sideris 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.*