# Sky Map vs Sideris

The clearest difference is ads: Sideris at none against Sky Map's shown. Sideris also leads on iOS requirement (15.0 vs 18.6). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Sky Map sells 4 in-app purchases, starting at $1.99 per 7 days and Sideris sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Sky Map ships an update every 3 weeks, Sideris every 2 weeks. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Sky Map | Sideris |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/sky-map-live-star-tracker/id6790243989/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 52 MB | 137 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DEEPLY AI](https://appshunter.io/developer/1809787876) | [Loris BERT](https://appshunter.io/developer/6809145520) |

## What reviewers say

### Sky Map

[App page](https://appshunter.io/ios/app/sky-map-live-star-tracker/id6790243989)

Identify stars, planets, and constellations by pointing your device at the sky. Offers offline functionality, multiple visual styles, and real-time ISS and meteor shower tracking. Includes Apple Watch and widget support.

**Highlights:** Live star and planet identification, Offline functionality, ISS and meteor shower tracking, Multiple visual sky styles, Apple Watch integration, 13 customizable widgets, 100% red night mode

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sky Map Premium Weekly | $1.99 | per 7 days |
| Sky Map Premium Monthly | $5.99 | per month |
| Sky Map Premium Yearly | $24.99 | per year |
| Sky Map Premium Lifetime | $79.99 | one-time |


### 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 Sky Map free?

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

### Is Sideris free?

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

### Do Sky Map or Sideris have ads?

Sky Map shows ads; Sideris does not.

### Which is updated more often, Sky Map or Sideris?

Sky Map ships an update every 3 weeks, and Sideris every 2 weeks. Most recently, Sky Map was updated on October 22, 2026 and Sideris on October 24, 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.*