# Horizon vs Sideris

The clearest difference is in-app purchases: Horizon at none against Sideris's 1. Sideris's advantage is update cadence (every 2 weeks vs every 2 months). 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. Horizon asks for nothing beyond the download.

Horizon ships an update every 2 months, Sideris every 2 weeks. The most recent releases landed on October 23, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Horizon | Sideris |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 42 MB | 137 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Michael Bartos](https://appshunter.io/developer/1896744840) | [Loris BERT](https://appshunter.io/developer/6809145520) |

## What reviewers say

### Horizon

[App page](https://appshunter.io/ios/app/horizon-ar/id6770460809)

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

**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 Horizon free?

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

### Is Sideris free?

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

### Do Horizon or Sideris have ads?

Neither Horizon nor Sideris shows ads.

### Which is updated more often, Horizon or Sideris?

Horizon ships an update every 2 months, and Sideris every 2 weeks. Most recently, Horizon was updated on October 23, 2026 and Sideris on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*