# Exoplanet Explorer vs Astris

The clearest difference is in-app purchases: Astris at none against Exoplanet Explorer's 4. Astris also leads on iOS requirement (15.0 vs 17.6). Exoplanet Explorer's advantage is update cadence (every 2 weeks vs every 3 months) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. Exoplanet Explorer sells 4 in-app purchases, starting at $2.99 per 3 months. Astris asks for nothing beyond the download.

Exoplanet Explorer ships an update every 2 weeks, Astris every 3 months. The most recent releases landed on August 26, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | Exoplanet Explorer | Astris |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (70 ratings)](https://appshunter.io/ios/app/exoplanet-explorer/id1457614833/reviews)** | — |
| Number of ratings | **70** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Freemium | — |
| Size | 159 MB | 21 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | **iPhone, iPad, Apple Watch, Vision Pro** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carsten Knoblich](https://appshunter.io/developer/541438854) | [ISTITUTI EDMONDO DE AMICIS SRL](https://appshunter.io/developer/1219261025) |

## What reviewers say

### Exoplanet Explorer

[App page](https://appshunter.io/ios/app/exoplanet-explorer/id1457614833)

Explore a vast catalog of over 6,000 confirmed exoplanets with detailed scientific data. Compare worlds, visualize habitable zones, and track new discoveries. Ideal for stargazers, students, educators, and researchers.

**Highlights:** 6,000+ confirmed exoplanets, Detailed scientific data, Advanced filtering and sorting, Planet comparison tool, Habitable zone analysis, Home screen widgets, Apple Watch companion app

**Features:** macOS Compatibility, Family Sharing, Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 months subscription | $2.99 | per 3 months |
| 12 months subscription | $6.99 | per year |
| Big supporting tip | $2.99 | one-time |
| Really big supporting tip | $4.99 | one-time |


### Astris

[App page](https://appshunter.io/ios/app/astris/id6454899891)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Exoplanet Explorer free?

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

### Is Astris free?

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

### Do Exoplanet Explorer or Astris have ads?

Neither Exoplanet Explorer nor Astris shows ads.

### Which is updated more often, Exoplanet Explorer or Astris?

Exoplanet Explorer ships an update every 2 weeks, and Astris every 3 months. Most recently, Exoplanet Explorer was updated on August 26, 2026 and Astris on May 16, 2026.

---

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