# Exoplanet Explorer vs SwapNumbers

The clearest difference is in-app purchases: SwapNumbers at none against Exoplanet Explorer's 2. SwapNumbers also leads on iOS requirement (15.0 vs 18.0). Exoplanet Explorer's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 3 months). On price there is nothing between them.

Both are free to download. Exoplanet Explorer sells 2 in-app purchases, starting at $2.99 per 3 months. SwapNumbers asks for nothing beyond the download.

Exoplanet Explorer ships an update every 2 weeks, SwapNumbers every 3 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Exoplanet Explorer | SwapNumbers |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Freemium | — |
| Size | 171 MB | 70 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch, Vision Pro** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carsten Knoblich](https://appshunter.io/developer/541438854) | [HappyCode Lab](https://appshunter.io/developer/6793409707) |

## 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:** Family Sharing, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 months subscription | $2.99 | per 3 months |
| 12 months subscription | $6.99 | per year |


### SwapNumbers

[App page](https://appshunter.io/ios/app/swapnumbers-math-puzzle/id1603391248)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Exoplanet Explorer free?

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

### Is SwapNumbers free?

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

### Do Exoplanet Explorer or SwapNumbers have ads?

SwapNumbers shows ads; Exoplanet Explorer does not.

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

Exoplanet Explorer ships an update every 2 weeks, and SwapNumbers every 3 months. Most recently, Exoplanet Explorer was updated on November 2, 2026 and SwapNumbers on November 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.*