# Exoplanet Explorer vs Instant Math Cards

The clearest difference is device support: Exoplanet Explorer at 5 against Instant Math Cards's 2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Exoplanet Explorer sells 4 in-app purchases, starting at $2.99 per 3 months and Instant Math Cards sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Exoplanet Explorer ships an update every 2 weeks, Instant Math Cards every 3 weeks. The most recent releases landed on October 11, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Exoplanet Explorer | Instant Math Cards |
| --- | --- | --- |
| 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 | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Freemium | — |
| Size | 169 MB | 14 MB |
| Requires iOS | 17.6 | **17.5** |
| Devices | **iPhone, iPad, Mac, Apple Watch, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Carsten Knoblich](https://appshunter.io/developer/541438854) | [Jackson Dow](https://appshunter.io/developer/1748049151) |

## 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 (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 |


### Instant Math Cards

[App page](https://appshunter.io/ios/app/instant-math-cards/id6553973433)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Features Access | $2.99 | one-time |


## Frequently asked questions

### Is Exoplanet Explorer free?

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

### Is Instant Math Cards free?

Instant Math Cards is free to download, with in-app purchases available.

### Do Exoplanet Explorer or Instant Math Cards have ads?

Neither Exoplanet Explorer nor Instant Math Cards shows ads.

### Which is updated more often, Exoplanet Explorer or Instant Math Cards?

Exoplanet Explorer ships an update every 2 weeks, and Instant Math Cards every 3 weeks. Most recently, Exoplanet Explorer was updated on October 11, 2026 and Instant Math Cards on October 21, 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.*