# Exoplanet vs Relatively Simple

The clearest difference is in-app purchases: Relatively Simple at none against Exoplanet's 7. Relatively Simple also leads on rating (5.0 vs 4.7) and review sentiment (100% vs 91%). Exoplanet's advantage is ratings volume (956 vs 7) and update cadence (every 2 weeks vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Exoplanet sells 7 one-off in-app purchases. Relatively Simple asks for nothing beyond the download.

Relatively Simple holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Exoplanet has 956 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 91% of Exoplanet's written reviews are positive against 100% of Relatively Simple's.

Exoplanet ships an update every 2 weeks, Relatively Simple monthly. The most recent releases landed on September 21, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Exoplanet | Relatively Simple |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (956 ratings)](https://appshunter.io/ios/app/exoplanet/id327702034/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/relatively-simple/id1464624768/reviews)** |
| Number of ratings | **956** | 7 |
| Positive reviews | 91.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 105 MB | 434 MB |
| Requires iOS | 13.0 | **8.0** |
| Devices | **iPhone, iPad, iPod, Apple TV** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hanno Rein](https://appshunter.io/developer/325840976) | [Ira Rothstein](https://appshunter.io/developer/1464624767) |

## What reviewers say

### Exoplanet

[App page](https://appshunter.io/ios/app/exoplanet/id327702034)

Explore a vast, interactive database of discovered exoplanets and their host stars. Visualize their physical properties, locations in the night sky, and orbital paths. Discover the observable universe from Earth to the cosmic microwave background with stunning 3D models and augmented reality features.

**Highlights:** Interactive visualizations and animations, Daily updated exoplanet and host star properties, 3D Milky Way model with exoplanet locations, Augmented reality sky map, Exoplanet orbit and habitable zone visualizations, Data from multiple exoplanet catalogs

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Galaxy Clusters and CMB | $0.99 | one-time |
| Asteroids | $0.99 | one-time |
| Gaia Stars | $0.99 | one-time |
| S-Stars | $0.99 | one-time |
| Catalogues | $0.99 | one-time |
| Developer Appreciation Coffee | $1.99 | one-time |
| Kepler Add-on | $2.99 | one-time |

**What reviewers like**

- 🚀 Great app
- 👍 Insanely entertaining
- 👍 Amazing graphics and interactive diorama
- 👍 Detailed explanation of planets
- 👍 Awesome app for astronomy and physics lovers

**What reviewers complain about**

- 🐛 Some exoplanets not showing up in search
- 🐛 Inconsistent behavior when switching between databases
- 🔒 Paid upgrades required to access more features
- 🐛 Upgrade purchase issues with Galaxy Clusters and CMB add-on
- 🐛 Exoplanets represented as generic white balls

**Reported bugs**

- Upgrade purchase issues with Galaxy Clusters and CMB add-on
- Kepler objects of interest disappearing when switching databases

**Requested features**

- Add more detailed textures and visuals for exoplanets
- Ability to view multiple databases simultaneously
- Option to see planet surfaces and atmospheres
- Inclusion of dwarf planets in our solar system
- Ability to zoom in on and explore other galaxies


### Relatively Simple

[App page](https://appshunter.io/ios/app/relatively-simple/id1464624768)

This app offers an experiential explanation of Einstein's theory of Special Relativity. Designed by a Carnegie Mellon University professor, it breaks down complex concepts like spacetime and E=mc^2 for a general audience.

**Highlights:** Experiential learning approach, Explains Special Relativity, Demystifies complex physics concepts, Designed by university professor, Accessible for general audience

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Exoplanet free?

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

### Is Relatively Simple free?

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

### Which has better reviews, Exoplanet or Relatively Simple?

Relatively Simple is rated higher. Exoplanet averages 4.7 out of 5 from 956 ratings, while Relatively Simple averages 5.0 from 7 ratings.

### Do Exoplanet or Relatively Simple have ads?

Neither Exoplanet nor Relatively Simple shows ads.

### Which is updated more often, Exoplanet or Relatively Simple?

Exoplanet ships an update every 2 weeks, and Relatively Simple monthly. Most recently, Exoplanet was updated on September 21, 2026 and Relatively Simple on September 19, 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.*