# RelativityTheory vs Cosmos Next

The clearest difference is price: Cosmos Next at Free against RelativityTheory's $0.99. RelativityTheory's advantage is update cadence (every 3 weeks vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Cosmos Next is free to download; RelativityTheory costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RelativityTheory ships an update every 3 weeks, Cosmos Next every 3 months. The most recent releases landed on September 13, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | RelativityTheory | Cosmos Next |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 6 MB | 42 MB |
| Requires iOS | 14.4 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takao Akatsu](https://appshunter.io/developer/1530946331) | [Archana Pant](https://appshunter.io/developer/1836174047) |

## What reviewers say

### RelativityTheory

[App page](https://appshunter.io/ios/app/relativitytheory/id1620999874)

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

**In-app purchases:** none


### Cosmos Next

[App page](https://appshunter.io/ios/app/cosmos-next/id6760355815)

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

**In-app purchases:** none


## Frequently asked questions

### Is RelativityTheory free?

RelativityTheory costs $0.99, with no in-app purchases.

### Is Cosmos Next free?

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

### Do RelativityTheory or Cosmos Next have ads?

Neither RelativityTheory nor Cosmos Next shows ads.

### Which is updated more often, RelativityTheory or Cosmos Next?

RelativityTheory ships an update every 3 weeks, and Cosmos Next every 3 months. Most recently, RelativityTheory was updated on September 13, 2026 and Cosmos Next on September 9, 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.*