# The Solar System vs By

The clearest difference is price: By at Free against The Solar System's $1.99. By also leads on update cadence (fortnightly vs every 29 months). The Solar System's advantage is iOS requirement (12.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

By is free to download; The Solar System costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

The Solar System ships an update every 29 months, By fortnightly. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | The Solar System | By |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Fortnightly** |
| Size | 112 MB | 14 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Appno GmbH](https://appshunter.io/developer/1495324399) |

## What reviewers say

### The Solar System

[App page](https://appshunter.io/ios/app/the-solar-system-ar/id1322087991)

**Features:** macOS Compatibility

**In-app purchases:** none


### By

[App page](https://appshunter.io/ios/app/by-pass/id6760612355)

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

**In-app purchases:** none


## Frequently asked questions

### Is The Solar System free?

The Solar System costs $1.99, with no in-app purchases.

### Is By free?

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

### Do The Solar System or By have ads?

Neither The Solar System nor By shows ads.

### Which is updated more often, The Solar System or By?

The Solar System ships an update every 29 months, and By fortnightly. Most recently, The Solar System was updated on October 14, 2026 and By on October 24, 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.*