# Interactive Solar System vs By

The clearest difference is price: By at Free against Interactive Solar System's $1.99. By also leads on update cadence (daily vs fortnightly). Interactive 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; Interactive Solar System costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Interactive Solar System ships an update fortnightly, By daily. The most recent releases landed on October 5, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Interactive Solar System | By |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Size | 52 MB | 8 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPad, Apple TV | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Appno UG (haftungsbeschrankt)](https://appshunter.io/developer/1495324399) |

## What reviewers say

### Interactive Solar System

[App page](https://appshunter.io/ios/app/interactive-solar-system/id1240878228)

**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 Interactive Solar System free?

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

### Is By free?

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

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

Neither Interactive Solar System nor By shows ads.

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

Interactive Solar System ships an update fortnightly, and By daily. Most recently, Interactive Solar System was updated on October 5, 2026 and By on September 26, 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.*