# Earth Robo. vs KnowScroll

The clearest difference is update cadence: KnowScroll at weekly against Earth Robo.'s every 7 months. Earth Robo.'s advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Earth Robo. ships an update every 7 months, KnowScroll weekly. The most recent releases landed on September 19, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Earth Robo. | KnowScroll |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 7 months | **Weekly** |
| Size | 60 MB | 74 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MASAHIRO MIZUTANI](https://appshunter.io/developer/368158224) | [Vu Viet Duc](https://appshunter.io/developer/1888927607) |

## What reviewers say

### Earth Robo.

[App page](https://appshunter.io/ios/app/earth-robo/id683888321)

**Features:** Vision Pro support

**In-app purchases:** none


### KnowScroll

[App page](https://appshunter.io/ios/app/knowscroll-knowledge-feed/id6780197640)

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

**In-app purchases:** none


## Frequently asked questions

### Is Earth Robo. free?

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

### Is KnowScroll free?

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

### Do Earth Robo. or KnowScroll have ads?

Both Earth Robo. and KnowScroll show ads.

### Which is updated more often, Earth Robo. or KnowScroll?

Earth Robo. ships an update every 7 months, and KnowScroll weekly. Most recently, Earth Robo. was updated on September 19, 2026 and KnowScroll on September 7, 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.*