# Penumbra Invert vs SpeedReader

The clearest difference is iOS requirement: Penumbra Invert at 15.0 against SpeedReader's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | Penumbra Invert | SpeedReader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Size | 1 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vincent Spitale](https://appshunter.io/developer/1564663828) | [Chris Cantu](https://appshunter.io/developer/1891515217) |

## What reviewers say

### Penumbra Invert

[App page](https://appshunter.io/ios/app/penumbra-invert/id1609172060)

**Features:** Safari Extension

**In-app purchases:** none


### SpeedReader

[App page](https://appshunter.io/ios/app/speedreader-rsvp-reader/id6761791639)

**Features:** macOS Compatibility, Safari Extension

**In-app purchases:** none


## Frequently asked questions

### Is Penumbra Invert free?

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

### Is SpeedReader free?

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

### Do Penumbra Invert or SpeedReader have ads?

Neither Penumbra Invert nor SpeedReader shows ads.

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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.*