# Rapidly vs BionicWords

The clearest difference is update cadence: BionicWords at every 2 days against Rapidly's fortnightly. BionicWords also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Rapidly sells 4 in-app purchases, starting at $2.99 per 7 days and BionicWords sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Rapidly ships an update fortnightly, BionicWords every 2 days. The most recent releases landed on September 8, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Rapidly | BionicWords |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rapidly-speed-reading/id6758515012/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 43 MB | 68 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BAGL LIMITED](https://appshunter.io/developer/1833752222) | [CODENESTLE PTY LTD](https://appshunter.io/developer/1841627016) |

## What reviewers say

### Rapidly

[App page](https://appshunter.io/ios/app/rapidly-speed-reading/id6758515012)

Enhance your reading speed and focus with this app's RSVP technique. It displays words sequentially, reducing eye movement to help you process articles, PDFs, and EPUBs faster. Track your progress and adjust your reading pace from 100 to over 1200 WPM.

**Highlights:** RSVP reading technique, Import from URL, clipboard, files, Adjustable reading speed (100-1200+ WPM), Automatic chapter detection, Progress tracking, Dark mode, Resume reading

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rapidly Pro | $2.99 | per 7 days |
| Rapidly Pro | $3.99 | per month |
| Rapidly Pro | $14.99 | per year |
| Rapidly Pro | $24.99 | one-time |


### BionicWords

[App page](https://appshunter.io/ios/app/bionicwords/id6759376303)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BionicWords Pro | $3.99 | one-time |


## Frequently asked questions

### Is Rapidly free?

Rapidly is free to download, with in-app purchases available.

### Is BionicWords free?

BionicWords is free to download, with in-app purchases available.

### Do Rapidly or BionicWords have ads?

Neither Rapidly nor BionicWords shows ads.

### Which is updated more often, Rapidly or BionicWords?

Rapidly ships an update fortnightly, and BionicWords every 2 days. Most recently, Rapidly was updated on September 8, 2026 and BionicWords on September 10, 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.*