# Readfly vs Grimoire

The clearest difference is update cadence: Grimoire at every 4 days against Readfly's every 3 weeks. Readfly's advantage is iOS requirement (13.0 vs 26.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Readfly sells 3 in-app purchases, starting at $9.99 per month and Grimoire sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Readfly ships an update every 3 weeks, Grimoire every 4 days. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Readfly | Grimoire |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Freemium | — |
| Size | 115 MB | 108 MB |
| Requires iOS | **13.0** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [ENES CERRAHOGLU](https://appshunter.io/developer/1842658403) | [ALEXANDRE DE PAULA DIAS JUNIOR](https://appshunter.io/developer/1883319485) |

## What reviewers say

### Readfly

[App page](https://appshunter.io/ios/app/readfly/id6470707328)

Enhance your reading speed and efficiency with scientific techniques. This platform helps you consume more books in less time, making the reading experience accessible and effective.

**Highlights:** Scientific speed reading techniques, Efficient book reading, Accessible reading experience, New generation reading platform

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| 3 Months | $24.99 | per 3 months |
| Annual | $89.99 | per year |


### Grimoire

[App page](https://appshunter.io/ios/app/grimoire-books/id6805212376)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grimoire Books | $4.99 | per month |
| Grimoire: Books | $39.99 | per year |


## Frequently asked questions

### Is Readfly free?

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

### Is Grimoire free?

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

### Do Readfly or Grimoire have ads?

Neither Readfly nor Grimoire shows ads.

### Which is updated more often, Readfly or Grimoire?

Readfly ships an update every 3 weeks, and Grimoire every 4 days. Most recently, Readfly was updated on October 15, 2026 and Grimoire on October 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*