# I Know vs WisdomScroll

The clearest difference is ads: I Know at none against WisdomScroll's shown. WisdomScroll's advantage is iOS requirement (15.1 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. I Know sells 5 in-app purchases, starting at $9.99 per month and WisdomScroll sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

I Know ships an update every 4 days, WisdomScroll every 3 days. The most recent releases landed on October 8, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | I Know | WisdomScroll |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 days | **Every 3 days** |
| Size | 32 MB | 43 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Proksi Yazılım](https://appshunter.io/developer/1739308877) | [Onurcan Icen](https://appshunter.io/developer/1777726825) |

## What reviewers say

### I Know

[App page](https://appshunter.io/ios/app/i-know-book-summary/id6741852658)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Recurring! | $9.99 | per month |
| 3 Monthly Recurring! | $19.99 | per 3 months |
| Final Subscription | $39.99 | per year |
| Yearly Recurring! | $69.99 | per year |
| Trial Yearly Recurring! | $69.99 | per year |


### WisdomScroll

[App page](https://appshunter.io/ios/app/wisdomscroll-scroll-books/id6749245870)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WisdomScroll Monthly | $12.99 | per month |
| WisdomScroll Annual | $99.99 | per year |


## Frequently asked questions

### Is I Know free?

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

### Is WisdomScroll free?

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

### Do I Know or WisdomScroll have ads?

WisdomScroll shows ads; I Know does not.

### Which is updated more often, I Know or WisdomScroll?

I Know ships an update every 4 days, and WisdomScroll every 3 days. Most recently, I Know was updated on October 8, 2026 and WisdomScroll on October 5, 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.*