# I Know vs QuickListen

The clearest difference is update cadence: I Know at every 4 days against QuickListen's every 11 days. QuickListen's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. I Know sells 5 in-app purchases, starting at $9.99 per month and QuickListen sells 4 in-app purchases, starting at $0.49 per 7 days. Whichever you choose, the download price is not the number that matters.

I Know ships an update every 4 days, QuickListen every 11 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | I Know | QuickListen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 11 days |
| Size | 32 MB | 71 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Proksi Yazılım](https://appshunter.io/developer/1739308877) | [Faiz Rasool](https://appshunter.io/developer/1798142109) |

## 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 |


### QuickListen

[App page](https://appshunter.io/ios/app/quicklisten-book-summaries/id6742394891)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $0.49 | per 7 days |
| Monthly Plan | $0.99 | per month |
| Six Month | $4.99 | per 6 months |
| Yearly Plan | $9.99 | per year |


## Frequently asked questions

### Is I Know free?

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

### Is QuickListen free?

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

### Do I Know or QuickListen have ads?

Neither I Know nor QuickListen shows ads.

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

I Know ships an update every 4 days, and QuickListen every 11 days. Most recently, I Know was updated on October 28, 2026 and QuickListen on October 28, 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.*