# LensBook vs K

The clearest difference is update cadence: LensBook at every 2 weeks against K's every 4 weeks. 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.

LensBook ships an update every 2 weeks, K every 4 weeks. Both last shipped on October 28, 2026.

## The numbers

| Metric | LensBook | K |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Every 4 weeks |
| Size | 82 MB | 69 MB |
| Requires iOS | 15.5 | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HyunWoo Shim](https://appshunter.io/developer/1822823961) | [philgoo heo](https://appshunter.io/developer/1153253551) |

## What reviewers say

### LensBook

[App page](https://appshunter.io/ios/app/lensbook/id6757357167)

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

**In-app purchases:** none


### K

[App page](https://appshunter.io/ios/app/k-pockit/id6762417616)

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

**In-app purchases:** none


## Frequently asked questions

### Is LensBook free?

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

### Is K free?

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

### Do LensBook or K have ads?

Both LensBook and K show ads.

### Which is updated more often, LensBook or K?

LensBook ships an update every 2 weeks, and K every 4 weeks. Most recently, LensBook was updated on October 28, 2026 and K 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.*