# KD App vs Strong Lumen

The clearest difference is iOS requirement: KD App at 13.0 against Strong Lumen's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 18, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | KD App | Strong Lumen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 49 MB | 32 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [深圳市金大智能创新科技有限公司](https://appshunter.io/developer/1700863606) | [Strong Lumen Opto Co., Ltd.](https://appshunter.io/developer/1847578322) |

## What reviewers say

### KD App

[App page](https://appshunter.io/ios/app/kd-app/id6615067013)

**Features:** macOS Compatibility

**In-app purchases:** none


### Strong Lumen

[App page](https://appshunter.io/ios/app/strong-lumen/id6754271831)

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

**In-app purchases:** none


## Frequently asked questions

### Is KD App free?

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

### Is Strong Lumen free?

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

### Do KD App or Strong Lumen have ads?

Neither KD App nor Strong Lumen shows ads.

### Which is updated more often, KD App or Strong Lumen?

KD App ships an update monthly, and Strong Lumen monthly. Most recently, KD App was updated on October 18, 2026 and Strong Lumen on October 25, 2026.

---

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