# I.App vs Strong Lumen

The clearest difference is iOS requirement: I.App at 11.0 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.

I.App ships an update every 3 weeks, Strong Lumen monthly. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | I.App | Strong Lumen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 15 MB | 32 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Advantech](https://appshunter.io/developer/413213069) | [Strong Lumen Opto Co., Ltd.](https://appshunter.io/developer/1847578322) |

## What reviewers say

### I.App

[App page](https://appshunter.io/ios/app/iapp/id1464831857)

**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 I.App free?

I.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 I.App or Strong Lumen have ads?

Neither I.App nor Strong Lumen shows ads.

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

I.App ships an update every 3 weeks, and Strong Lumen monthly. Most recently, I.App was updated on October 26, 2026 and Strong Lumen on October 25, 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.*