# Reader King vs Lumi

The clearest difference is update cadence: Lumi at daily against Reader King's every 4 weeks. Reader King's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Reader King sells 1 one-off in-app purchase and Lumi sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Reader King ships an update every 4 weeks, Lumi daily. The most recent releases landed on October 14, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Reader King | Lumi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Daily** |
| Size | 6 MB | 18 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [lecoo](https://appshunter.io/developer/1630534948) | [Ivan Trajanovski](https://appshunter.io/developer/1718049049) |

## What reviewers say

### Reader King

[App page](https://appshunter.io/ios/app/reader-king/id6785942008)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reader King Enhanced | $0.99 | one-time |


### Lumi

[App page](https://appshunter.io/ios/app/lumi-book-tracker/id6791566415)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lumi Pro Monthly | $5.99 | per month |
| Lumi Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is Reader King free?

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

### Is Lumi free?

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

### Do Reader King or Lumi have ads?

Neither Reader King nor Lumi shows ads.

### Which is updated more often, Reader King or Lumi?

Reader King ships an update every 4 weeks, and Lumi daily. Most recently, Reader King was updated on October 14, 2026 and Lumi 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.*