# On vs Luz Atômica

The clearest difference is update cadence: On at every 5 days against Luz Atômica's monthly. Luz Atômica's advantage is iOS requirement (15.1 vs 17.0). 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.

On ships an update every 5 days, Luz Atômica monthly. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | On | Luz Atômica |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Size | 408 MB | 30 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Luana Thomas](https://appshunter.io/developer/1688608260) | [Membox](https://appshunter.io/developer/1769673407) |

## What reviewers say

### On

[App page](https://appshunter.io/ios/app/on-key/id6470926583)

**Features:** macOS Compatibility

**In-app purchases:** none


### Luz Atômica

[App page](https://appshunter.io/ios/app/luz-atomica/id6756884697)

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

**In-app purchases:** none


## Frequently asked questions

### Is On free?

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

### Is Luz Atômica free?

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

### Do On or Luz Atômica have ads?

Neither On nor Luz Atômica shows ads.

### Which is updated more often, On or Luz Atômica?

On ships an update every 5 days, and Luz Atômica monthly. Most recently, On was updated on September 29, 2026 and Luz Atômica on October 7, 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.*