# HydroApp vs Luma

The clearest difference is in-app purchases: HydroApp at none against Luma's 1. HydroApp also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.0). Luma's advantage is update cadence (every 2 days vs every 20 months). On price and device support there is nothing between them.

Both are free to download. Luma sells 1 one-off in-app purchase. HydroApp asks for nothing beyond the download.

HydroApp ships an update every 20 months, Luma every 2 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | HydroApp | Luma |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 20 months | **Every 2 days** |
| Size | 9 MB | 22 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TETE EN L'AIR](https://appshunter.io/developer/1446541556) | [TOBIAS JUSTINGER](https://appshunter.io/developer/1787675323) |

## What reviewers say

### HydroApp

[App page](https://appshunter.io/ios/app/hydroapp/id1446541557)

**Features:** macOS Compatibility

**In-app purchases:** none


### Luma

[App page](https://appshunter.io/ios/app/luma-baby-feeding-tracker/id6761003627)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Luma Premium | $2.99 | one-time |


## Frequently asked questions

### Is HydroApp free?

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

### Is Luma free?

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

### Do HydroApp or Luma have ads?

Luma shows ads; HydroApp does not.

### Which is updated more often, HydroApp or Luma?

HydroApp ships an update every 20 months, and Luma every 2 days. Most recently, HydroApp was updated on October 25, 2026 and Luma 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.*