# Hydro vs Sermon (Catholic)

The clearest difference is in-app purchases: Hydro at none against Sermon (Catholic)'s 4. Sermon (Catholic)'s advantage is update cadence (daily vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sermon (Catholic) sells 4 one-off in-app purchases. Hydro asks for nothing beyond the download.

Hydro ships an update monthly, Sermon (Catholic) daily. The most recent releases landed on October 8, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Hydro | Sermon (Catholic) |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Size | 7 MB | 11 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Patrick](https://appshunter.io/developer/385768716) | [Gerhard Lentschik](https://appshunter.io/developer/629988041) |

## What reviewers say

### Hydro

[App page](https://appshunter.io/ios/app/hydro-aquatic-data-hub/id6477622181)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Sermon (Catholic)

[App page](https://appshunter.io/ios/app/sermon-catholic/id6743322672)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small - 20 Credits | $1.99 | one-time |
| Medium - 60 Credits | $3.99 | one-time |
| Large - 150 Credits | $8.99 | one-time |
| XL - 400 Credits | $17.99 | one-time |


## Frequently asked questions

### Is Hydro free?

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

### Is Sermon (Catholic) free?

Sermon (Catholic) is free to download, with in-app purchases available.

### Do Hydro or Sermon (Catholic) have ads?

Neither Hydro nor Sermon (Catholic) shows ads.

### Which is updated more often, Hydro or Sermon (Catholic)?

Hydro ships an update monthly, and Sermon (Catholic) daily. Most recently, Hydro was updated on October 8, 2026 and Sermon (Catholic) on October 16, 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.*