# GROHE Watersystems vs Oldtimerwandern

The clearest difference is update cadence: Oldtimerwandern at fortnightly against GROHE Watersystems's every 4 months. GROHE Watersystems's advantage is iOS requirement (14.0 vs 18.6). 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.

GROHE Watersystems ships an update every 4 months, Oldtimerwandern fortnightly. The most recent releases landed on November 5, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | GROHE Watersystems | Oldtimerwandern |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 7.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 86 MB | 217 MB |
| Requires iOS | **14.0** | 18.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Grohe AG](https://appshunter.io/developer/567504975) | [Seitwerk GmbH](https://appshunter.io/developer/406127459) |

## What reviewers say

### GROHE Watersystems

[App page](https://appshunter.io/ios/app/grohe-watersystems/id1502247993)

Manage your smart water faucet from your phone. Set custom pours, monitor consumption, and receive timely alerts for filter and CO2 replacements. This app replaces the older GROHE Ondus App.

**Highlights:** Smartphone control for GROHE Blue faucet, Filter and CO2 bottle replacement alerts, Set custom water pours, Monitor water consumption, Automatic transfer from GROHE Ondus App

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


### Oldtimerwandern

[App page](https://appshunter.io/ios/app/oldtimerwandern/id6759444784)

**In-app purchases:** none


## Frequently asked questions

### Is GROHE Watersystems free?

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

### Is Oldtimerwandern free?

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

### Do GROHE Watersystems or Oldtimerwandern have ads?

Neither GROHE Watersystems nor Oldtimerwandern shows ads.

### Which is updated more often, GROHE Watersystems or Oldtimerwandern?

GROHE Watersystems ships an update every 4 months, and Oldtimerwandern fortnightly. Most recently, GROHE Watersystems was updated on November 5, 2026 and Oldtimerwandern 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.*