Comparison

GROHE Watersystems vs HowMany Events

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

GROHE Watersystems

Manage your GROHE Blue Chilled and Sparkling 2.0 faucet directly from your smartphone. Set personalized water preferences, monitor consumption, and receive timely alerts for filter and CO2 bottle replacements.

Highlights
  • Smartphone faucet control
  • Personalized water settings
  • Water consumption monitoring
  • Filter and CO2 replacement alerts
  • Automatic data transfer from Ondus App
Features
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Control your GROHE Blue Chilled and Sparkling 2.0 faucet via your smartphone. The GROHE Watersystems App will not only help you during the configuration of your watersystem appliance, but will let you know when the filter or CO2 bottle will need replacing. Within this app, you can also set up favourites for pouring water in a predefined amount and sparkling grade, and you can monitor your water consumption. Note: This App replaces the GROHE Ondus App. If you have used the GROHE Ondus App before, then your connected GROHE Blue watersystem will be transferred into this new Watersystems App automatically.

About

HowMany Events

Features
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HowMany puts an end to messy group chats for event planning! Whether it's a team breakfast, a BBQ, or your next big party โ€“ keep track of who's coming and what everyone is bringing. INCREDIBLY EASY Create an event in seconds. Share the link with your friends or colleagues. They can RSVP directly via web or the app โ€“ no tedious registration required for guests. REAL-TIME CHAT Every event has its own dedicated chat. Discuss details, share photos, or ask questions right where the planning happens. No more lost information in endless message threads. QUANTITIES & BRING-LISTS Need to know how many pizzas to order or who's bringing the salad? HowMany handles it for you with clear quantity surveys and organized lists. FEATURES: - Premium design with neon accents and sleek Dark Mode. - Lightning-fast RSVP for guests (no app required). - Push notifications for new messages and updates. - Privacy-first: No unnecessary data collection. - Integrated event calendar. Download HowMany now and experience how relaxed event planning can be!

Screenshots

GROHE Watersystems3 screens
HowMany Events4 screens

Verdict

The call

The clearest difference is ads: GROHE Watersystems at none against HowMany Events's shown. GROHE Watersystems also leads on iOS requirement (14.0 vs 17.6). HowMany Events's advantage is update cadence (every 9 days vs every 4 months). On price, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

GROHE Watersystems ships an update every 4 months, HowMany Events every 9 days. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

Scorecard3 real differences ยท 5 level
GROHE Watersystems versus HowMany Events: the parameters behind the verdict, then further details
ParameterGROHE WatersystemsHowMany Events
PriceFreeFree
Positive reviews7.0% of reviewsโ€”
Update frequencyEvery 4 monthsEvery 9 days โ€” better
AdsNo โ€” betterYes
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPhone, iPod โ€” betteriPhone
Requires iOS14.0 โ€” better17.6
Further details โ€” not scored
Size86 MB7 MB
Age rating17+4+
DeveloperGrohe AGPatrick Wahler

In-app purchases

None

GROHE Watersystems

No in-app purchases

None

HowMany Events

No in-app purchases

Questions

Is GROHE Watersystems free?
GROHE Watersystems is free to download, with no in-app purchases.
Is HowMany Events free?
HowMany Events is free to download, with no in-app purchases.
Do GROHE Watersystems or HowMany Events have ads?
HowMany Events shows ads; GROHE Watersystems does not.
Which is updated more often, GROHE Watersystems or HowMany Events?
GROHE Watersystems ships an update every 4 months, and HowMany Events every 9 days. Most recently, GROHE Watersystems was updated on October 24, 2026 and HowMany Events on October 8, 2026.

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