Comparison

H2O vs waterdrop® Hydration App

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

Head to head
About

H2O

This application helps you monitor your daily water consumption to ensure you stay adequately hydrated. It offers a visually appealing interface with features for quickly logging intake and reviewing your progress.

Highlights
  • Log water intake quickly
  • Preset water amounts
  • Weekly intake graph
  • Full history of entries
  • HealthKit integration
  • Intuitive interface
Features
Read full description

Most water apps give you the same goal every day. H2O raises yours on hot days and after workouts, so you drink what your body actually needs. Log a glass in one tap from your iPhone, Apple Watch or Home Screen, and watch your streak grow on the calendar. H2O makes staying hydrated the easiest habit you'll build. H2O has helped people stay hydrated since 2016, and version 2.0 is rebuilt from the ground up. FEATURES ◉ Daily goals that adapt to the local weather and your workouts in Apple Health. ◉ Quickly add entries with preset water amounts, or enter a custom amount. ◉ An Apple Watch app with complications for your watch face. ◉ Home Screen widgets that log water with one tap. ◉ Gentle reminders to drink throughout the day. ◉ A calendar that shows every day you hit your goal. ◉ Charts of your weekly and monthly water intake. ◉ A full history of water entries. ◉ Apple Health integration and iCloud sync across your devices. ◉ Export your water history as a PDF. ◉ Track in ounces or milliliters. ◉ Support for VoiceOver, Voice Control, Larger Text and Reduced Motion. ◉ A beautiful and intuitive interface! H2O PRO H2O requires H2O Pro, available as a monthly or yearly auto-renewing subscription, or as a one-time lifetime purchase. The yearly plan includes a 7-day free trial for eligible new subscribers. If you used H2O before version 2.0, the app stays free for you, and H2O Pro adds adaptive goals and PDF export. Payment is charged to your Apple Account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ H2O Terms: https://lunarbits.io/terms.html Privacy Policy: https://lunarbits.io/privacy.html

About

waterdrop® Hydration App

This app helps you establish personal hydration goals and daily targets to make drinking water a habit. It tracks your fluid intake, sends reminders, and offers challenges to keep you motivated. It also integrates with Apple Health for automatic target updates based on activity.

Highlights
  • Personalized hydration goals
  • Daily drinking targets
  • Fluid intake tracking
  • Water intake reminders
  • In-app challenges
  • Apple Health integration
Features
Read full description

Your dry spell ends here! How much water should you drink a day? Everybody has different needs. We help you establish your personal hydration goals & daily targets and make sure that drinking water becomes second nature. App your drinking game. The waterdrop® Hydration App helps you keep on track with your fluid-intake. It's your water tracker app that reminds you to drink water and challenges you to take it one sip further. Our app... • Tracks Keep track of your drinking habits 24/7 and reach daily targets. • Reminds Regular water reminders help you reach your daily drinking goals – sip by sip. • Challenges Discover in-app challenges, collect exclusive Club points and exchange them for free accessories. We even integrate with Apple Health, which means you can sync your water intake to Apple Health and automatically update your hydration target based on the activity you logged in Apple Health. NEW: Fancy an extra smart water bottle? The innovative LUCY Smart Cap automatically measures your every sip in the waterdrop® Hydration App, uses UV-purification to gently clean your water (without any chemicals!) and reminds you to reach your daily drinking goal by flashing softly. Thanks to LUCY, your water bottle tracks, purifies your water and reminds you to drink – all in one.

Screenshots

H2O4 screens
waterdrop® Hydration App4 screens

Verdict

The call

The clearest difference is in-app purchases: waterdrop® Hydration App at none against H2O's 6. waterdrop® Hydration App also leads on rating (4.8 vs 4.4) and ratings volume (781 vs 129). H2O's advantage is update cadence (every 3 days vs every 2 months). On price, review sentiment, ads and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. H2O sells 4 in-app purchases, starting at $1.99 per month. waterdrop® Hydration App asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

waterdrop® Hydration App holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: waterdrop® Hydration App has 781 ratings behind it against 129, so its average is the more settled of the two. Written reviews complicate that: 85% of H2O's written reviews are positive against 83% of waterdrop® Hydration App's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

H2O ships an update every 3 days, waterdrop® Hydration App every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard6 real differences · 4 level
H2O versus waterdrop® Hydration App: the parameters behind the verdict, then further details
ParameterH2Owaterdrop® Hydration App
PriceFreeFree
Rating4.4 (129 ratings)4.8 (781 ratings) — better
Positive reviews84.9% of reviews — better83.1% of reviews
Number of ratings129781 — better
Update frequencyEvery 3 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPod, Apple Watch — better
Requires iOS26.015.0 — better
Further details — not scored
Size48 MB95 MB
Age rating12+4+
DeveloperLunarbits LLCWaterdrop Microdrink GmbH

Customer experience

H2O

All ratings129 ratings
Positive86.8%
Neutral3.9%
Negative9.3%
Written reviews53 reviews
Positive84.9%
Neutral1.9%
Negative13.2%

waterdrop® Hydration App

All ratings779 ratings
Positive96.3%
Neutral1.7%
Negative2.1%
Written reviews337 reviews
Positive83.1%
Neutral7.1%
Negative9.8%

User reviews

H2O

From 129 App Store ratings

What we love

  • 👍 Simple and intuitive interface
  • 💰 Free to use
  • 🚫 Ad-free experience
  • ✨ Clean and minimalist design
  • 🚀 Quick and easy logging

Room to improve

  • 🐛 App crashes when accessing settings
  • 🐛 App shuts off when accessing settings
  • 🐛 Graph feature not working
  • 💡 Missing reminder notifications
  • 💡 Cannot edit previous day's entries

waterdrop® Hydration App

From 781 App Store ratings

What we love

  • 👍 Helps track water intake
  • 💡 Challenges and points system motivate users
  • 🚀 Easy to use and intuitive
  • 👍 Integrates with Waterdrop products
  • 👍 Customizable hydration goals

Room to improve

  • 🐛 Occasional data loss or reset of progress
  • 🔍 Limited drink options (no milk, smoothies, etc.)
  • 🔍 Cannot edit or backdate entries
  • 🔍 Inconsistent tracking of some drink types (e.g. coffee)
  • 🔍 Lack of Apple Health integration

Bugs and requests

H2O

Reported bugs

5 issues
  • App crashes when accessing settings
  • App shuts off when accessing settings
  • Graph feature not working
  • App closes when goal is reached
  • Glitches when reaching goal

Requested features

20 requests
  • Add reminder notifications
  • Allow editing of previous day's entries
  • Add metric units (ml/L)
  • Add widget support
  • Add export to HealthKit option
Show 15 more
  • Add ability to flip to a second profile
  • Add Apple Watch integration
  • Add dark mode
  • Add support for other beverages (coffee, tea)
  • Add Shortcuts support
  • Fix app closing when goal is reached
  • Fix glitches when reaching goal
  • Clarify how to delete entries
  • Add total fluid intake of previous days by each day in history
  • Allow changing the date/time of an entry
  • Allow the app to read HealthKit data
  • Automatically update daily goal with age, weight, and gender
  • Refine daily goal with location and activity data
  • Add a way to donate to the developer
  • Screen adjustment sizes for newer iPhones

waterdrop® Hydration App

Reported bugs

3 issues
  • Challenges/progress sometimes reset unexpectedly
  • Connectivity issues with Lucy smart cap
  • App crashes or freezes on some devices

Requested features

6 requests
  • Ability to edit or backdate entries
  • Integration with Apple Health
  • Option to save custom drink sizes
  • Mixing/blending of Waterdrop flavors
  • Inventory tracking for Waterdrop products
Show 1 more
  • Apple Watch app or complications

In-app purchases

4 purchases

H2O

Subscriptions3
  • H2O Pro Monthly2 variants$1.991 Month
  • H2O Pro Yearly7 Days trial$9.991 Year
  • H2O Pro Yearly$9.991 Year
One-time1
  • H2O Pro Lifetime2 variants$19.99
None

waterdrop® Hydration App

No in-app purchases

Questions

Is H2O free?
H2O is free to download, with in-app purchases available.
Is waterdrop® Hydration App free?
waterdrop® Hydration App is free to download, with no in-app purchases.
Which has better reviews, H2O or waterdrop® Hydration App?
waterdrop® Hydration App is rated higher. H2O averages 4.4 out of 5 from 129 ratings, while waterdrop® Hydration App averages 4.8 from 781 ratings.
Do H2O or waterdrop® Hydration App have ads?
Neither H2O nor waterdrop® Hydration App shows ads.
Which is updated more often, H2O or waterdrop® Hydration App?
H2O ships an update every 3 days, and waterdrop® Hydration App every 2 months. Most recently, H2O was updated on October 24, 2026 and waterdrop® Hydration App on October 25, 2026.

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