Comparison

H2O vs Simple Hydration Tracker

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

Simple Hydration Tracker

Easily log your daily water intake by selecting beverages, amounts, and times. Review your hydration habits with weekly and monthly charts. Add past entries and customize drink options for a stress-free experience.

Highlights
  • Easy drink logging
  • Add past entries
  • Weekly/monthly analysis charts
  • Customizable drink list
  • No login required
Features
Read full description

An app that allows you to record your daily hydration. Why don't you measure whether you are getting enough water, which is important for your health and diet? Registration is very easy! All you have to do is select the beverage you drank, the amount you drank, and the time you drank it, and tap the "Save" button. . You can use it stress-free with simple operations. Even if you forget to record a drink, you can add past data from the “Calendar” screen. On the "Analysis" screen, you can check your weekly and monthly water intake on a chart. The "Drinks" list screen allows you to add drinks and edit registered drinks. ● Features ・Easy to use, just select and register. ・No need to log in. ・With the calendar, you can quickly check your daily water intake. ●Disclaimer This App is not medical or treatment advice. It is neither professional diagnosis, opinion or service – and may not be treated as such by the user. We strongly recommend that you consult your own physician or another available health professional regarding any diagnosis, findings or interpretation. ● Privacy Policy https://apps.seeds-digital.com/privacy-policy/ ● Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

H2O4 screens
Simple Hydration Tracker4 screens

Verdict

The call

The clearest difference is rating: Simple Hydration Tracker at 5.0 against H2O's 4.3. Simple Hydration Tracker also leads on update cadence (every 4 weeks vs every 4 months) and review sentiment (100% vs 86%). H2O's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price 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. Simple Hydration Tracker sells 2 in-app purchases, starting at $1.49 per month. H2O asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Simple Hydration Tracker holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: H2O has 80 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 86% of H2O's written reviews are positive against 100% of Simple Hydration Tracker's.

UpkeepUpdate frequency

H2O ships an update every 4 months, Simple Hydration Tracker every 4 weeks. The most recent releases landed on October 20, 2026 and October 5, 2026 respectively.

Scorecard8 real differences · 2 level
H2O versus Simple Hydration Tracker: the parameters behind the verdict, then further details
ParameterH2OSimple Hydration Tracker
PriceFreeFree
Rating4.3 (80 ratings)5.0 (1 ratings) — better
Positive reviews86.3% of reviews100.0% of reviews — better
Number of ratings80 — better1
Update frequencyEvery 4 monthsEvery 4 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS26.013.0 — better
Further details — not scored
Size41 MB51 MB
Age rating12+17+
DeveloperLunarbits LLCNAOYA ONO

Customer experience

H2O

All ratings80 ratings
Positive85.0%
Neutral2.5%
Negative12.5%
Written reviews51 reviews
Positive86.3%
Neutral2.0%
Negative11.8%

Simple Hydration Tracker

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Simple Hydration Tracker

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

H2O

No in-app purchases

2 purchases

Simple Hydration Tracker

Subscriptions1
  • Premium Plan$1.491 Month
One-time1
  • Support Developer$0.99

Questions

Is H2O free?
H2O is free to download, with no in-app purchases.
Is Simple Hydration Tracker free?
Simple Hydration Tracker is free to download, with in-app purchases available.
Which has better reviews, H2O or Simple Hydration Tracker?
Simple Hydration Tracker is rated higher. H2O averages 4.3 out of 5 from 80 ratings, while Simple Hydration Tracker averages 5.0 from 1 ratings.
Do H2O or Simple Hydration Tracker have ads?
Simple Hydration Tracker shows ads; H2O does not.
Which is updated more often, H2O or Simple Hydration Tracker?
H2O ships an update every 4 months, and Simple Hydration Tracker every 4 weeks. Most recently, H2O was updated on October 20, 2026 and Simple Hydration Tracker on October 5, 2026.

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