Comparison

H2O vs HydrateTap

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

HydrateTap

Features
Read full description

HydrateTap — the fastest water tracker, now with Check: your phone reads your body. Plus guided hydration care plans. When did you last actually check your hydration? Point the camera — a face scan, urine scan and skin test build an honest 0–100 verdict, entirely on your device. And logging is still one tap from a widget. No menus, no friction, no excuses. HYDRATETAP CHECK — YOUR BODY, MEASURED Three guided exams, nothing but your phone: • Hydration Check — a face scan, urine-color scan and the clinical skin-pinch test, combined into one 0–100 verdict with every tool's finding explained. • Heart Recovery — a guided 3-minute test: rest, 30 camera-counted squats, recover. Your fitness as one honest index, tracked over time. • Morning Readiness — your night, scored from sleep, resting heart rate and HRV. All on-device — your face, scans and signals are never uploaded. No account needed. HYDRATETAP CARE — HYDRATION, GUIDED On a GLP-1 medication? Your thirst signal goes quiet — and dehydration, nausea and headaches follow. HydrateTap Care paces your fluids through the day, with extra support on your dose day, so your body never runs low. Eleven care plans for the moments hydration matters most: • GLP-1 Support — for Ozempic, Wegovy, Zepbound & Mounjaro users. A paced daily target, dose-day reminders, and a log for the side effects steady fluids can ease. • Kidney Stone Care — urology guidance puts one habit first: dilute urine, all day. Evenly paced 2.5–3 L days and an adherence report for your urologist. • UTI Support — in a randomized trial (JAMA Internal Medicine), an extra 1.5 L of water a day roughly halved recurrent infections. This plan turns that finding into a daily rhythm. • Fluid Limit — a reverse tracker for clinician-set restrictions (heart failure, dialysis): the ring fills toward your ceiling and warns you before you cross it. • Plus: POTS & Dysautonomia, Migraine Hydration, Bladder Training, Senior Care, Post-Bariatric, Medication Hydration, and Fasting Support. Every plan includes paced dose reminders, urine-color check-ins, symptom logging, and a clean one-page PDF report to bring to your next appointment. HydrateTap Care supports — never replaces — professional medical advice. It is not a medical device and does not diagnose or treat. Clinician-set targets always take priority, and if your fluids are restricted, use only the limit your clinician set. Check results are wellness estimates, not medical measurements. THE FASTEST WATER TRACKER • One-tap logging from beautifully designed Home Screen widgets • Live Activity & Dynamic Island — your progress, right on the Lock Screen • Apple Watch app with drink detection — log straight from your wrist • Smart reminders that notice hot days and workouts — and go quiet once you're done • Works offline — every sip syncs when you're back online BEAUTIFUL, PLAYFUL, MOTIVATING Watch living water rise, refract and celebrate every sip. Dive into The Depths — an underwater ocean that opens metre by metre as you drink. Meet the Water Guardians: nine keepers, each dressing the whole app in its own world — earn them by keeping your streak alive. Cheers with a friend: clink your phones and you both log a glass. FREE, CHECK & CARE The free version delivers what other apps hide behind paywalls: instant widget logging, smart reminders, streaks and full daily tracking — forever. HydrateTap Check (subscription, 7 days free) unlocks the Check instrument, trends, The Depths, all Water Guardians and Apple Health sync — or own it forever with a one-time lifetime purchase. HydrateTap Care adds every guided care plan, paced protocols and clinician reports — with a free week to try it. Install HydrateTap, place your widget, and log your first glass in one tap. Because when staying hydrated is this easy, you'll actually stick with it. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://hydratetap.com/privacy

Screenshots

H2O4 screens
HydrateTap4 screens

Verdict

The call

The clearest difference is update cadence: H2O at every 3 days against HydrateTap's every 6 months. HydrateTap's advantage is iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases 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 and HydrateTap sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

H2O ships an update every 3 days, HydrateTap every 6 months. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 8 level
H2O versus HydrateTap: the parameters behind the verdict, then further details
ParameterH2OHydrateTap
PriceFreeFree
Rating4.5 (166 ratings) — better—
Positive reviews84.9% of reviews—
Number of ratings166 — better—
Update frequencyEvery 3 days — betterEvery 6 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, Apple WatchiPhone, iPad, Apple Watch — better
Requires iOS26.018.0 — better
Further details — not scored
Size48 MB65 MB
Age rating12+12+
DeveloperLunarbits LLCEldin Mujovic

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

HydrateTap

Not enough reviews yet to summarise bugs or requests.

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
3 purchases

HydrateTap

Subscriptions1
  • HydrateTap Plus7 Days trial$0.997 Days
One-time2
  • Theme Pack$1.99
  • HydrateTap Pro$4.99

Questions

Is H2O free?
H2O is free to download, with in-app purchases available.
Is HydrateTap free?
HydrateTap is free to download, with in-app purchases available.
Do H2O or HydrateTap have ads?
Neither H2O nor HydrateTap shows ads.
Which is updated more often, H2O or HydrateTap?
H2O ships an update every 3 days, and HydrateTap every 6 months. Most recently, H2O was updated on October 29, 2026 and HydrateTap on October 28, 2026.

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