Comparison

Waterd vs OmizuTomo

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

Head to head
About

Waterd

This app automatically sets personalized daily water intake goals based on activity and weather, using on-device AI. It offers quick logging via widgets and notifications, with weekly insights for reflection. All data remains private and on your device.

Highlights
  • AI-powered personalized hydration goals
  • On-device processing for privacy
  • Quick logging via widgets and notifications
  • Weekly hydration insights
  • HealthKit integration
  • No ads or tracking
Features
Read full description

The hydration tracker you never open. Waterd uses Apple Intelligence on supported devices to set your daily water goal based on your activity, the weather, and how you've been hydrating this week — automatically, on-device, no cloud. On devices without Apple Intelligence, Waterd uses a built-in formula based on your weight, activity, and weather forecast. Then it gets out of your way. Tap your bottle from the Home Screen widget, the Lock Screen, the Dynamic Island, your Apple Watch, or a notification action. Each tap is one drink, logged in under five seconds. The app exists for weekly reflection, not daily logging. PREMIUM — three ways to unlock • Monthly — $1.99/month with a 7-day free trial • Yearly — $4.99/year • Lifetime — $7.99 one-time purchase All three unlock the same premium features: • Personalized daily hydration goals that account for your activity and the weather • Weekly insights that explain your hydration patterns in plain English • Runs entirely on-device where Apple Intelligence is available ZERO FRICTION • Home Screen interactive widgets • Lock Screen widgets and StandBy support • Apple Watch complications and Smart Stack widget • Live Activity in the Dynamic Island • Notification action buttons that log without opening the app PRIVATE BY DESIGN • All data stays on your device. No accounts, no email collection. • Apple Intelligence runs entirely on-device where available. • HealthKit-compatible. Your water intake syncs with Apple Health. • No tracking. No ads. No social feeds. HOW GOALS ARE CALCULATED Waterd suggests goals based on widely-cited references (National Academies of Sciences, Mayo Clinic, ACSM, CDC). Full sources and citations are inside the app under Settings → How goals are calculated, and from every screen where the goal is shown. Waterd is a general wellness app and is not a medical device. SUBSCRIPTION TERMS Monthly and Yearly are auto-renewable subscriptions charged to your Apple ID. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Free trial converts to a paid subscription at the end of the trial. Manage or cancel in Settings → Apple ID → Subscriptions. Terms of Use: https://www.tapwaterdata.com/terms/app Privacy Policy: https://www.tapwaterdata.com/privacy/app

About

OmizuTomo

This application serves as a personal hydration companion, sending timely reminders to ensure you drink enough water throughout the day. It helps you maintain optimal hydration levels for better health and well-being.

Highlights
  • Hydration reminders
  • Water intake tracking
  • Simple interface
  • Supports Apple Watch and iPhone
Features
Read full description

OmizuTomo is your water friend. A simple app that reminds you to drink water and stay hydrated.

Screenshots

Waterd4 screens
OmizuTomo2 screens

Verdict

The call

The clearest difference is rating: OmizuTomo at 5.0 against Waterd's 4.0. OmizuTomo also leads on in-app purchases (none vs 3). Waterd's advantage is update cadence (every 3 days vs weekly). On price, ratings volume, 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. Waterd sells 3 in-app purchases, starting at $1.99 per month. OmizuTomo asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OmizuTomo holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Waterd ships an update every 3 days, OmizuTomo weekly. Both last shipped on October 31, 2026.

Scorecard4 real differences · 5 level
Waterd versus OmizuTomo: the parameters behind the verdict, then further details
ParameterWaterdOmizuTomo
PriceFreeFree
Rating4.0 (1 ratings)5.0 (1 ratings) — better
Number of ratings11
Update frequencyEvery 3 days — betterWeekly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS26.0 — better26.5
Further details — not scored
Size11 MB1 MB
Age rating4+4+
DeveloperWenjie ZhangAllen Collins

In-app purchases

3 purchases

Waterd

Subscriptions2
  • Waterd Premium$1.991 Month
  • Waterd Premium$4.991 Year
One-time1
  • Waterd Premium Lifetime$7.99
None

OmizuTomo

No in-app purchases

Questions

Is Waterd free?
Waterd is free to download, with in-app purchases available.
Is OmizuTomo free?
OmizuTomo is free to download, with no in-app purchases.
Which has better reviews, Waterd or OmizuTomo?
OmizuTomo is rated higher. Waterd averages 4.0 out of 5 from 1 ratings, while OmizuTomo averages 5.0 from 1 ratings.
Do Waterd or OmizuTomo have ads?
Neither Waterd nor OmizuTomo shows ads.
Which is updated more often, Waterd or OmizuTomo?
Waterd ships an update every 3 days, and OmizuTomo weekly. Most recently, Waterd was updated on October 31, 2026 and OmizuTomo on October 31, 2026.

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