Comparison

Trinki vs Waterd

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

Head to head
About

Trinki

This app calculates your personalized daily water intake goal based on your body and environmental factors. It provides smart, timely reminders to help you stay hydrated and includes a map of public drinking fountains.

Highlights
  • Personalized hydration goals
  • Weather-aware goal adjustments
  • Smart, adaptive reminders
  • Fountain map for Germany
  • Progress tracking
  • Offline functionality
Features
Read full description

Drink enough — automatically. Trinki calculates your perfect daily goal and reminds you to drink at exactly the right moment. Evidence-based, weather-aware and 100% private — no account, no cloud, no subscription. WHY TRINKI? • Evidence-based — your goal starts from EFSA and DGE reference values, adjusted for weight, sex and activity. Sources right in the app. • Weather-smart — automatically raises your goal on hot days • Smart & adaptive — minute-precise reminders that know your pace and learn your drinking routine • 100% privacy — all data stays on your device FEATURES • Fountain map — over 22,000 public drinking fountains across Germany, free for everyone • Personalized hydration goals for your body • Reminders at the right moment — after every glass, Trinki replans the rest of your day • A good-morning greeting with the first reminder of the day • Automatic weather adjustment in the heat • Motivating progress view with a daily overview • Flexible glass sizes (50–1000 ml) • Quiet hours for your sleep time • Fresh design for the latest iOS ⌚ TRINKI PRO (optional one-time purchase, no subscription) • Apple Watch app — log glasses on your wrist, ring at a glance • Home and Lock Screen widgets — quick logging, including Shortcuts and Siri • Apple Health — your water lands next to your health data • Gentle reminders without sound • All future Pro features included EVIDENCE-BASED Based on EFSA and DGE reference values, with the sources linked in the app. Trinki accounts for: • Biological sex (women ~2.0 L, men ~2.5 L of beverages) • Body weight (±10 ml per kg) • Activity level (factor 1.0 to 1.6) • Ambient temperature YOUR DATA IS YOURS • No sign-up required • No cloud sync, no tracking • GDPR-compliant and fully offline • No subscription — Trinki Pro is a one-time purchase too HOW IT WORKS 1. Set up in 2 minutes 2. Trinki calculates your optimal daily goal 3. Get gentle reminders 4. Track with a single tap 5. Stay healthily hydrated! Made in Germany. Download Trinki and feel the difference.

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

Screenshots

Trinki4 screens
Waterd4 screens

Verdict

The call

The clearest difference is iOS requirement: Trinki at 18.5 against Waterd's 26.0. On price, update cadence, ads and in-app purchases 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. Trinki sells 4 one-off in-app purchases and Waterd sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Trinki ships an update every 5 days, Waterd every 3 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

Scorecard1 real difference · 9 level
Trinki versus Waterd: the parameters behind the verdict, then further details
ParameterTrinkiWaterd
PriceFreeFree
Rating—4.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—1 — better
Update frequencyEvery 5 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS18.5 — better26.0
Further details — not scored
Size11 MB11 MB
Age rating4+4+
DeveloperNoel WeinbergWenjie Zhang

In-app purchases

4 purchases

Trinki

One-time4
  • Espresso$1.99
  • Cappuccino$3.99
  • Trinki Pro$3.99
Show 1 more
  • Coffee & Cake$5.99
3 purchases

Waterd

Subscriptions2
  • Waterd Premium$1.991 Month
  • Waterd Premium$4.991 Year
One-time1
  • Waterd Premium Lifetime$7.99

Questions

Is Trinki free?
Trinki is free to download, with in-app purchases available.
Is Waterd free?
Waterd is free to download, with in-app purchases available.
Do Trinki or Waterd have ads?
Neither Trinki nor Waterd shows ads.
Which is updated more often, Trinki or Waterd?
Trinki ships an update every 5 days, and Waterd every 3 days. Most recently, Trinki was updated on October 30, 2026 and Waterd on October 25, 2026.

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