Comparison

Trinki vs Flow

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 scientific guidelines and adjusts it for weather conditions. It provides smart, adaptive reminders throughout the day and offers a map of public drinking fountains.

Highlights
  • Personalized hydration goals
  • Weather-aware goal adjustments
  • Smart and adaptive reminders
  • Fountain map for Germany
  • Progress tracking
  • Flexible glass sizes
  • Quiet hours
Features
Read full description

Drink enough — automatically. Trinki calculates your perfect daily goal and reminds you to drink at exactly the right moment. Science-based, weather-aware and 100% private — no account, no cloud, no subscription. WHY TRINKI? • Scientifically precise — your goal follows EFSA/DGE guidelines based on weight, sex and activity • 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 SCIENCE-BASED Based on EFSA and DGE recommendations. 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

Flow

Features
Read full description

LOG YOUR WATER INTAKE Track every glass, bottle, or cup with just a tap. Custom drink sizes or quick presets. Never forget to hydrate with smart notifications throughout the day. PERSONALIZED HYDRATION GOAL Set your daily target based on your weight and activity level. Adjust anytime. The app adapts to your needs, not the other way around. WATCH YOUR PROGRESS Build hydration streaks and celebrate consistency. Detailed stats show your weekly intake, best days, and trends over time. Stay motivated with visual progress tracking. APPLE HEALTH & APPLE WATCH Sync water intake to Apple Health automatically. Log drinks straight from your wrist with full Apple Watch support. SMART REMINDERS Never miss a sip. Customizable notifications keep you on track without being annoying. Set your schedule, we'll handle the rest. PRIVACY FIRST All your data stays on your device. Export anytime. No account required. PAY ONCE, YOURS FOREVER No subscriptions, no ads, no in-app purchases. One price, unlimited hydration.

Screenshots

Trinki4 screens
Flow4 screens

Verdict

The call

The clearest difference is price: Trinki at Free against Flow's $3.99. Flow's advantage is in-app purchases (none vs 4) and iOS requirement (16.2 vs 18.5). On update cadence, ads and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Trinki is free to download; Flow costs $3.99 up front. Trinki sells 4 one-off in-app purchases. Flow asks for nothing beyond the download.

UpkeepUpdate frequency

Trinki ships an update every 4 days, Flow every 5 days. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.

Scorecard3 real differences Ā· 5 level
Trinki versus Flow: the parameters behind the verdict, then further details
ParameterTrinkiFlow
PriceFree — better$3.99
Positive reviews100.0% of reviews—
Update frequencyEvery 4 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, Apple WatchiPhone, iPad, Apple Watch — better
Requires iOS18.516.2 — better
Further details — not scored
Size10 MB40 MB
Age rating4+4+
DeveloperNoel WeinbergLOKRIS

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
None

Flow

No in-app purchases

Questions

Is Trinki free?
Trinki is free to download, with in-app purchases available.
Is Flow free?
Flow costs $3.99, with no in-app purchases.
Do Trinki or Flow have ads?
Neither Trinki nor Flow shows ads.
Which is updated more often, Trinki or Flow?
Trinki ships an update every 4 days, and Flow every 5 days. Most recently, Trinki was updated on October 5, 2026 and Flow on October 1, 2026.

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