How does Trinki calculate my daily water intake?

Trinki uses recommendations from the EFSA (European Food Safety Authority). The calculation considers your biological sex, body weight (35ml per kg), and activity level (factor 1.0–1.6).

Is Trinki really free?

Yes, Trinki is completely free on the App Store. No hidden costs, no in-app purchases, no subscriptions.

Is my data sent to any servers?

No. All data stays exclusively on your device. Trinki has no cloud sync, no tracking, and no analytics. The app works completely offline and is 100% GDPR compliant.

What does weather-intelligent mean?

Trinki automatically adjusts your daily goal based on the current temperature. On hot days, you'll be reminded more frequently and your target increases by up to 30% to keep you optimally hydrated.

Health & Fitness

Your smart hydration companion.

Science-backed Weather-intelligent 100% private Free

★★★★★ 5.0 on the App Store · Free · 2.2 MB

Trinki App main screen — progress display showing 2 of 11 glasses

Everything you need.
Nothing you don't.

Trinki focuses on what matters — and does it exceptionally well.

Personal Daily Goal

Calculated using EFSA standards based on your weight, sex, and activity level. Science-backed, not guesswork.

Weather-Intelligent

On hot days, Trinki automatically increases your goal by up to 30%. You get reminded more when it matters most.

Smart Reminders

Gentle notifications that adapt to your rhythm. With quiet hours for nighttime — no 3 AM wake-ups.

Track Your Progress

Clear daily overview with visual progress tracking. See at a glance how close you are to your goal. Every sip counts.

Flexible Glass Sizes

From 100ml to 500ml — choose the glass sizes that fit your daily routine. Fully customizable to your drinking style.

100% Private

No registration. No tracking. No cloud. Your data stays on your device — GDPR compliant and fully offline.

Experience Trinki up close.

Trinki weather integration — automatic temperature adjustment

Adapts to the weather.

Trinki uses Apple WeatherKit to automatically adjust your daily goal based on temperature. On hot days, you drink up to 30% more — with moderate or strong adjustments, just as you prefer.

Reminders that think ahead.

Choose between hourly or smart reminders that adapt to weather and time of day. With quiet hours from 10 PM to 6 AM — for undisturbed sleep.

Your profile, your goal.

Age, weight, sex, and activity level — Trinki calculates your individual daily target on a scientific basis. From sedentary to very active, everything is accounted for.

Backed by science.

Trinki uses recommendations from the EFSA (European Food Safety Authority) for your personalized hydration calculation.

2.0L

Women

EFSA reference value

2.5L

Men

EFSA reference value

35ml

per kg

Body weight / day

Your data belongs to you.

No compromises on privacy.

✓ No registration required
✓ No tracking or analytics
✓ No cloud synchronization
✓ 100% GDPR compliant
✓ Fully offline capable
✓ Only 2.2 MB — instant ready

What users say.

★★★★★

"It's hard enough to drink water, this app motivates me!"