16 free tools

Measure, calm, focus. All free.

Calculators, timers and self-checks that pair with your health systems.

Private: nothing you enter leaves your device

Calculators

⚖️

BMI calculator

Your body mass index and healthy weight range.

Open 🔥

Calorie calculator

Daily calories to maintain, lose or gain.

Open 🥚

Protein calculator

How much protein you need, per day and per meal.

Open 💧

Hydration calculator

How much water does your day really need?

Open ❤️

Heart-rate zones

Your 5 training zones in beats per minute.

Open 🚶

Walking calculator

Steps, distance and calories from your walk.

Open 📏

Waist-to-height ratio

A simple, powerful health-risk check.

Open 🧮

Body fat estimator

Estimate body fat with a tape measure.

Open ☕

Caffeine calculator

Your daily caffeine and the best cutoff time.

Open 🌙

Sleep cycle calculator

Wake up between cycles, not in the middle of one.

Open

Timers & guides

🌬️

Guided breathing

Two minutes to calm your nervous system.

Open 🧘

Meditation timer

A calm timer with soft bells and prompts.

Open 🎯

Focus timer

Pomodoro sessions for deep, calm focus.

Open

Self-checks & trackers

🌊

Stress self-check

8 questions to see how stress affects you.

Open 😴

Sleep debt calculator

How much sleep you owe your body this week.

Open ✅

Habit tracker

Tick one box a day. Watch the chain grow.

Open

These tools give general estimates for educational purposes. They are not medical advice and do not replace a qualified health professional.