Free online health and lifestyle tools

Calculates waist-to-hip, waist-to-height and visceral adiposity index from body measurements.

Charts expected weight over time after cutting intake, using the Hall-Chow dynamic model.

Open source family meal planner that builds grocery lists by store section, plus an AI eBay listing helper.

Suggests meals from your dietary preferences, calorie target and allergies using templates plus AI recommendations.

Meditation timer with preset durations, guided instructions, ambient sounds and session statistics.

Habit tracker PWA that works offline and needs no login.

Works out your VDOT fitness score from a race result and the training paces that go with it.

Plays a sound at set intervals to remind you to pause, breathe and take a mindful break.

Simple habit tracking app shipped as an offline-oriented standalone PWA, aimed at mobile screens.

PWA for working out coffee-to-water amounts, timing a pour-over and following brew recipes offline.

Calculates how much coffee to use for a brew, even without a scale, and works offline as a PWA.

Customizable interval timer for boxing, MMA and similar training, with progress indicators and audio alerts.

Estimates body fat percentage with the US Navy method and keeps your values in the browser.

Client-side TDEE and macro calculator with weight projections, diet presets and weight logging.

Counts bicep curls from your webcam using MediaPipe pose tracking in the browser.

Animated pacer that walks you through the 4-7-8 breathing pattern for calming down.

Shows the typical awake window for a baby's age and when the next nap may be due.

Installable web app for designing homebrew beer recipes, in Spanish.

Chinese-language calorie tracker: photograph a meal, an AI model names the dish, and calories are tracked against a daily target.

Interactive breathing exercise that paces inhales and exhales to help manage stress.

Chinese-language meal picker that asks about taste preferences and the time of day, then suggests what to eat next.

PWA meditation timer offering interval bells, chimes and an optional soundtrack.

Switches between treadmill mph settings and min/mile pace, with an incline adjustment option.

Shows which plates to load on a barbell and totals the weight with a drawn diagram.