Calculators and timers to help you build daily habits — water intake, breathing, sleep cycles, exercise pacing, and more. All free, no signup.
Box, 4-7-8, equal, coherent, Wim Hof — guided breathing in one timer.
How much water you need per day — based on body weight, activity, and climate.
Find your ideal bedtime based on 90-min sleep cycles.
Classic 25/5 focus cycles with daily-count tracking.
Convert steps to miles, kilometres, and calories burned.
30-day progressive challenge + free hold timer.
GTD + Atomic Habits 2-minute countdown.
Karvonen + simple HRmax — find your 5 training zones.
Turn vague intentions into specific, measurable, dated goals + a supporting habit.
Interval timer for the 8-stretch beginner routine.
10 widely-believed productivity and habit claims — each with the research that disproves it.
The tools above help you measure or pace a behavior. To actually build a daily habit around it, the missing piece is consistency — and consistency comes from a visible streak. HabitBox gives you that streak in one tap, no account, free on iOS and Android.