Tools
Free calculators, checklists and quizzes. No sign-up, nothing stored, everything runs in your browser.
Acute:chronic workload ratio calculator
Calculate your ACWR from 7-day and 28-day training load. Includes the sweet-spot bands (0.80–1.30) and what values above 1.50 mean for injury risk.
Aura quiz: what's your archetype?
Free 8-question aura quiz: Energy, Warmth and Polish name one of eight archetypes. No photo, no sign-up. Then get Presence's Aura Score, free on-device.
Color season calculator
Free 8-question color season quiz: undertone, eyes, hair and contrast point to one of 12 seasons, from Light Spring to Bright Winter. No photo, runs in your browser.
First impression checklist
Free 15-point first impression checklist: grooming, eye contact, expression, outfit and posture. Instant 0–100 estimate — no photo, nothing uploaded or stored.
Normal HRV by age
Normal HRV by age and sex from a 1,906-person study: average SDNN and RMSSD for ages 25–74, plus a lookup to see where your Apple Watch HRV sits.
Presence Score breakdown calculator
See how Appearance 30%, Aura 25%, Face 20%, Brand 15% and Physicality 10% combine into a 0–100 Presence Score, and which category moves it fastest.
Live push-up counter (camera)
Count push-ups with your camera, free in your browser. A 60-second test that tracks elbow angle on-device, rates you against push-up norms and makes a share card.
How many push-ups by age
Push-up test norms by age and sex, with percentile bands. See where your max set ranks and what counts as a valid repetition.
Readiness score calculator
Estimate a 0–100 daily readiness score from your HRV, sleep duration, resting heart rate and recent training load, and see how each input moves the number.
The real cost of every recovery tracker
Total cost of ownership for Whoop, Oura, Athlytic, Bevel, Gentler Streak and Body Vitals over 1–10 years. Hardware plus subscription, calculated.
Normal resting heart rate by age
Normal resting heart rate by age and sex from CDC NHANES data on 35,000+ people: percentiles for children and adults, the 60–100 bpm adult range, and a quick lookup.
Will my Apple Watch get Readiness?
Check if your Apple Watch supports Apple's new Readiness score. Apple lists only Series 12 and Ultra 4; watchOS 27 alone does not add it to older watches.
Zone 2 Heart Rate Calculator
Zone 2 heart rate calculator: enter your age to get your Zone 2 bpm range with Tanaka (208 − 0.7 × age). How to calculate your Zone 2 heart rate.