Connects to your wearable, reads your body data, and tells you exactly what to drink — before you fade on court.
Free on iOS. We'll send your TestFlight invite.Thirst lags behind dehydration by 1-2% body mass. That's less stamina, slower reactions, and higher cramp risk — before you even notice.
WHOOP, Apple Watch, or Garmin. Flow pulls your recovery score, strain, sleep quality, and HRV automatically.
Over 7 days, Flow learns your baseline — how you hydrate, when you forget, and how your body responds to heat, activity, and sleep.
Before your match, after your session, every morning — Flow tells you what to drink, how much, how fast, and why.
Tap any factor in the app to see the science. Flow shows its work.
Poor sleep suppresses vasopressin, causing 16-59% higher odds of dehydration the next day.
Low HRV means your nervous system is stressed. Dehydration reduces blood plasma volume, making it worse.
WHOOP says strain 16. Flow says you lost ~1.2L of sweat — here's the recovery protocol.
Court surfaces radiate heat 5-10°C above air temp. Flow adjusts your target in real time.
Squash at 1,300ml/hr sweat rate is not tennis at 1,100. Flow knows the difference.
Water alone isn't enough. Flow tracks sodium, potassium, and magnesium — and tells you when to add electrolytes.
Connect your wearable, let Flow learn your body, and see the difference on court.
iOS only. Free during beta. We'll send your invite.