The Stomach Buffer
Fluid doesn't reach your cells instantly – it travels through the stomach into the small intestine first. Acva calculates this absorption rate continuously. You watch the stomach wave rise and slowly absorb.
DEVELIST / ACVA
Forget the glasses. Your Hydration Index knows better.
Acva runs in the background and calculates your Hydration Index automatically – adapted to your biology and your daily life, backed by medical research.
Coming soon to the App Store
Why conventional water apps don't know enough.
When you drink a litre of water, it lands in your stomach first – not in your cells. When you train, you lose fluid faster than any rule of thumb accounts for. Normal trackers ignore that. They count. Acva understands.
CORE
Activity Decay
When you train, you sweat more than you think. Acva pulls your activity data after your workout and recalculates your increased needs retroactively – precise to the minute.
Intelligent Heat Decay
Your body breathes and sweats – and in heat, you lose fluid faster than you notice. Acva dynamically adjusts your hourly loss rate to the outside temperature.
Creatine Adjustment
Creatine binds water in your muscles. Acva knows that – and automatically increases your needs when you track creatine.
Weight-Based Needs
No two people are the same. Acva calculates your baseline needs directly from your body weight – not from a rule of thumb.
Beverage Hydration Index
Coffee isn't water. Acva rates every drink by its true hydration value – based on the scientific BHI.
Development Roadmap
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Phase 01// active
UI/UX & Core Algorithm
The foundation. We're building the calculation engine and interface – precise, lean, uncompromising.
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Phase 02
Private Beta via TestFlight
First real users, real feedback. A closed group tests Acva under real conditions.
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Phase 03
Apple Health Integration
Acva connects to your health data – for even more precise calculations without manual effort.
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Phase 04
Public App Store Launch v1.0
Acva is ready. For everyone.
No games. No streaks. Pure science.
Hydration is biology, not a game. That's why Acva has no streaks, no badges, no artificial incentives. Just your Hydration Index – and the knowledge of what it means.