hDrop App vs Day Zero

hDrop is the first wearable sweat sensor designed to extract data from your sweat during exercise. Independently validated research shows that hDrop is the world’s most accurate wearable sweat sensor, helping athletes understand how much fluid and sodium they lose while training. Whether you are preparing for a marathon, triathlon, cycling event, or intense training session, hydration strategy matters. Generic hydration advice does not account for the fact that every athlete sweats differently. hDrop helps you personalize your hydration based on real physiological data. Measure What You Lose in Sweat hDrop continuously monitors your sweat during exercise and provides insights that help you understand your body's hydration demands. Track key metrics including: • Sweat Loss – Estimate how much fluid you lose during training • Sweat Sodium Loss – Understand electrolyte loss to guide sodium intake • Sweat Rate Trends – Learn how your hydration needs change with intensity and environment Build Your Personal Hydration Strategy Use your sweat data to create a hydration plan tailored to your physiology. With the hDrop app you can: • Analyze sweat loss across workouts • Understand sodium losses during exercise • Compare sessions in different weather conditions • Improve hydration planning for races and long training sessions Designed for Endurance Athletes hDrop is built for athletes who depend on hydration precision: • Triathlon • Marathon and running • Cycling • Trail and ultra endurance sports • Heat training and high-intensity workouts Scientifically Validated Technology hDrop technology has been independently validated by university research, demonstrating high accuracy in estimating sweat loss and sodium loss during exercise. The system was developed with a focus on translating laboratory sweat testing into a wearable field solution for athletes. Unlock Advanced Features with hDrop Lab The optional hDrop Lab membership provides deeper analysis tools, advanced hydration insights, and personalized hydration guidance based on your sweat profile. Hydrate smarter. Perform better. DISCLAIMER: hDrop is not intended to diagnose any health condition. hDrop is not a medical device. Please do not take any critical decisions based on hDrop's current data. Optional Add-On Terms: hDrop Lab is available as an optional add-on auto-renewable subscription. Payment will be charged to your Apple ID account at confirmation of purchase. The optional subscription automatically renews unless canceled at least 24 hours before the end of the current period. You can manage and cancel your subscription in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://hdroptech.com/privacy-policy

One number per habit: how many days since you last showed up. Keep it at zero. That’s the whole game. Day Zero is accountability without the noise — no streak anxiety, no social feeds, no accounts. Just a big honest number that goes green when you show up and red when you don’t, on your Home Screen where you can’t ignore it. THE RITUAL Open to Today: what’s owed, what’s done, one tap to settle up. Every habit gets its own board — the number, the week’s dots, and a line of copy with actual personality. DAILY OR SCHEDULED Run flexible targets (4× a week) or pin specific weekdays. Planned rest days get calm recovery copy instead of guilt — and if your weekly goal is mathematically at risk, the card says so out loud. GOLD WEEKS Hit your weekly target and everything turns gold. Win EVERY habit’s week and you’ve earned a Perfect Week — with a shareable gold poster. Sharing is earned here, not ambient. WIDGETS THAT WORK Log with one tap from the Home Screen or Lock Screen. A single-habit widget in every size, plus an all-habits overview that goes gold on perfect weeks. LIFE HAPPENS Pause any habit: the number stays honest, the guilt switches off, and a gentle check-in asks when you’re ready. Logging anything brings you back instantly. A VOICE, NOT A DASHBOARD Hundreds of hand-written lines that rotate daily and never repeat until the pool runs dry. Optionally, let on-device Apple Intelligence write fresh lines from your real context — your gap, your week, your goal. Tap any card to flip it: your “why” waits on the back in a gold frame. PRIVATE BY ARCHITECTURE No accounts. No analytics. No servers. Everything lives on your phone. Habits: running, reading, meditation, stretching, strength, swimming, cycling, rowing — or build your own with an 84-icon library.