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Hydration & electrolytes · Patch / sensor · by hDrop Tech
hDrop Gen 2
A reusable sweat sensor that reads real-time fluid, sodium and potassium loss for athletes — personalized hydration from your own sweat.
Jun 2023hDrop Gen 2
Maturing3 yr old
API access: No Raw data access: Yes — restricted Open source: No public repo
Clinical value
35/100
Sweat-loss sensing
Empowerment
48/100
App data, decent access
Everyday value
60/100
Long battery, athletic use
A reusable, skin-worn sweat sensor that tracks real-time sweat loss, sodium, potassium and skin temperature during exercise, validated at 92.5% for sweat loss and 87% for sodium loss, with a 120-hour battery.
What it measures
Real-time sweat volume loss, sodium and potassium loss, and skin temperature during workouts, turned into personalized hydration guidance.
Regulatory status
Consumer athletic device; general-wellness, not a clinical diagnostic.
Validation & accuracy
Validated at ~92.5% for sweat loss and ~87% for sodium loss — strong for the category.
Data control & export
Raw data: restricted — metrics surface in the app with reasonable access for athletes; no full open API.
Wearability & battery
A light, reusable patch worn during training; 120-hour battery means little charging friction.
Cost & access
Consumer/athletic pricing around $249.99.
Who it serves
Endurance and team-sport athletes wanting individualized hydration and electrolyte strategies.
Who is left out or burdened
Wellness-only; athletic niche; data not fully open.
✓ Strengths
- Real-time sweat, sodium, potassium loss
- 120-hour battery
- Validated ~92.5% sweat / 87% sodium
- Personalized hydration guidance
✕ Weaknesses
- Wellness-only
- Athletic niche
- No open API
- Premium price
35
Why this clinical score. Useful electrolyte sensing but general-wellness and sport-specific, so the clinical score stays modest.
48
Why this empowerment score. App access is reasonable and battery long, but without an open API empowerment sits mid.
60
Why this everyday score. Light reusable wear and long battery make it easy to use across training, giving good everyday value for athletes.
Latest news
Reviews & coverage
Reviewers in the endurance space find hDrop a genuinely useful way to personalize hydration, citing solid validation for sweat and sodium loss and a very long battery. The knocks are the athletic niche, price and wellness-only scope.
Summary is a draft synthesis of public coverage, not an endorsement. Links open a search of each outlet.
Reddit communities
Independent user communities where this device (or its category) is discussed.
Get it · manuals & support
Draft profile · public-source review, June 2026 · scores describe direction and degree, not buying advice. News, links, and prices change — verify with the manufacturer. Image is representative.