Comparison

hDrop App vs Dromeas

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

hDrop App

This wearable sensor tracks fluid and sodium loss through sweat during exercise. It provides personalized hydration insights based on your unique physiology, helping endurance athletes optimize their performance. Analyze sweat loss, sodium intake, and rate trends to build a tailored hydration strategy.

Highlights
  • Wearable sweat sensor
  • Fluid and sodium loss tracking
  • Personalized hydration strategy
  • Sweat rate trend analysis
  • Workout data analysis
  • Comparison across conditions
Features
Read full description

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

About

Dromeas

Features
Read full description

Dromeas is a simple, focused running calculator — everything you need to plan a run or check your numbers after one, with no ads, no account, and no tracking. CORE CALCULATOR Enter any two of pace, time, and distance to instantly get the third. Quick-select common race distances from 1K to Spartathlon, switch between km and mi with one tap, and scroll through wheel pickers built for speed. SPLITS See a full kilometer-by-kilometer or mile-by-mile split breakdown for any pace and distance, generated instantly. FAVORITES Save any pace/time/distance combination you use often — a goal race pace, a recovery run pace, whatever you come back to — and reload it in one tap. MORE TOOLS • Race Predictor — estimate your finish time at any distance from a recent race result, using the Riegel formula. • Training Paces — get Easy, Marathon, Threshold, Interval, and Repetition paces from your threshold pace. • VO2max Estimator — estimate your aerobic fitness from a recent race performance. • Heart Rate Zones — get your five training zones from your max or threshold heart rate. • Critical Speed — find your sustainable speed and D′ from two or more race results. • Grade-Adjusted Pace — see your flat-equivalent effort on a hilly route, using a real physiological model of the energy cost of climbing and descending (Minetti et al.). • Calories Burned — estimate energy expenditure from your weight, distance, and time, using the ACSM running equation. ON YOUR WRIST A full Apple Watch app: turn the Digital Crown to read one pace four ways at once, work out a pace from a distance and a time, and reach your Favorites straight from your wrist. A watch face complication keeps your last pace one tap away. MAKE IT YOURS Choose Light, Dark, or System appearance, and pick an accent color — Blue, Orange, Green, Yellow or Magenta. PRIVATE BY DESIGN Dromeas makes no network requests. There's no account, no analytics, and no ad tracking. Your Favorites and preferences stay on your device — the only place they ever travel is your own Apple Watch, over Apple's local connection, never to a server. Read the full privacy policy in the app or on our website. Whether you're pacing a workout, predicting a race time, or just doing quick running math, Dromeas gets you the number and gets out of your way.

Screenshots

hDrop App4 screens
Dromeas4 screens

Verdict

The call

The clearest difference is in-app purchases: Dromeas at none against hDrop App's 2. hDrop App's advantage is iOS requirement (15.6 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. hDrop App sells 2 in-app purchases, starting at $12.99 per month. Dromeas asks for nothing beyond the download.

UpkeepUpdate frequency

hDrop App ships an update fortnightly, Dromeas weekly. The most recent releases landed on October 18, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 8 level
hDrop App versus Dromeas: the parameters behind the verdict, then further details
ParameterhDrop AppDromeas
PriceFreeFree
Rating3.8 (12 ratings) — better—
Positive reviews43.8% of reviews—
Number of ratings12 — better—
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS15.6 — better18.0
Further details — not scored
Size60 MB4 MB
Age rating4+4+
DeveloperhDrop Technologies Inc.Roberto Zanon

In-app purchases

2 purchases

hDrop App

Subscriptions2
  • hDrop Lab7 Days trial$12.991 Month
  • hDrop Lab7 Days trial$89.991 Year
None

Dromeas

No in-app purchases

Questions

Is hDrop App free?
hDrop App is free to download, with in-app purchases available.
Is Dromeas free?
Dromeas is free to download, with no in-app purchases.
Do hDrop App or Dromeas have ads?
Neither hDrop App nor Dromeas shows ads.
Which is updated more often, hDrop App or Dromeas?
hDrop App ships an update fortnightly, and Dromeas weekly. Most recently, hDrop App was updated on October 18, 2026 and Dromeas on October 5, 2026.

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