Science The App Heat IQ™

Know Before You Go.

Your Personal Heat
& Hydration Coach

Personalized Heat Intelligence for every outdoor adventure. Whether you're hiking, running, or cycling, Suayves helps you understand today's conditions before you head out.

No account required  ·  No user data collected. Ever.

Download on the App Store Get it on Google Play
Heat IQ™ for Organizations →
Suayves History and Tuning screen with logged sweat rates compared to the model
Suayves app home screen with live WBGT forecast, activity settings, and hydration plan
Suayves Settings screen for height, weight, age, sex, fitness, and heat acclimatization

Free App

Heat Intelligence for Every Adventure

The Suayves app gives runners, hikers, cyclists, dog walkers, and anyone heading outdoors a real-time WBGT reading and a personalized hydration plan — built around your body and the actual conditions outside.

  • 💧
    Personalized Hydration Plans
    Bottle-by-bottle pacing built from your height, weight, age, fitness, and heat acclimatization, plus your activity type, pace, terrain, clothing, and sun exposure.
  • 🚴
    Uses Your Real Fitness Numbers
    Enter your VO₂max or cycling FTP and Suayves sets your fitness level from it, and uses it to sharpen your estimated core temperature. If you don't have those numbers, a simple 1–10 slider works too.
  • 🔁
    Learns From Your Sweat
    Log your activities and the app compares your actual sweat rate to its model, then tunes your plan to match.
  • 🌡️
    Real-Time WBGT
    The same metric used by the US military and NCAA, now in your pocket for every workout.
  • 📊
    24-Hour Forecast Chart
    See WBGT, temp, humidity, and wind trending across your planned activity window.
  • ⚡
    Environmental Heat Alerts & Flag System
    Color-coded heat flags and notifications when conditions cross into dangerous territory.

No account required. No user data collected. Ever.

Download on the App Store Get it on Google Play

Elite athletes have teams dedicated to heat and hydration preparedness.

Everyone else deserves that opportunity too.

That's why we built Suayves.

Trusted By
Race Across America
Official Hydration Partner
Race Across America
Jeremy Wilson Foundation
Hydration Partner
Jeremy Wilson Foundation

The Science Behind Suayves

Built on Military & Sports Medicine Research

WBGT is the gold standard for heat stress assessment used by the US military, NCAA, and OSHA. Suayves brings this professional-grade metric to every athlete and worksite.

🌡️
Wet Bulb Globe Temperature
WBGT accounts for temperature, humidity, wind speed, and solar radiation simultaneously: the four factors that determine how well your body can cool itself in real conditions.
💧
Personalized Sweat Rate
Your hydration needs depend on both your physiology (height, weight, fitness level) and your activity intensity. Suayves builds a unique profile so recommendations adapt to you, not just the weather.
⚡
Real-Time Adaptive Plans
As conditions change, your hydration plan updates automatically. Suayves integrates live weather data to keep your plan accurate throughout your activity or shift.
KBYG app showing 7-day forecast with Black flag
Free · No Download · No Account
Know Before You Go
Pin your trail, worksite, or stadium. Check WBGT, heat flags, and hydration guidance for locations worldwide. Save multiple spots. No account needed.
⚑
Color-Coded Heat Flags
Military-grade WBGT thresholds from Very Cool to Black flag.
📍
Pin Multiple Locations
Save your trail, job site, or venue and check conditions any time.
📅
7-Day Forecast
Plan your week with daily WBGT highs and heat flag outlook.
Open KBYG →
Powered by Suayves Heat IQ™

How It Works

Science-Driven. Real-Time. Simple.

1
Set Your Profile
Enter your physiology including height, weight, fitness level, and activity type to build your baseline.
2
Live Weather Data
Suayves pulls real-time temperature, humidity, solar radiation, and wind for your exact location.
3
WBGT Assessment
Set your activity and intensity level. Our engine evaluates this against current WBGT conditions using OSHA, ACSM, and military heat stress standards.
4
Your Plan, Instantly
Receive a personalized hydration schedule, environmental heat alerts, and recommendations updated as conditions change.
WBGT
Gold Standard
Used by US Military, NCAA & OSHA
24h
Forecast Horizon
Hourly hydration pacing ahead of your activity
5-day
Alert Preview
Know heat risk periods before they arrive
Free
Free App
iOS & Android, no account required

Free Tool

Know Before You Go

Real-time WBGT, heat flags, and a personalized hydration plan for any location in the world. No account required.

Check Conditions → Our Thinking

Stay Safe Out There

Real-time WBGT, personalized hydration plans, and heat flags for any adventure. Free, no account required.

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