Name: Activity Feels – Perceived Temperature by Effort
Rating: 4.6 (11 reviews)
Author: EnduranceForgeLabs

Activity Feels turns current weather into a simple 0–10 difficulty score for outdoor training.

Because the same conditions feel different during an easy walk and a hard workout, the app calculates three scores:

• LOW — walking and easy sessions  
• MODERATE — brisk walking and Zone 2 running  
• VIGOROUS — tempo, intervals and hard efforts  

A lower score means the weather should be easier to train in. Higher scores indicate more challenging or potentially severe heat or cold.

CURRENT CONDITIONS

The main screen shows all three scores together, along with the current air temperature and weather description. An animated background reflects conditions such as clear skies, clouds, rain, snow, wind and storms, including day and night variations.

FACTORS

Activity Feels considers the environmental factors that affect how your body manages heat:

• Air temperature  
• Humidity  
• UV index  
• Altitude  

WHY WIND IS NOT INCLUDED

Wind can change dramatically over short distances and is easily blocked by buildings, trees and terrain. Because it cannot provide consistent, location-specific guidance, it is deliberately excluded from the score.

HOW IT WORKS

Activity Feels starts with a perceived-temperature model, adjusts it for environmental conditions and workout intensity, then converts the result into a 0–10 training-difficulty score.

A dedicated How It Works page explains the methodology and purpose in plain language.

NAVIGATION

Swipe or press START to move between:

• The three-level difficulty scale  
• Current weather factors  
• How It Works  

AT A GLANCE

Add the glance to see all three difficulty scores and the current weather without opening the full app.

DETAILS

• Runs entirely on your watch  
• No phone account or subscription required  
• Honors your watch’s °C/°F and distance settings  
• Uses Garmin weather data  
• Designed for quick, practical outdoor-training decisions