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What Is a Fitness App and What Should It Track?

Modern fitness apps explained — GPS, nutrition, progress and more. What they can do and what to look for.

By the Trakon Team · Updated August 2025

What is a fitness app?

A fitness app is a mobile application that helps you track, plan and analyze your physical activity and nutrition. Modern fitness apps go far beyond simple step counters — they use your phone's GPS, sensors and even AI to give you detailed insights about your workouts, diet and progress over time.

Trakon is a complete fitness app — GPS tracking, AI food scanning, progress charts and community clubs.

Download on the App Store Get it on Google Play

What a modern fitness app can track

GPS activities

Walking, running and cycling routes — distance, pace, elevation, route maps and calories burned. This is the core feature for most fitness apps.

Nutrition and calories

Some apps (like Trakon) include food tracking with AI food scanning — point your camera at a meal and get calorie and macro estimates instantly. This is a game-changer for weight loss.

Heart rate

With a compatible wearable or phone sensor, fitness apps can track heart rate during workouts and at rest.

Steps and daily activity

Most phones have built-in step counters. A good fitness app aggregates this data into daily and weekly summaries.

Sleep

Some apps integrate with sleep tracking to show how recovery affects your performance.

Progress and trends

Charts showing distance, pace, calories, weight and workout frequency over time — so you can see real progress.

Track activities and nutrition in one app.
Trakon combines GPS activity tracking with AI food scanning — no separate apps needed.

Download on the App Store Get it on Google Play

Fitness app vs fitness tracker (hardware)

A fitness app is software on your phone. A fitness tracker is a physical device (like a smartwatch or band). Many people use both — the tracker collects data and the app displays it. But modern fitness apps like Trakon can work with just your phone's built-in sensors — no wearable required.

Why use a fitness app?

Read next: What Should You Look for in a Fitness Tracking App?

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