CTS ActivityLab
GPX, TCX, FIT File Analyzer
Free · In‑App Purchases
Go beyond basic stats with advanced analysis for GPX, FIT, and TCX files from Garmin, COROS, Apple Watch, Suunto, Polar, Amazfit, and more.
ActivityLab is designed for athletes who want to understand their fitness data beyond the basic metrics shown by their watch and to compare multiple devices side by side.
Import GPX, FIT, and TCX files from Garmin, COROS, Apple Watch, Suunto, Polar, Amazfit, Wahoo, and many other devices to explore detailed performance data.
With ActivityLab you can:
• Compare multiple activities side-by-side
• Import activities directly from Apple Health (IOS Only)
• Analyze GPS accuracy and track quality
• Inspect elevation and altitude data
• Review heart rate, pace, cadence, power, battery usage, and other sensor metrics
• Visualize routes and activity statistics with powerful charts
• Discover insights that aren't available in your watch's companion app
• Compare device accuracy side-by-side with ActivityLabs custom agreement algorithm
• Save and Sync comparisons across multiple devices (iPhone, iPad, and Mac!)
Whether you're testing new GPS watches, training for your next race, or simply curious about your data, ActivityLab gives you professional-grade analysis tools in an easy-to-use interface.
CTS ActivityLab is free for importing, viewing, analyzing, and sharing one activity at a time. An optional ActivityLab Pro auto-renewing subscription is required to compare multiple activities, view agreement statistics, and save or sync comparisons with iCloud. Eligible new subscribers receive a 7-day free trial, followed by the localized monthly App Store price.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
-Fixed an error that would result in misaligned charts with certain devices
-Added ability to hide/show devices from charts and map
-optimized and improved stability and performance
The developer, CTS Media Group LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- CTS Media Group LLC
- Size
- 9.9 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 26.5 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 6 more
- English, French, German, Italian, Japanese, Portuguese, Spanish
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- CTS ActiveLab Monthly $1.99
- Copyright
- © Chase the Summit