LaChart
Lactate Testing for Athletes
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
See whether the sessions you repeat are getting faster. LaChart groups them for you and shows the trend — plus a cleaner Home: today, your form, your zones.
LaChart is a professional lactate testing and athlete performance tracking app designed for coaches and endurance athletes.
LACTATE TESTING
• Conduct step tests and record blood lactate values in real time
• Connect Bluetooth heart rate monitors for live HR tracking
• Automatic lactate curve calculation with LT1 and LT2 threshold detection
• Manual threshold override for custom coaching adjustments
TRAINING ZONES
• Automatic zone calculation based on lactate thresholds
• Support for cycling (power/watts), running (pace) and swimming
• Metric and imperial unit support
ATHLETE MANAGEMENT
• Manage multiple athletes from a single coach account
• Track progress across multiple tests over time
• Compare test results and monitor fitness development
REPORTS & SHARING
• Generate professional PDF reports for each test
• Send reports directly to athletes via email
• Visual lactate curve charts included in every report
DESIGNED FOR PROFESSIONALS
LaChart is built for sports scientists, coaches and serious athletes who need accurate, data-driven insights to optimize training load and performance.
SUBSCRIPTION
LaChart Athlete and LaChart Coach are auto-renewable monthly subscriptions, each starting with a 14-day free trial. The price in your local currency is shown in the app before you confirm. Payment is charged to your Apple ID account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel it any time in your Apple ID account settings.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://lachart.net/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
changes
The developer, Jakub Stadnik, 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 Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Contact Info
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jakub Stadnik
- Size
- 99.1 MB
- Category
- Sports
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- LaChart Athlete $6.99
- Copyright
- © 2026 Jakub Stádník