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Preview 2 platforms
iPhone 9 images
iPad 3 images
What’s New Version 1.0.5
fixing small bugs
Description
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.
Accessibility
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Version history 7 versions
Build 887994009v1.0.52026-07-11 18:17:54
fixing small bugs
Build 887608895v1.0.42026-06-30 21:11:41
Fitness & Form aligned with calendar TSS — more accurate training load
• Pull-to-refresh on the dashboard
• Per-sport TSS preference (power / HR / pace) in Settings
• Workout editor improvements and bug fixes
Build 887408318v1.0.32026-06-25 06:46:33
• Lab test thresholds aligned with training zones on Profile
• Performance Insights on Home
• Edit activities & per-workout TSS on Calendar
• Strava full-history import goes further back
• Bug fixes & stability
Build 887057288v1.0.212026-06-21 04:47:42
What's new in LaChart:
• Apple Health integration — sync resting heart rate, HRV, and sleep data
• Improved training calendar on mobile with smoother day switching
• Form & Fitness chart improvements and help guide
• Better lactate logging for Strava-imported activities
• Performance improvements and bug fixes
Build 886514942v1.0.22026-06-07 21:08:17
Smoother, faster and more connected.
• Connected lactate testing: control your smart trainer in ERG mode with smoother, more stable power at higher watts
• Smart sensor memory: your trainer, heart rate strap and CORE temp sensor now reconnect automatically
• Structured workouts now save everything — power, cadence, heart rate, core temperature, laps and lactate — as one analyzable session
• Redesigned lactate progression: switch sports, tap any point for details, and jump straight into the session
• Cleaner, faster mobile dashboard with a swipeable weekly summary
• Improved workout builder and calendar on iPhone and iPad
• Everything is free while we're in early access
Thanks for training with LaChart. Questions or feedback? We'd love to hear from you.
Build 886012579v1.0.12026-05-28 17:31:44
• Build and run structured workouts straight from the calendar
• Tag any interval with a blood lactate sample
• Auto-categorize activities by zones, intervals and titles
• Various performance improvements and bug fixes
Build 885108863v1.02026-05-21 19:54:00
No pricing data captured yet — comparisons appear once the app has paid storefronts or in-app purchases.
Availability 1 of 1 storefronts
| Region | Language | Price | Ratings | Avg | Version |
|---|---|---|---|---|---|
| US | en-US | Free | 0 | — | 1.0.5 |
Change log 11 changes · US
✎
releaseNotes updated
fixing small bugs
✎
description updated
LaChart is a professional lactate testing and athlete performance tracking app designed for coaches and endurance athletes.
LACTATE TESTING
• Conduct step test
✎
subtitle updated
Lactate Testing for Athletes
✎
name updated
LaChart
◆
Version 1.0.5 released
fixing small bugs
◆
Version 1.0.4 released
Fitness & Form aligned with calendar TSS — more accurate training load
• Pull-to-refresh on the dashboard
• Per-sport TSS preference (power / HR / pace) in Settings
• Workout editor improvements and bug fixes
◆
Version 1.0.3 released
• Lab test thresholds aligned with training zones on Profile
• Performance Insights on Home
• Edit activities & per-workout TSS on Calendar
• Strava full-history import goes further back
• Bug fixes & stability
◆
Version 1.0.21 released
What's new in LaChart:
• Apple Health integration — sync resting heart rate, HRV, and sleep data
• Improved training calendar on mobile with smoother day switching
• Form & Fitness chart improvements and help guide
• Better lactate logging
◆
Version 1.0.2 released
Smoother, faster and more connected.
• Connected lactate testing: control your smart trainer in ERG mode with smoother, more stable power at higher watts
• Smart sensor memory: your trainer, heart rate strap and CORE temp sensor now reconn
◆
Version 1.0.1 released
• Build and run structured workouts straight from the calendar
• Tag any interval with a blood lactate sample
• Auto-categorize activities by zones, intervals and titles
• Various performance improvements and bug fixes
◆
Version 1.0 released