# LaChart — Lactate Testing for Athletes

> Lactate Testing for Athletes (iPhone/iPad app by Jakub Stadnik.)

- Source: https://appshunter.io/ios/app/lachart/id6764768876 (this page in markdown: same URL + `.md`)
- Developer: [Jakub Stadnik](https://appshunter.io/developer/1895908891)
- Category: Sports, Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 223 MB
- Languages: American English
- Released: 2026-05-21
- Data updated: 2026-08-26
- User reviews in markdown: https://appshunter.io/ios/app/lachart/id6764768876/reviews.md

## What is LaChart?

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.


## Version history (last 5 releases)

### 1.0.8 — 2026-08-20

• In-app guide — the lightbulb in the header opens everything LaChart can do, with search and a question form
• Power / Pace radar on the Trainings page — follows the sport filter; monthly comparison is now a month range
• Opening a session from the list shows the full Strava or Garmin activity with its laps; closing returns to the list
• No more cross-account notifications — signing in as a different athlete stops the previous one's alerts
• Fixes to the weekly summary, calendar and planner

### 1.0.7 — 2026-08-06

small changes

### 1.0.6 — 2026-07-22

• Apple Health recovery — sleep, resting/overnight HR and HRV on your dashboard and calendar, with trends and sleep stages.
• Better Compare: lap or time view, effort-shaded bars, smarter interval detection.
• Auto-named interval workouts (e.g. "5×8min") and no more Strava/Garmin duplicates.

### 1.0.5 — 2026-07-11

fixing small bugs

### 1.0.4 — 2026-06-30

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

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*