CHASKi.fit vs LaChart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CHASKi.fit
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Elevate your training with the CHASKi app, the perfect companion for athletes and fitness enthusiasts seeking to optimize performance. Packed with cutting-edge features, this version brings a revamped Ramp Test system, offering programmed protocols and enhanced data capture for simpler testing. The update lets you rename your CHASKi, track different sport types, and see metrics such as VTs and VO2max directly from your mobile app. Stay ahead of your goals with frequent updates that will continuously introduce new features and refine your user experience. CHASKi is your trusted partner in breathing better, training smarter, and pushing limits. Download now and redefine the way you optimize your fitness!
LaChart
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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
Screenshots
Verdict
The clearest difference is in-app purchases: CHASKi.fit at none against LaChart's 1. LaChart's advantage is update cadence (every 10 days vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. LaChart sells 1 in-app purchase, starting at $6.99 per month. CHASKi.fit asks for nothing beyond the download.
CHASKi.fit ships an update every 6 weeks, LaChart every 10 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.
| Parameter | CHASKi.fit | LaChart |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 28 MB | 95 MB |
| Age rating | 4+ | 4+ |
| Developer | IC Innovations | Jakub Stadnik |
In-app purchases
CHASKi.fit
No in-app purchases
LaChart
- LaChart Athlete14 Days trial$6.991 Month
