# Lactate Express vs LaChart

The clearest difference is in-app purchases: LaChart at none against Lactate Express's 4. LaChart also leads on update cadence (every 9 days vs every 3 weeks) and iOS requirement (15.0 vs 17.5). On price, ads and device support there is nothing between them.

Both are free to download. Lactate Express sells 4 in-app purchases, starting at $24.99 per month. LaChart asks for nothing beyond the download.

Lactate Express ships an update every 3 weeks, LaChart every 9 days. The most recent releases landed on October 12, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Lactate Express | LaChart |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Subscription | — |
| Size | 133 MB | 226 MB |
| Requires iOS | 17.5 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [COPAtec GmbH](https://appshunter.io/developer/890381257) | [Jakub Stadnik](https://appshunter.io/developer/1895908891) |

## What reviewers say

### Lactate Express

[App page](https://appshunter.io/ios/app/lactate-express/id1671640113)

This app provides precise lactate step-test data capture and analysis for endurance athletes and performance diagnosticians. It computes thresholds using scientifically recognized models and generates clear training zones, eliminating the need for manual spreadsheets. Professional reports can be generated and shared easily.

**Highlights:** Lactate step-test data capture, Bluetooth sensor integration, Multiple threshold analysis models, Automatic training zone calculation, Branded PDF report generation, Test comparison and trend tracking, Athlete roster management

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Teams (Monthly) | $24.99 | per month |
| Professionals (1 Month) | $44.99 | per month |
| Teams (Yearly) | $250.00 | per year |
| Professionals (Yearly) | $399.00 | per year |


### LaChart

[App page](https://appshunter.io/ios/app/lachart/id6764768876)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Lactate Express free?

Lactate Express is free to download, with in-app purchases available.

### Is LaChart free?

LaChart is free to download, with no in-app purchases.

### Do Lactate Express or LaChart have ads?

Neither Lactate Express nor LaChart shows ads.

### Which is updated more often, Lactate Express or LaChart?

Lactate Express ships an update every 3 weeks, and LaChart every 9 days. Most recently, Lactate Express was updated on October 12, 2026 and LaChart on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*