# Lactate Express vs strokebook

The clearest difference is in-app purchases: strokebook at none against Lactate Express's 4. strokebook also leads on update cadence (every 6 days vs every 3 weeks). Lactate Express's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

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

Lactate Express ships an update every 3 weeks, strokebook every 6 days. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Lactate Express | strokebook |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Monetization | Subscription | — |
| Size | 135 MB | 53 MB |
| Requires iOS | 17.5 | **16.4** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [COPAtec GmbH](https://appshunter.io/developer/890381257) | [espressino GmbH](https://appshunter.io/developer/6814382260) |

## 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 |


### strokebook

[App page](https://appshunter.io/ios/app/strokebook/id6814382258)

**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 strokebook free?

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

### Do Lactate Express or strokebook have ads?

Neither Lactate Express nor strokebook shows ads.

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

Lactate Express ships an update every 3 weeks, and strokebook every 6 days. Most recently, Lactate Express was updated on October 24, 2026 and strokebook on October 29, 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.*