# Lactate Express vs tweena

The clearest difference is in-app purchases: tweena at none against Lactate Express's 4. tweena also leads on iOS requirement (15.0 vs 17.5). Lactate Express's advantage is update cadence (every 3 weeks vs every 5 months). 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. tweena asks for nothing beyond the download.

Lactate Express ships an update every 3 weeks, tweena every 5 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Lactate Express | tweena |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 135 MB | 2 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) | [Anton von Keussler](https://appshunter.io/developer/6774925473) |

## What reviewers say

### Lactate Express

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

This app enables performance diagnosticians and endurance athletes to conduct precise lactate step-tests. It offers scientifically recognized models for computing thresholds and generating training zones, replacing manual spreadsheet methods. The app supports automatic data capture via Bluetooth and generates professional, branded PDF reports.

**Highlights:** Precise lactate step-test capture, Multiple scientifically recognized threshold models, Automatic Bluetooth data readings, Generation of applicable training zones, Professional branded PDF reports, Comparison and tracking of tests over time, AI-powered personalized training plans

**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 |


### tweena

[App page](https://appshunter.io/ios/app/tweena/id6774925471)

**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 tweena free?

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

### Do Lactate Express or tweena have ads?

Neither Lactate Express nor tweena shows ads.

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

Lactate Express ships an update every 3 weeks, and tweena every 5 months. Most recently, Lactate Express was updated on November 3, 2026 and tweena on November 5, 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.*