# Lactate Express vs SpiroFit

The clearest difference is in-app purchases: SpiroFit at none against Lactate Express's 4. On price, update cadence, 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. SpiroFit asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on August 16, 2026 and August 25, 2026 respectively.

## The numbers

| Metric | Lactate Express | SpiroFit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/spirofit/id6475291331/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free |
| Size | 133 MB | 8 MB |
| Requires iOS | **17.5** | 17.6 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [COPAtec GmbH](https://appshunter.io/developer/890381257) | [SENDSOR GmbH](https://appshunter.io/developer/1723823291) |

## What reviewers say

### Lactate Express

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

**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 |


### SpiroFit

[App page](https://appshunter.io/ios/app/spirofit/id6475291331)

Track key respiratory and heart metrics live during workouts like running or cycling. Analyze professional data for optimal training intensity. Suitable for coaches, professional athletes, and fitness enthusiasts.

**Highlights:** Live respiratory rate tracking, Live heart rate monitoring, Tidal volume measurement, O2 consumption tracking, CO2 output tracking, Professional data analysis, Real-time training feedback

**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 SpiroFit free?

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

### Do Lactate Express or SpiroFit have ads?

Neither Lactate Express nor SpiroFit shows ads.

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

Lactate Express ships an update every 3 weeks, and SpiroFit every 3 weeks. Most recently, Lactate Express was updated on August 16, 2026 and SpiroFit on August 25, 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.*