# Subintervals vs Lactate Training

The clearest difference is rating: Subintervals at 5.0 against Lactate Training's 4.0. Subintervals also leads on review sentiment (100% vs 75%). Lactate Training's advantage is monetization model (free vs free with in-app purchases). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Subintervals sells 4 one-off in-app purchases and Lactate Training sells 2 in-app purchases, starting at $9.95 per month. Whichever you choose, the download price is not the number that matters.

Subintervals holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 100% of Subintervals's written reviews are positive against 75% of Lactate Training's.

Subintervals ships an update weekly, Lactate Training every 9 days. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Subintervals | Lactate Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/subintervals/id6479748688/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/lactate-training/id6642662028/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 95 MB | 145 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Inaki Arroyo Nebreda](https://appshunter.io/developer/1736987639) | [Barney Reed](https://appshunter.io/developer/1763435265) |

## What reviewers say

### Subintervals

[App page](https://appshunter.io/ios/app/subintervals/id6479748688)

Visualize your training data with detailed displays and interactive graphs. Customize your analysis and sync seamlessly with intervals.icu for up-to-the-minute insights into activities, events, and performance metrics.

**Highlights:** Detailed activity and event visualization, Interactive performance graphs, Seamless intervals.icu sync, Customizable data analysis, Actionable training insights

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee | $3.99 | one-time |
| Lunch | $11.99 | one-time |
| Big Thanks | $17.99 | one-time |
| Sponsor | $44.99 | one-time |


### Lactate Training

[App page](https://appshunter.io/ios/app/lactate-training/id6642662028)

This intelligent training system connects your sessions, recovery, fatigue, and life stress into an AI-driven coaching platform. It helps athletes train smarter, avoid injury, and improve consistently by analyzing data and providing personalized feedback. The app offers a complete dashboard for tracking fitness, fatigue, and performance trends.

**Highlights:** AI-driven personalized coaching, Fitness vs. fatigue tracking, Daily check-ins for readiness, Smart training calendar with life event integration, Session comparison for progress analysis, Blood lactate integration for training zones

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Access (Monthly) | $9.95 | per month |
| AI Access (Yearly) | $99.99 | per year |


## Frequently asked questions

### Is Subintervals free?

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

### Is Lactate Training free?

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

### Which has better reviews, Subintervals or Lactate Training?

Subintervals is rated higher. Subintervals averages 5.0 out of 5 from 2 ratings, while Lactate Training averages 4.0 from 2 ratings.

### Do Subintervals or Lactate Training have ads?

Neither Subintervals nor Lactate Training shows ads.

### Which is updated more often, Subintervals or Lactate Training?

Subintervals ships an update weekly, and Lactate Training every 9 days. Most recently, Subintervals was updated on September 29, 2026 and Lactate Training on October 3, 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.*