# 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%). 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 9 in-app purchases, starting at $4.99 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 8 days. The most recent releases landed on November 4, 2026 and November 12, 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-ai-coach/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 8 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 109 MB | 170 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **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-ai-coach/id6642662028)

An AI-powered coach for runners, cyclists, and triathletes that adapts training plans based on user feedback and existing watch data. Get personalized session recommendations, understand workout intensity, and adjust your schedule around life events.

**Highlights:** AI-driven personalized training plans, Voice and text-based coaching interaction, Integration with Garmin and Strava data, Adaptive scheduling for real-life events, Progress tracking dashboard, Session comparison and analysis

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic | $4.99 | per month |
| Full Access (Monthly) | $9.49 | per month |
| AI Access (Monthly) | $9.95 | per month |
| Full Access + Coach (Monthly) | $14.99 | per month |
| Pro 6 Months | $49.99 | per 6 months |
| Full Access (Yearly) | $99.99 | per year |
| AI Access (Yearly) | $99.99 | per year |
| Max 6 Months | $119.99 | per 6 months |
| Full + Coach (Yearly) | $229.99 | 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 8 days. Most recently, Subintervals was updated on November 4, 2026 and Lactate Training on November 12, 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.*