Zone 2 AI: Vo2 Max & Endurance

Name: Zone 2 AI: Vo2 Max & Endurance
Rating: 4.4 (92 reviews)
Author: Unbounded Technologies LLC

By: Unbounded Technologies LLC App

Heart Rate Zones Training

Overview

Version:

2.3.9

Last updated: 2026-07-17

Ranking

#159,403 ▲ 977

Overall

Features & Capabilities

Zone 2 AI is a precision training app that validates true Zone 2 sessions by filtering Apple Health data, and combines steady-state cardio with Norwegian 4x4 sprints to drive VO2 max and endurance. It provides RPE feedback, a Zone2AI Power Score, incline calibration, a weekly dose, and privacy-first, on-device insights for a personalized longevity-focused plan.

Designed for beginners to high performers, Zone 2 AI supports Apple Watch, Polar, Garmin, Strava, and more via Apple Health, with no ads and no data selling. It is built to optimize metabolic health and biological aging while protecting user privacy.

User Growth & Download Statistics

App Sports AI Analytics

By:

Unbounded Technologies LLC

Rating:

4.40

(92) 3 new ratings

Version:

2.3.9 Last updated: 2026-07-17

Version code:

888432564

Creation date:

2025-03-16

Compatible devices:

Size:

82.53MB

URLs:

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-07-21

Compare stats and ranking:

Ranking

# 159,403 ▲ 977

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Unbounded Technologies LLC

Apple Apps Store

https://apps.apple.com/us/app/zone-2-ai-vo2-max-endurance/id6742467259

User Reviews

Takes the guess work out.

by go*****, 2026-07-03

I have been saying to start targeting my heart health more. I life 5 days a week and I am I great fiscal shape but I know I need to working more on my heart health. I have been hearing about Zone 2 triangle for some time and want to integrate that into my training program I found the app last night and it seems to be perfect I downloaded it, set it up on my iPhone but it’s not on the Apple Watch.. now I know my series 3 is a bit old but I would assume it would work… I tied to get help using the AI tool in the app and it does not work for helping with the app.. I searched in line and there’s little to now help. I did find a posthaste app will not work on a series 3.. It seems to be more effort than it’s worth.. apps do not need to be this complicated.. it should be like any other app.. download set up then use.. I purchased the lifetime subscription for something it seems will not work.