---
title: "HIIT 4x4 Lite — App Overview"
url: https://marlvel.ai/apps/hiit-4x4-lite
category: Health & Fitness
developer: Eastridge Technology
platforms: ios
rating: 5.0 (2 ratings)
pricing: free
report_level: overview
generated: 2026-05-04
last_verified: "2026-05-04T09:05:55.902Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** The app functions as a specialized interval timer and heart rate monitor tailored specifically for the 4x4 HIIT training methodology.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Health & Fitness |
| Rating | 5.0 ★ (2) |
| Pricing | free |
| Platforms | iOS |
| Latest Version (iOS) | 1.08 |
| Developer | Eastridge Technology |

<!-- SECTION: Summary -->
## What is HIIT 4x4 Lite?

HIIT 4x4 Lite is an Apple Watch application designed to guide users through a specific 4x4 High Intensity Interval Training protocol. The app monitors heart rate against a calculated Maximum Heart Rate (MHR) to manage intensity levels during warmup and interval phases.

<!-- SECTION: Key Features -->
## Key Features

- **4x4 Interval Protocol**: Provides a structured workout consisting of a 10-minute warmup followed by four cycles of 4-minute high-intensity and 3-minute low-intensity intervals.
- **MHR-Based Intensity Tracking**: Calculates target intensity zones as a percentage of the user's Maximum Heart Rate.
- **Visual Speedometer Dial**: Displays real-time heart rate data on a speedometer-style interface to indicate if the user is within the target intensity zone.
- **Audio Feedback**: Issues warning chimes when the user's heart rate deviates from the prescribed interval target range.

<!-- SECTION: Target Audience -->
## Who is it for?

Fitness enthusiasts using Apple Watch who follow structured HIIT training regimens.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/hiit-4x4-lite/id1558498996?uo=4)
- [Full Intelligence Report](https://marlvel.ai/apps/hiit-4x4-lite)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/hiit-4x4-lite).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*