--- title: "HRZones — App Overview" url: https://marlvel.ai/apps/hrzones category: Sports developer: Joao Frasco platforms: ios rating: 3.0 (2 ratings) pricing: paid report_level: overview generated: 2026-04-30 last_verified: "2026-04-30T15:00:37.776Z" --- > **Key Insight:** A specialized utility that provides tailored heart rate zone data through a variety of scientific calculation methods. | Metric | Value | |--------|-------| | Category | Sports | | Rating | 3.0 ★ (2) | | Pricing | paid | | Platforms | iOS | | Latest Version (iOS) | 2026.01.01 | | Developer | Joao Frasco | ## What is HRZones? HRZones is a heart rate training calculator designed to help athletes optimize workouts by generating five personalized intensity zones. The app distinguishes itself by offering multiple calculation methods, including Standard, Tanaka, Gulati, and Karvonen formulas, to accommodate diverse user profiles. ## Key Features - **Multiple Calculation Methods**: Supports Standard, Tanaka, Gulati, and custom stress-test inputs to determine maximum heart rate. - **Karvonen Formula Integration**: Enables more personalized zone calculations by incorporating the user's resting heart rate. - **Gender-Specific Recommendations**: Provides automatic formula suggestions based on user gender selection. - **Visual Zone Mapping**: Displays five color-coded training zones with icons for quick reference during workouts. ## Who is it for? Fitness enthusiasts and athletes looking to customize their training intensity based on specific physiological formulas. ## Links - [App Store](https://apps.apple.com/us/app/hrzones/id1412520667?uo=4) - [Full Intelligence Report](https://marlvel.ai/apps/hrzones) --- *This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/hrzones).* *Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*