Show HN: Heart Rate Zones Plus – The first iOS app I ever developed

Summary

Track time in heart rate zones. Track per day, week, month and more. Set goals & visualize progress. Get details about heart rates zones of your workouts.Track your time in heart rate zones and reach your fitness goalsTake your fitness tracking to the next level with Heart Rate Zones Plus - designed for people who want to understand their heart rate zone performance, not just count steps or calories. Whether you're a dedicated athlete, a weekend warrior, or just starting your fitness journey, this app helps you monitor your heart rate zones, set meaningful goals, and visualize your progress in ways that matter.Key features1. Custom time periods Understand your overall time per day, week, month, last 7 days or last 30 days in each heart rate zone. 2. Workout to zone attributionEver wondered which workouts actually contributed to time in Zone 4 or Zone 5? With the smart breakdowns, you don’t just see your total time in heart rate zones—you see exactly which workouts fueled those stats. This lets you answer questions like:- Does swimming really push me into higher zones?- How much time have I spend in Zone 2 this week?Visualize the impact of each session in intuitive progress bars, color-coded by zone.You can also use the simplified aggregates moderate exercise (Zone 1-3) and vigorous exercise (Zone 4-5).3. Multiple zone calculation methodsNot all hearts are the same, and neither are their training zones. Choose from a variety of scientifically-backed methods to calculate your maximum heart rate like:- 220 – age- 208 – 0.7 × ageGender-specific formulas, such as:- 216 – 1.09 × age (bio. female)- 202 – 0.55 × age (bio. male)Decide if you want to include resting heart rate into the zone calculation. You can also manually override your max heart rate and resting heart rate, giving you the power to personalize your training.4. Set personal time goals for any zoneMotivation thrives with targets. With customizable goals, you can decide how many minutes you'd like to spend in ...