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

Re:Show HN: Heart Rate Zones Plus – The first iOS app I ever... by tobias5 on Tuesday April 29, 2025 @05:52AM (#43830504)

Hey thanks for the feedback. The secret? I'm not sure? You had issues with the speed or getting the data and updating the view?

What I did is adding a loading indicator and fetching data onChange, so if I change e.g. bow heart rates are calculated it starts to fetch instantly after the change not only on the view with the bars.

And I'm currently just fetching 30 days. I think this will be interesting if I try to extend it.

Onboarding flow, Home screen widget is on my list. Thanks.

The filtering would also be interesting. Haven't though about hat because I usually myself do always the same workouts

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Re:Show HN: Heart Rate Zones Plus – The first iOS app I ever... by ellisv on Tuesday April 29, 2025 @08:20AM (#43831608)

My speed issue was in getting the data (although I think it is fixed now).

The other big performance problem I've had is the simulator hanging when I try to use Swift Charts.

My primary interest was in monitoring my total zone 2 time for cardio workouts where I spend at least 30 consecutive minutes in zone 2. However I've reduced the scope for now while I get the minimum viable app up and running.

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