Show HN: I spent 2 years building an iOS app no one asked for
i built a heart rate zone training app for runners.
ios + apple watch. custom zones, real-time haptics, post-run graphs.
all the “smart” stuff you’d expect.
but i never talked to a single runner before building it. not even myself lol. started as a thesis → kept building → added features → added a paywall (€4/month!) → launched it → and yeah… no one cared.
zero feedback. zero users. just code in the void.
i recently made the whole thing free. not trying to “sell” anything now — just seeing if it’s actually useful, and listening this time. curious how others handle this. ever build something 100% wrong?
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I'm curious; I think you should explain it in a simple line.