Flow State Cycle App

by Keenan Robel

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Oct 26, 2026 Health & Fitness

cycle predictions data privacy period-tracking personal health wellness

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Most period apps either paywall basic features or collect a lot of very personal health data. I wanted the opposite, so I built Flow State Cycle. What it does: - One tap to log a day. It saves instantly, with no save button - Predictions come from a weighted average of your own cycles, not a hardcoded 28 days, and it shows how confident it is - CSV export + a PDF report you can bring to a doctor - Optional Apple Health sync What it doesn't do: - No account or sign-up. All data stays in local...