Peri

Open-source period tracker app.

Mobile appfreeglobal

An open-source mobile app, Peri lets people log and predict their menstrual cycle and is available free. It provides a privacy-focused alternative to commercial period trackers that often collect and monetize sensitive health information.

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Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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