Most period trackers sell your data. Velle doesn't. We are an offline-first, zero-knowledge cycle tracker built for ultimate privacy. No accounts, no cloud, no ads. Key features: 🔒 Local Encryption: Data stays on your device 🛑 Burner PIN: Instantly wipe all records 🥷 Stealth Mode: Disguise icon as a calculator or notepad 📊 Export raw CSVs or clinician-ready PDFs For your eyes only - inaccessible to tech companies, us, or anyone holding your phone. Your cycle. Your control.