ClientAPT

ClientAPT is an encrypted, on-device appointment and client manager for service professionals — tattoo artists, stylists, massage therapists, and anyone who needs to keep client work secure.

The whole app runs offline. There is no account to create, no server to sign in to, no analytics, no cloud sync. Everything you enter — clients, appointments, services, photos — stays on your phone in an encrypted vault. We can't see it. No one can, unless they have your PIN and your phone.

Features:
• Today / Week / Compendium views over your schedule.
• Per-client notes and photos.
• Tier-based clients with optional "sensitive" flag and a separate sensitive PIN for higher-value records.
• Services catalog with add-ons and palettes.
• Recurring appointments with time-only reminders.

Security:
• No network access. The app does not declare the INTERNET permission — it cannot make outbound connections.
• SQLCipher AES-256 database, key derived from your PIN via Argon2id.
• Notifications only show "Appointment at HH:MM" — never the client's name, service, or address.
• Photos captured in-app via CameraX, never written to the Android MediaStore. Recents screenshot masked with FLAG_SECURE.
• Biometric unlock is a convenience layer on top of the PIN and never substitutes for the sensitive PIN.

ClientAPT mirrors the iOS version feature-for-feature.