A clean, minimal pattern-lock screen for fast, secure authentication. Users draw a gesture across a dot grid with smooth line animation, clear success/error feedback, and an optional “Forgot your pincode?” action. Perfect for app locks, sensitive screens, and privacy-first flows.

Functionality

• 3×3 grid (configurable to 4×4/5×5) with smooth path drawing

• Gradient stroke, node rings, and animated active/visited states

• Create / confirm / verify / change pattern flows

• Rules: min/max length, disallow repeats/overlaps (configurable)

• Error feedback: shake, color change, haptics, and cooldown/lockout

• Stealth mode (hide trail or show dots only)

• “Forgot your pincode?” link with custom callback

• Optional biometric fallback (Face/Touch ID)

• Secure hooks to hash + store pattern via device secure storage

• Localization-ready labels (e.g., “Enter current graphic lock”)

• Theming: colors, line width, node size, spacing, shadows

• Accessibility: large hit targets, screen reader labels

• Works offline; mobile & web responsive

• Callbacks: onStart, onChange, onComplete, onError, onForgot

Use cases

• App-level lock or re-auth on resume

• Protecting settings, billing, or wallet screens

• Private galleries, notes, and document vaults

• One-tap parental/guest/kiosk mode unlock

• Quick confirmation before purchases or payouts

• Team apps requiring lightweight step-up auth

• Onboarding flows offering pattern vs. PIN choice

• Enterprise/internal tools with privacy gates

Keywords
pattern lock, gesture lock, grid lock, Android pattern, 3×3 lock, 4×4 grid, 5×5 grid, gesture authentication, app lock, privacy screen, secure storage, hash pattern, SHA-256, biometric fallback, Face ID, Touch ID, cooldown, lockout, haptic feedback, shake animation, error state, success state, stealth mode, gradient line, node ring, localization, multi-language, theming, Flutter widget, FlutterFlow component, mobile security UI, pincode fallback, forgot pincode, verification flow, responsive layout, offline support, callbacks, secure auth.