Stackly: AI Scanner & PDF Sign

Stackly is your all-in-one AI-powered document scanner and PDF toolkit. Effortlessly scan paper documents, receipts, IDs, and notes into clean, high-resolution PDFs with automatic edge detection, perspective correction, digital signature, PDF compression, and merging capabilities. ✨ KEY FEATURES: 📷 AI Smart Edge Detection • Automatic real-time corner & document boundary detection. • Precise perspective cropping for shadow-free, flat scans. • Multi-page batch scanning mode for scanning entire books and contracts. ✍️ Digital Signature on PDF • Draw and place your personal signature anywhere on your pages. • Choose from multiple pen colors (Black, Blue, Red). • Resizable and draggable signature overlay. ⚡ Smart PDF Compression • Reduce PDF file sizes by up to 75% without sacrificing text readability. • Presets: High Quality (100%), Balanced (50% smaller), and Small Size (75% smaller). 📑 PDF Merger • Combine multiple scanned documents and external PDF files into a single organized PDF. • Easy drag-and-drop page reordering. 🎨 Advanced Enhancement Filters • Magic Color: Enhances text clarity and vibrance. • Black & White: Perfect for forms, receipts, and invoices. • Grayscale: Clean tonal reproduction. • Rotate and manual perspective fine-tuning. 🔒 100% Private & Offline • All document processing, edge detection, and PDF generation happen directly on your device. • No account required, no sign-in, and zero data leaves your phone. 📁 Organization & Sharing • Organize scans into custom folders. • Search documents instantly. • Export, print, and share PDFs via WhatsApp, Gmail, Drive, and more. Developed with ❤️ by Stackly Support: stackly.developer@gmail.com