HEIC (High-Efficiency Image Container) is Apple's proprietary photo format on iPhones and iPads. Converting HEIC to PDF translates Apple HEIF containers into universally readable documents that open on Windows, Linux, Android, and Mac. The engine preserves wide color gamuts (P3 color space) and high resolution, assembling multiple iPhone receipts or photos into a unified document. Crucial for iPhone users submitting official documents, insurance claim photos, and receipts to corporate portals.