ID Watermark のアプリ分析 9月6日

Add visible and invisible watermarks to any photo — protect your images from misuse and prove where they came from. ID Watermark runs 100% on your device, fully offline. Whether you're sharing ID documents, certificates, screenshots, or creative work, ID Watermark helps you deter unauthorized use and trace a photo's origin. Embed a visible text overlay, an invisible digital watermark (DCT/SVD-based), or both — then verify any photo in seconds. KEY FEATURES - Invisible Digital Watermark Embed a hidden, password-protected identifier into your photo's pixels. Invisible to the eye, but extractable in the app to verify authenticity and trace the source. - Visible Watermark Add tiled or custom single-text watermarks (position, rotation, font, color, opacity) to mark ownership clearly. - Batch Mode Generate separately watermarked images for multiple recipients at once — ideal for distributing certificates or documents. - Photo Verification Re-import any watermarked photo to check whether it has been tampered with and read its embedded info. - 100% On-Device & Offline All processing happens locally. No servers, no account, no cloud upload. Your photos never leave your device. - Privacy First No data collection. No ads. No tracking. Your images stay on your iPhone. PERFECT FOR - Protecting ID photos, certificates, and permits - Marking ownership on creative and stock images - Adding "For Verification Only" stamps to documents - Preventing screenshot and photo misuse - Photographers, designers, educators, and businesses How it works: 1) Pick a photo. 2) Set your watermark text and password. 3) Generate. 4) Save or share. To verify, re-open the image in the app. Disclaimer: Watermarks are an anti-counterfeit and traceability aid, not a substitute for legal certification. You are responsible for the photos you process.