e vs TapInk

e-chain helps you design and write artwork to supported NFC-powered e-paper keychain displays. Choose your Waveshare 1.54-inch panel, add a photo or text, tune brightness, contrast, saturation, exposure, sharpness, dithering, and panel colors, then send the finished image by holding your iPhone near the NFC tag. Features: - Supports Waveshare 1.54-inch NFC-powered e-paper B and G panels - Photo import with live e-paper preview - Text overlays with repeat and spacing controls - Three-color and four-color panel palettes - Dithering and direct color modes - Local saved drafts and recent images - NFC write progress with clear status updates

TapInk turns your iPhone into a simple writer for Waveshare NFC-powered e-paper displays. Design crisp black-and-white labels, choose icons or QR codes, add styled text and borders, save reusable layouts, or send photos with dithering. When you’re ready, hold your iPhone near the display and TapInk transfers the image over NFC. Features: - Create custom e-paper labels - Add icons, photos, QR codes, text, and borders - Save and reuse label designs - Preview black-and-white output before sending - Choose plain or dithered rendering - Supports multiple Waveshare NFC e-paper display sizes - Clear transfer progress while writing over NFC TapInk is built for NFC-powered e-paper displays that draw power from your iPhone during transfer. No battery on the display side required.