LaBLEr 1.1.0

A label printer app for Bluetooth Low Energy thermal label printers of the Marklife family (P15, P12, L13). Design labels on your phone and print them over Bluetooth LE, with no account, no cloud, and no vendor app.

Features

• Design: multi-line text, symbols and emoji, frames, imported images, and QR codes and barcodes (Code 128, EAN-13, UPC-A, Code 39, ITF) with typed QR content for links, Wi-Fi, email, phone, and contacts.
• Direct-manipulation editor: pinch to zoom and pan, drag, resize, rotate, with snapping to the center, edges, and other elements. Graphics render for the 1-bit thermal head as a clean outline (Graphic region tracing or Photo edge detection, with Smooth and Invert) or with a threshold / Floyd-Steinberg / Atkinson dithering.
• Templates and placeholders: save, favorite, search; date, time, running number, and free-text placeholders; per-label JSON export and a full library backup.
• Print history, and it reconnects to your saved printer automatically.
• 13 languages, Material 3, light and dark.

Requirements

Android 8.0 (API 26) or newer and a device with Bluetooth Low Energy. Only the P15 is verified on-device so far; the P12 and L13 use the same protocol and print head.

Install

Download and install LaBLEr-1.1.0.apk below. It is signed; your device may ask you to allow installing from this source.

License

GPLv3-or-later. With thanks to the open-source BleWebler, which made the P15 protocol accessible.