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Open-source notices
Last updated 2026-09-22
GridTicker is built with open-source software, open data and open fonts. This page credits them and names their licenses, as those licenses require.
GridTicker's own code
The software that runs on your devices - on your LED panel, in the web app, and in the Android app and the iPhone widget - is open source: you can redistribute it and modify it under the terms of the GNU General Public License, version 3. Its complete source is published with every update, as described below. The GridTicker service those apps and panels connect to is proprietary and is not distributed.
Data and artwork
| What | Where it's used | Source and license |
|---|---|---|
| Aircraft silhouettes | The flights ticker | From tar1090, copyright Matthias Wirth and contributors, licensed under the GNU General Public License, version 2 or later. |
| Race track outlines for NASCAR | LED panels | Data © OpenStreetMap contributors, available under the Open Database License (ODbL) 1.0. Our derived outlines are offered under the same license. |
| Country outlines | The flight map | Natural Earth, public domain. |
Team, league, conference and news publisher names and logos, and the circuit maps race mode draws, belong to their owners. They aren't ours to license, and no open-source license covers them.
Software
| Software | Where it's used | License |
|---|---|---|
| React, React DOM, scheduler | The web app | MIT |
| React Router, cookie, set-cookie-parser | The web app | MIT |
| Tailwind CSS | The web app's styles | MIT |
| rpi-rgb-led-matrix | LED panels, to drive the display. Each panel's SD card carries the source of the exact version it was built with, in /usr/src/rpi-rgb-led-matrix | GNU General Public License, version 2 or later |
| Pillow | LED panels, to draw each frame | MIT-CMU (HPND) |
| Python | LED panels | Python Software Foundation License |
| Raspberry Pi OS, based on Debian | LED panels, as the operating system | Many open-source licenses; each package's license is in /usr/share/doc on the panel, and /usr/share/doc/gridticker/packages.tsv lists every package with the source version it was built from |
Fonts
The web app uses Barlow Condensed, Inter and JetBrains Mono, all under the SIL Open Font License 1.1. LED panels use GridTicker's own pixel font.
Getting the source
The complete source code of GridTicker's own software - the LED panel's software, the web app, the Android app and the iPhone widget script - is published with every update at https://app.gridticker.com/downloads/gridticker-source.tar.gz. The panel's own software is also on its SD card in readable form.
For the rest of the software on an LED panel that's licensed under the GNU General Public License or the GNU Lesser General Public License - Raspberry Pi OS and the LED driver - this is our written offer. For at least three years after we last ship a panel model, and for as long as we offer support or spare parts for it, we'll give anyone who asks a complete, machine-readable copy of the corresponding source code: as a download at no charge, or on a physical medium for no more than it costs us to make and send it. Write to support@gridticker.com and tell us the version in ticker-version.txt on the panel's SD card.