A simple, distributed timer, originally designed for bouldering for competitions.

• Create timers with custom sequences
• Indication sound at one minute and a countdown at five seconds
• Show the timer on many devices
• Time is synced accurately even when the clock of the devices is out of sync
• set custom background colors
• change color or labels without restarting the timer
• start the timer at a scheduled point of time in the future
• prevent a device showing the time from going to sleep

You can use our publicly hosted instance free of charge: timer.itsblue.de

If you'd like to self-host, you can also use docker:

• 1. install docker and docker-compose on your system (follow the official guide)
• 2. create the folder /opt/distributed-timer
• 3. create the file /opt/distributed-timer/docker-compose.yml with this content:

  services:
   timer:
   image: ghcr.io/dorianim/distributed-timer:latest
   environment:
   JWT_KEY: some-random-string
   REDIS_STRING: "redis://:@redis/0"
   ports:
   - 3000:3000
   depends_on:
   - redis
   redis:
   image: docker.io/redis
   volumes:
   - ./redis-data:/data

  Make sure, to replace the JWT_KEY.

• 4. start the container: docker-compose up -d

To build a binary, you need:

• cargo >= 1.67.1
• npm >= 8.19.2

To build, run cargo build --release in the repo.

To build the docker image, simply run docker build . -t boulder-timer in the repo.