OpenLyfta: An open source workout data collection service for the Lyfta app

- OpenLyfta is an open-source, self-hosted server that replaces the paid subscription backend for Lyfta, an iPhone workout app focused on strength training and progressive overload tracking. - Lyfta lets users log sets, reps, and weights, and it syncs data to its cloud service — but relying on a third-party server means potential shutdown, data loss, or recurring subscription costs. - OpenLyfta gives users full control over their own workout data by running a compatible server on their own hardware (e.g., a home computer, NAS, or Raspberry Pi), with encrypted backups and no dependency on the original service. - This matters because the fitness-tech world increasingly embraces "data ownership": users want to keep using polished apps but without being locked into a company's ecosystem or paying a monthly fee just to store their own numbers.