Ewoc is a free public-source indoor cycling app for Android. It helps you ride an FTMS-compatible smart trainer with structured workouts, live ride telemetry, Bluetooth heart-rate sensor support, local workout files, and post-session summaries. You can ride bundled workouts, import workouts from ZWO, legacy XML, or Ewoc EWO files, use the built-in Android workout editor, or ride without a structured workout in telemetry-only mode. Ewoc is local-first. It does not include paid feature gates, Google Play Billing, AI workout generation, support-bundle uploads, Health Connect data reads, advertising, analytics, or a backend account. Trainer-sensitive behavior still depends on the trainer model and firmware. For best results, use an FTMS-compatible smart trainer or exercise bike and keep other trainer-control apps disconnected while riding.