REN is a personal running coach app from REN Sports BV, designed to make structured training fit around each runner’s goals, schedule, and everyday life. Its expert-backed plans adapt to performance and recovery, with real-time adjustments when availability or circumstances change. REN also offers personalized insights to help runners understand their progress and build fitness through varied, challenging workouts.

The app connects with Garmin, Apple Watch, and Suunto, and supports COROS, Samsung, and Google watches through Intervals.icu. Garmin users can sync workouts so they are ready to use without manually programming each session. The service is intended to bring elements of elite coaching together with intelligent technology, while keeping plans flexible for runners whose training days vary from week to week.

REN provides pricing information, support, and resources through its website, including a pace calculator, race time predictor, and FIT file generator. It also shares updates on Instagram and offers a podcast and partnership opportunities.