Build a consumer-owned workout record that imports activities from major health repositories, accepts manual or photo-based entries, and lets users map completed sessions to a training program. Maintain an append-only history with visible corrections, backups, and portable exports so accidental deletion or account confusion does not destroy progress. Start as a focused software product rather than reproducing workout videos, coaching, or social fitness features.

Fitness activity is increasingly split among workout apps, smartwatches, gyms, and health repositories, while the reviews show persistent gaps in history retention and metric transfer. Existing platform health stores provide enough common data to build a narrow continuity layer before pursuing direct integrations with individual training apps.