Yes, I am seriously launching a workout app in 2026. Most interval timers do one format and put the rest behind a subscription. Pacelab mixes Tabata, AMRAP, EMOM, Circuit, Rounds and Timed in one session, free, nothing paywalled. The AI part is the actual difference. Connect Claude via MCP or ChatGPT via plugin and it writes workouts into your library, edits them, schedules them. iOS and Android.