I want to launch a straightforward boxing-focused workout app that guides users through complete sessions and lets them follow along with high-quality, instructor-led videos. Every workout should combine three pillars—cardio drills, strength-training moves, and flexibility work—so the user gets a balanced routine in one place. Here’s what I have in mind: an intuitive interface where someone can open the app, choose the day’s session, and watch the coach demonstrate each round on screen. Timers, rest prompts, and clear exercise names should sync with the video so there’s no guesswork. I’m happy for you to suggest the tech stack, but the end result needs to run smoothly on modern smartphones and be easy to update with fresh videos later on. There’s no hard deadline on delivery, so we can set realistic milestones and make sure the build, UI polish, and testing are all done properly. Once the core release is stable, I’d like simple options to expand the library and add new class packs without rewriting the whole app. If you’ve built fitness or boxing apps before—or have solid experience integrating video libraries and workout timers—let’s talk through your approach and outline the best path to launch.