Should I build my own exercise database or use an API?
Use an API unless your exercise catalog is itself the product. Building one means writing instructions, sourcing and hosting media, tagging taxonomy, and maintaining it indefinitely — months of work that is not your differentiator. WorkoutDB gives you ~873 exercises with media, search, and localization immediately.
The real cost of building
A credible exercise database is hundreds of movements, each with accurate instructions, consistent demonstration media, and correct muscle/equipment/difficulty tagging. Then you host the media on a CDN, build search, and keep everything current. For most apps, this is undifferentiated heavy lifting that delays launch.
When buying wins
- You want to launch in weeks, not quarters.
- Your differentiator is coaching, programming, UX, or community — not the raw catalog.
- You need media and multiple languages without filming or translating anything.
When building might make sense
If a proprietary, hand-curated catalog is your core moat (e.g. a unique training methodology with exclusive footage), building can be justified. Even then, many teams start on an API to validate, then invest later. WorkoutDB lets you start free with 5,000 requests/month with no credit card required.
Related questions
- How long does building an exercise database take?
- Realistically months: sourcing instructions, filming or licensing media, hosting it, tagging taxonomy, and building search — before any maintenance. An API removes nearly all of that.
- Can I migrate off an API later?
- Yes. Reference exercises by stable slugs/ids in your own data model, and you can swap the content source later without rewriting your app.
Build it on WorkoutDB
~873 exercises with demo video, ranked search, and four languages — over a clean REST API. Start free: 5,000 requests/month, no credit card.