Health, home and travel decision
Builtdifferent (Investor)
A capable developer can reproduce the core app (questionnaire, plans, chat, tracking) in a multi-week build, but most of the paid product's durable value comes from its vetted coaches, large user base, and curated content which are costly or impossible to replicate quickly.
Visit website↗Built by Alex Birle, who ships 4 products in this index
Not priced
No pricing page we fetched carried a figure, so there is nothing to compare against. The build side is still real.
$100one-off44 h to build
$130/mo6 h/mo upkeep
No published price to break even against.
Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need - the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship. All Builtdifferent (Investor) alternatives, with the arithmetic →
What a replacement has to do
- User completes onboarding questionnaire → coach/nutritionist creates plan → user follows plan and logs workouts/meals → user chats with coach for adjustments → coach updates plan periodically.
What it still won’t have
- Access to a vetted network of certified coaches and nutritionists
- Brand trust, large user base, and aggregated reviews
- Polished mobile app UX and attention to product-market fit
- A curated food database with 1000+ alternatives
- Existing customer support and operations for coach management
What remains hard
- Brand trust
First-year cost
No published price
Builtdifferent (Investor) does not publish a price we could read, so there is nothing to compare against. What building costs is below.
Money you would actually spend
Time you would spend
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What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal personalized fitness+nutrition coaching web app using Next.js (React), PostgreSQL, and a simple Node/Next API. Core features in scope: (1) onboarding questionnaire mapped to a plan schema; (2) coach-facing plan editor storing exercises and meal items; (3) user-facing plan view and logbook (workouts, meals, weight) with simple progress charts; (4) one-to-one chat (WebSocket or Pusher) with message persistence and email/push notifications; (5) serve demo exercise videos via an S3-compatible bucket and player; (6) simple calendar-based videocall booking (no payment integration). Out of scope: large curated food database (seed with a small sample), payment subscriptions, mobile-native apps, advanced personalization ML. Include input validation, error handling, authentication (Clerk or Auth0), tests for API endpoints and core UI flows, and Docker-based deployment scripts for a single VPS.
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 3 cited sources+3
- Evidence score60
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 3
Every page the run actually retrieved.
- official productBuiltdifferent - official product
- open sourceSnouzy/workout-cool
- open sourcewger-project/wger
Integrity checks
What held up, and what did not.
