Health & fitness · AI web app
BFit
An AI coach for people and fitness businesses.
An AI fitness coaching platform that creates personalized workout and diet plans — for individuals, and for gyms that offer AI coaching to their members.
- Platforms
- Web
- Role
- Product, design & engineering
- Built with
- Next.jsTypeScriptVercel AI SDKMongoDBRazorpayTwilio / AWS SNS
The challenge
Why we built it
Generic workout plans don’t fit real people. Personal trainers do — but they’re expensive, and gyms can’t give every member one-to-one attention. BFit set out to give anyone a coach that understands their goal, and to let fitness businesses offer that coaching to all their members under their own brand.
Screens
Designed for desktop and mobile
Our approach
How we designed and built it
Conversational coaching
A chat-first experience where users simply describe their goal and get a tailored plan — with suggested prompts to help them get started.
Grounded, goal-specific guidance
Workout and nutrition plans generated around each user’s goal, powered by large language models with product-specific instructions and guardrails.
Multi-tenant SaaS with usage-based billing
Individual and organization accounts, member management for gyms, OTP phone sign-in, and pay-as-you-go AI credits paid through Razorpay — with AI usage tracked per account.
Features
What's inside
- AI-generated workout plans
- Personalized meal and diet plans
- Goal-based coaching (muscle gain, weight loss, core)
- Guided prompts for fast onboarding
- Organization accounts with member management
- Pay-as-you-go AI credits and usage tracking
- OTP phone sign-in
Outcome
Results
- Live in production at bfit.predotai.com
- AI usage metered and billed per account, so costs scale with revenue
- Payments, authentication and AI usage running end to end
Want a product built with the same care as BFit?
Tell us what you're building. Within 1 business day you'll hear back directly from the engineer who would build it — with honest feedback on scope, approach and budget.
Projects typically start at $10K.