Health · Do this yourself

Build your own fitness tracking app with AI, even if you have never coded.

💰 Starter Story makes about $14k a month doing this. ~$14K/month revenue (reported on Starter Story)

No X data

Based on Starter Story on YouTube (opens in new tab)

Who it’s for

Coaches, gym owners and fitness fans with an idea for an app.

Adapt it to your industry

  • Fitness coach: weekly plans and check-ins for clients
  • Clinic: draft patient reminders and plain-language handouts
  • Caregiver: keep a clear log of medications and appointments

Step by step

  1. Write down one problem a specific group of people pays to solve (for example “gym owners losing members”).
  2. Open ChatGPT, Claude or Grok and paste the prompt below to sharpen the idea and list what the first version must do.
  3. Use ChatGPT, Claude or Grok to make the first version of the product for one type of customer.
  4. Create a Stripe account and a Payment Link so people can pay from day one.
  5. Make a one-page website that explains the problem, the fix and the price.
  6. Show it to 10 people from your target group and change what confuses them.
  7. Launch where those people already gather, then ask every new user for feedback.

Ready-to-copy prompt

Add a chat coach to my lifting app: it reads the user’s program and last 7 days of sleep, and can lower volume when they say they feel sick.

Start with AI

Opens the AI with this guide and the prompt filled in.

Open in ChatGPT (opens in new tab)Open in Claude (opens in new tab)Open in Grok (opens in new tab)
Cost
$0–100/month to start (AI plan, builder, domain)Our estimate
Time
~6 months (sourced)From the source

How to make money from it

Pricing idea: Coaches can sell monthly plans with AI-assisted check-ins; apps usually sell a monthly or yearly subscription.

Finding your first 10 customers

  • Start with clients or friends you already help.
  • Share honest progress stories (with permission).
  • Partner with a local gym, clinic or practitioner.

Ideas, not promises. Results vary.

Details: source, numbers and tags

What they did

Max started with a Claude Code membership and worked in the terminal daily for six months. The app tracks lifts, sleep, nutrition and supplements, with an AI coach that adjusts programs. Stack: Claude, Supabase, Vercel, Expo, RevenueCat.

How it went

He shows nearly $14,000 in revenue over 28 days, 1,000 active subscribers and 20,000 iOS downloads, with a $24.99 yearly price.

Worth knowing

Starter Story interviews the founder and shows dashboards on camera; we have not verified the numbers. Founder-led content drives about a third of revenue, he says.

Difficulty
IntermediateOur rating
Time to build
~6 months (sourced)From the source
Monthly cost
Not reported
Revenue
~$14K/month revenue (reported on Starter Story)Third-party reported: Reported by a third party (interview, podcast or article); not verified by us
Engagement
73,589 YouTube viewsfetched Oct 15, 2026
X buzz
No X data

Posted · Added Oct 16, 2026

Original builder recipe

  • Claude Code
  • Expo
  • Supabase
  • RevenueCat
  1. Gather your documents or preferences.
  2. Ask the agent to explain and organize, not diagnose.
  3. Take its questions and summaries to a professional.
  4. Keep sensitive data private.

Tags

Industry Health Fitness

Read the original

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