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💪 Body Transformation

FitOS

Calories, workouts, and measurements in one place.

A real calorie and macro calculator, a full 7-day bodyweight workout plan, and body measurement tracking — no gym required. Built for fat loss, muscle gain, or recomposition.

What’s Included

  • ✓TDEE calculator (Mifflin-St Jeor BMR)
  • ✓Four goal modes: Fat Loss / Recomp / Muscle / Maintain
  • ✓Food database (40 Indian + general foods)
  • ✓Live macro progress bars
  • ✓7-day bodyweight workout plan
  • ✓Custom exercises per day
  • ✓Body measurements + BF% trend chart
Technical Details
FormatSingle HTML file
Works OnAny modern browser
InternetWorks fully offline
LicensePersonal, lifetime
One-time price
₹349
$4.49 USD via PayPal
Buy Now — ₹349
✓ Instant download after payment
✓ Invoice sent to your email
✓ Lifetime license — no subscription
✓ Works offline in any browser
🔒 Secure payment via Razorpay / PayPal
Dashboard Preview
fitos — dashboard
fitos — dashboard Dashboard Preview
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Common Questions

QUESTIONS BEFORE YOU BUY

Instant download of a single HTML file for FitOS. Open it in any browser (Chrome, Safari, Firefox, Edge) and you're using the app. No installer, no account, no setup.
Locally inside your browser on the device you use. Nothing is sent to any server. Sync between devices by saving the file to iCloud / Google Drive / Dropbox.
Yes. Open the file in mobile Safari or Chrome, then "Add to Home Screen" to install it as a full-screen app. Works exactly like a native app.
Yes. All updates to FitOS are included for life. You'll get an email with a fresh download link each time a new version drops.