
Fit Principles
AI calorie & body tracker
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Free
In-App Purchases
About
Fit Principles — cut the noise, change your body.
SUBSCRIPTION REQUIRED: Fit Principles requires a paid subscription (Fit Principles Pro) to access the app's features. Every plan starts with a 1-week free trial. Monthly $9.99 or Yearly $59.99.
There's endless fitness information out there, and most of it doesn't matter. Fit Principles strips it down to what actually moves the needle, then makes it effortless to follow.
TWO PRINCIPLES. THAT'S IT.
• Fat is calories — you lose or gain it based on one thing: eating more or less than your body burns.
• Muscle is protein + strain — you build it with enough protein and progressive training.
ONE DAILY TARGET, BACKED BY SCIENCE
Tell us your goal and your timeline, and Fit Principles calculates the exact calories and protein to hit each day — personalized to your body, not a generic formula.
LOG FOOD IN SECONDS — HOWEVER YOU WANT
• Voice — just say what you ate
• Photo — snap your plate
• Text — type it
• Barcode — scan a packaged food
Our AI assistant, Accountability, identifies the food and pulls accurate calories and protein, even from restaurant menus.
YOUR PROGRESS, ON AUTOPILOT
Connect Apple Health and your weight, body fat, and calories burned sync automatically. No manual entry, no guesswork.
SEE WHERE YOU'RE HEADED
Track calories, protein, weight, and lean mass over time, with projections that show your expected body and goal date. Edit or fix any day's log — today or weeks ago.
Set your target. Log your food. Watch it work.
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Fit Principles Pro unlocks everything with a 1-week free trial. Monthly $9.99 or Yearly $59.99 (save 50%). Payment is charged to your Apple ID; subscriptions auto-renew unless cancelled at least 24 hours before the end of the period, and can be managed in your App Store account settings.
Privacy Policy: https://samuelorcutt1998-pixel.github.io/fit-principles-privacy/
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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What's New in Fit Principles
1.0
July 14, 2026
Subscription plans
Fit Principles Monthly
AI food tracking, smart insights, and custom goals.
$9.991 Month
7 Days trial




