Yes - every tool gives you 3 free checks with no credit card required. Filling in your numbers, browsing exercises, and building a routine is always free; the 3-check limit only applies when you reveal a result. After that, invite a friend for 3 more free checks, or subscribe for unlimited access.

Not to browse or fill in a tool's inputs. You'll be asked to sign up only when you're ready to see your actual result. Signup takes under a minute - name, age, gender, email, and phone - no password, we just email you a one-time code.

Two ways: the U.S. Navy Method, a measurement-based formula using neck, waist, height, and gender - the same standard used for military fitness tests - or an AI photo estimate powered by Google Gemini vision, which gives a visual range rather than a lab-grade number.

It's a visual estimate, not a medical measurement - think of it as "what body fat range does this photo most resemble," not a lab-grade DEXA scan. We label it clearly as an estimate on every result. For a data-based number, use the Navy Method tab instead.

You get two options: invite a friend using your personal referral link - when they sign up, you get 3 more free checks on that tool, and you can repeat this with as many friends as you like - or subscribe for unlimited access to all four tools for one month.

Every account gets its own referral link, shown right on the paywall screen. Share it by WhatsApp, direct link, or any other way - when a friend actually signs up through it, you're credited 3 additional free checks on the tool you shared it from. There's no cap on how many friends you can refer.

$20/month unlocks unlimited use of the Body Fat Checker, Calorie Calculator, Exercise Finder, and Workout Diary for 30 days. You can cancel anytime, and payment is processed securely.

Barbell, dumbbell, bodyweight, cable, machine, and kettlebell. Tap any muscle on the body map, then filter the exercise list down to only the equipment you actually have access to.

Answer four quick questions - your profile, experience level and goal, training days, and available equipment - and it assembles a real split (Full Body, or Legs/Push/Pull) from our exercise library, with sets and reps matched to your goal. You can swap any exercise for an alternative, then save the routine and check off exercises as you train.

Yes. We collect only what's needed to run your account - name, age, gender, email, phone - and never sell it. Photos uploaded to the AI body fat estimator are sent to Google Gemini for analysis and are not stored by MyAiFitness.app. Full details are in our Privacy Policy.