You've Been Hitting Your Protein Number. But It's Been the Wrong Number.

Here's the truth almost no fitness app will tell you:

Your protein target was never actually about you. It was about your weight on a scale.

Every app does the same math. Take your total weight. Multiply it. Hand you a number. Done.

But here's the problem nobody talks about: two guys can both weigh 220 pounds and need completely different amounts of protein. One's already lean. One's still carrying fat from before he started lifting. Same scale weight, different bodies — same protein number from every app on the market.

That's not precision. That's a guess wearing a lab coat.

We finally fixed it.

Your New Protein Target Is Smarter

Nutrition GPS now builds your protein target around your lean mass — basically, the muscle-and-everything-that-isn't-fat part of you. Not just the number on the scale.

Why does this matter? Because muscle is what protein actually feeds. Fat doesn't need protein to grow. So a protein target based on your total weight can be way off if your body fat is higher than average — which is completely normal, especially early in a bulk.

Once you tell us where you're at, we recalculate your protein target around your real lean mass. No guessing. No generic number. Just your route, recalculated for you.

We Didn't Guess. We Used Real Science.

We could've just asked "how lean are you?" and called it a day. We didn't.

Instead, we start with a formula scientists have studied and published — one that uses your height, weight, age, and sex to make a smart first guess at your body fat. It's the same kind of math researchers use, not something we made up.

Then we do something most apps skip entirely: we double-check it.

Here's the problem with that starting formula — it can get confused by muscle. If you lift weights regularly, it can think you're carrying more fat than you actually are, because it can't always tell the difference between muscle and fat on a scale. That's a known issue with any formula that works off your weight alone.

So if you tell us you train, we automatically nudge your starting estimate leaner — because we know the math tends to run high for people who lift. It's a small fix, but it's the kind of detail that shows we actually thought this through instead of shipping the first formula we found.

You're Always in Control

After we make our best guess, you get the final say.

You'll see six simple options — from "Very Lean" to "Much Higher" — with easy icons, no confusing numbers. We'll already have one lightly picked for you based on the math above. If that looks right, you don't have to do anything. If it doesn't match what you see in the mirror, just tap the one that does. Takes five seconds.

Your choice always wins. We're not here to tell you what your body looks like — we're here to give you a smarter starting point and get out of your way.

Why We Didn't Just Build a Body Scanner

You might be wondering — why not just have people take a photo and let AI scan their body fat?

We looked into it. There's real, promising research on this. But the tech that actually works well is trained specifically for that one job, on huge sets of real body scans. Slapping a photo into a generic AI tool and asking it to guess your body fat isn't the same thing, and it's not something we're willing to fake our way through. We'd rather give you an honest estimate you can adjust than a scan that looks fancy but isn't actually more accurate.

That's the whole idea behind Nutrition GPS: we recalculate based on real information, not vibes.

The Bottom Line

You wanted a protein number you could actually trust. But almost every app was giving you a guess dressed up as math.

Not anymore. Your number is now built around your real body, not just what the scale says.

This is already live for our private beta. You just can't get it yet — unless you're on the list.

Be the first to get it the second it hits the App Store. Join the waitlist.