Eating in a surplus and lifting hard is the easy part. The hard part is knowing if it's turning into real muscle or just fat. Bion's Muscle Gain Score tells you.
For lifters who want the surplus to build strength and lean mass, not regret.
Your Muscle Gain Score answers one thing: is the bulk actually building muscle? It reads your strength and lean mass against your own normal, so real progress stands out from your usual ups and downs. Do more, hit your protein, push a set, and the number climbs. A low score isn't failing; it just means there's room to climb, and we show you how.
Your sets, your protein, your weight. All in one app, in a few taps. Bion reads your gym log as the measurement, so there's nothing extra to do.
It watches your strength and lean mass climb against your own normal, so a good week is real muscle, not just a heavier scale or water.
Your Muscle Gain Score says if the surplus is working, and the next lever to pull: more protein, one more set, a bit more rest. Watch it climb.
A Friend Crew is voluntary social support. Invite people you already know, choose whether to share your personal Score, and leave at any time. It stays separate from Bion Care, Program Community, and any funded programme.
Each person keeps their own reading. Sharing is optional, visible, and revocable.
Your data can support your decisions without becoming a public claim about you.
See if it's working, and exactly what to do next. Free to start.