Free to start — the same system I use, in your pocket.
A full interactive training system — personalized calorie and protein targets from your own numbers, a program matched to how many days you can train, rest timers, a session stopwatch, and a Form Guide with animated movement patterns. It works for any adult who wants a real plan, not just one age group — your calorie and protein targets are calculated with the Mifflin-St Jeor equation, the clinically accepted standard, from your age, height, weight, sex, and activity level. Installs on your phone like an app, works offline at the gym.
Open the Trainer → Screens and details →
Opens in your browser and installs to your phone’s home screen like an app — no download, and it works offline at the gym. Free to try, then a simple subscription.
One dashboard for the numbers that actually matter now — weight, activity, food, and blood sugar, tracked together instead of scattered across five different apps.
Open Prime Chapter Health → Screens and details →
I never measured my blood sugar at home — and my A1C still came down. I brought it from 7.2 to 5.3 by tracking one number every morning, my weight, and letting bloodwork every few months tell me whether the direction was real (the full story is in the A1C article). I do not pretend otherwise. But plenty of people are asked to test by their doctor, and every tracker I looked at buried glucose three menus deep as if it were a specialty item. So this one puts blood sugar on the same screen as weight, food and activity, for those who test — and works just as well for those who, like me, only step on the scale.
Weight, activity, food, and blood sugar logging with trend charts across all four — no cost to start.
Everything in Free, plus AI-driven insights connecting your blood sugar trends to what you ate and how you moved.
Everything in AI Coaching, plus a real coach reviewing your numbers with you and adjusting the plan directly.
Looking for hardware rather than software? What I actually own and travel with →
High-protein, blood-sugar-friendly recipes built around real numbers — the way I actually eat to stay strong and steady after 50. Each one lists calories and protein up front, scales to any number of eaters, keeps your screen on while you cook, and puts a timer on every step.
Once you've tried the Trainer, the Strength Starter and Body Fuel guides have the complete system written out — free.
See the GuidesThis tool is for general information only. I'm not a doctor and this isn't medical advice — check with your physician before starting a new nutrition or training program.
New articles with the real numbers in them, and early access to The Second Half Playbook. No noise, and nothing sold on.
Unsubscribe anytime. How your address is handled.
You're in — check your inbox.