Peak
82How high your biceps stands when you flex. The long head.
Incline, Bayesian and drag curls
AI arm scanner and biceps plan
Bigger arms.
Measured weekly.
One photo scores six zones of your arm, from biceps peak to forearm. BicepsMaxx then builds every session, protein target and coaching tip around the zone that's holding you back.
Start on the web
iOS and Android coming soon.
3-day free trial on the yearly plan. Start on the web.
AnalysisNext scan 6d 21h
74Arm score
- Peak82
- Thickness76
- Brachialis58
- Forearm71
- Symmetry88
- Definition69
Three steps, every week
- 1
Scan
Flex for one photo. Get an arm score, six zone scores and a body fat estimate in about ten seconds.
- 2
Train the weak zone
Each session opens with two movements for your weakest zone, then a heavy builder and a triceps finisher, sized to your gym or your living room.
- 3
Rescan and measure
Same pose, same light, seven days later. Your score, each zone and your tape measurement, side by side.
Six zones decide how big your arm looks
Most people curl harder and hope. A tall peak with a weak brachialis still looks flat from the side. The scan tells you which one to fix first.
Thickness
76Width from the front. The short head.
Heavy barbell, preacher and wide-grip curls
Brachialis
58The muscle underneath that pushes the biceps up and out.
Hammer, cross-body and reverse curls
Forearm
71Forearm size relative to the upper arm.
Wrist curls, carries, dead hangs
Symmetry
88Left versus right, in size and shape.
Single-arm work, weak side first
Definition
69Separation and detail. Mostly body fat.
Calories on target, protein high
Example scores. Yours come from your own scan.
A workout player that coaches your tempo
Turn on the tempo coach and your phone taps your wrist through every curl, pause and lower, so you can stay in the set instead of counting. Rest timers, weight memory and personal bests are built in.
Protein first
Snap your plate. The AI estimates calories and macros and rates the meal for arm growth. Your daily protein target comes from your bodyweight and goal.
Coach Flex
An AI coach that knows your scan, your plan and what you ate today. Ask why your peak is lagging; get sets and reps back.
A tape beats a guess
Log your flexed arm each week. Centimeters on a chart are the most honest progress check there is.
Works offline
Signed in once? Train and log for 30 days without signal. Everything syncs when you're back.
The plan follows the research
- 10+ weekly sets per muscle grew nearly twice as much muscle as under 5 in a meta-analysis of volume studies. Schoenfeld, Ogborn & Krieger, 2017
- About 1.6 g of protein per kg of bodyweight is where added protein stopped improving gains. Morton et al., 2018
- Training at long muscle lengths, like incline curls, produced more growth than short partials. Pedrosa et al., 2022
One plan. Cancel anytime.
3 days free
Yearly
$39.99/year
About $0.77 a week
Weekly
$6.99/week
Billed every week
- Weekly AI arm scans
- Weak-zone workouts for home or gym
- Food scanner and protein targets
- Coach Flex, your AI coach
- Progress charts and tape tracking
Start on the web
iOS and Android coming soon.
Questions
How does the arm scan work?
You take one photo flexing both arms in good light. A vision model scores six zones from 0 to 100, estimates body fat, and names the zone holding your arm back. Scores are estimates for training decisions, so we also ask you to log a tape measurement each week.
Do I need a gym?
No. Tell us you train at home and every session uses bodyweight, dumbbells, bands or a pull-up bar. Gym plans add cables, barbells and machines.
How fast will my arms grow?
It depends on training age, sleep and food. Beginners commonly add visible size within 8 to 12 weeks of consistent training and enough protein. The app shows your real numbers so you can see whether the plan is working for you.
What happens to my photos?
They're used only to score your arms, stored privately with your account, never used for advertising, and you can delete any scan or your whole account inside the app.
Does it work offline?
Yes. Once you've signed in, workouts, meals and measurements work without a connection for up to 30 days and sync when you're back. AI scans, food photos and the coach need a connection.
How much does it cost?
There's a 3-day free trial on the yearly plan, then $39.99 a year. A weekly plan is $6.99. Cancel anytime from your App Store, Google Play or web receipt. Prices may vary by country.
Start with one photo.
Start on the web
iOS and Android coming soon.