Strength training that adapts to what you lift.

BYGG writes you a six-week strength and muscle-growth program from your equipment, your schedule, and your training history — then rewrites next week from the sets you logged this week.

Start your 7-day free trial

$24.99 a month after the trial. Cancel any time.

A program built from your answers

You tell BYGG how many days you can train, how long a session can run, what equipment you can reach, and what your joints will tolerate. It writes a six-week program around what you tell it, rather than handing you a template to adapt yourself.

It reads what you actually lifted

Every set you log keeps the weight, the reps, and how hard it felt. Next week's targets come from those numbers, so the program follows what happened rather than what was planned.

It runs the session with you

One screen per exercise, with the target, your last numbers, a rest timer, and a swap for when the rack you need is taken. If the timer runs out while you are in another app, it tells you when you come back rather than pretending it went off. Sets log offline and sync when you are back online.

It shows the reasoning

You can open any session to see why it asks for what it does — which muscles the week is built around, how the sets are split up, and what changed since last week.

What you’re signing up for

BYGG is $24.99 a month. The first 7 days are free. You are not charged until the trial ends.

Your subscription renews automatically every month at $24.99, plus tax where it applies, until you cancel. You can cancel at any time with no notice period — in Settings under Manage subscription, or by emailing support@byggfitness.app — and you keep access until the end of the month you have paid for.

You need a card to start the trial. If you cancel before the trial ends you are never charged.