Give your next
workout a direction.

Stack Pro helps you decide what to lift, what to load and where your week needs attention.

Your workout log stays free. Add these tools when you want more from it.

A next set
you can work toward.

Smart Targets suggest weight and reps from your logged sets. Keep the last session in view, see a suggested next step and adjust it to fit how you feel today.

Last set → Suggested target → Your decision

Targets are suggestions, not a promise of results or a substitute for your judgment.

Last session, current set controls and suggested next-set target — Example data. You choose the weight and reps you log.

Load the bar.
Skip the math.

Choose a weight and see the plates for each side. Spend the time between sets getting ready for the next one.

The plates needed on each side for a chosen barbell weight — Actual Stack Pro plate calculation.

Spot a gap.
Know what to change.

Add a suitable exercise to another scheduled routine, or make a small increase to an existing exercise. Preview the sets per workout and weekly effect before you save.

Weekly targets are guides. Build up over time or spread work across your training days. Your plan changes only when you save.

A suggested new exercise in another scheduled routine, with its weekly effect — A new exercise, two sets per workout, and a clear weekly preview.

Your next set.
Right on your Lock Screen.

Check your rest, add a little time or repeat your previous set without reopening the app. Pro brings those controls to your compatible iPhone's Lock Screen and Dynamic Island.

Lock Screen rest and repeat-set controls — Actual iPhone Lock Screen detail. Compatible iPhones only.

More ways to make
the work your own.

See change beyond the numbers: Compare progress photos and keep a visual record alongside your lifts.
Work toward your next max: Follow a guided one-rep max test, with steps you can adjust.
Stay with the set: Use Gym Mode for a focused workout view and get exercise replacement suggestions when your plan needs a change.
Make Stack feel like yours: Choose extra themes and custom appearance controls. Preview a few looks.

One Pro upgrade.
Three ways to keep it.

All three options include the same Pro tools. Current prices and any eligible offers are shown in your local currency in Stack before you confirm a purchase.

Yearly

A year of Pro, billed annually.

Auto-renews until cancelled.

Monthly

Pro one month at a time.

Auto-renews until cancelled.

Lifetime

Pro with a one-time purchase.

No recurring subscription.

Manage or cancel subscriptions in your Apple Account settings. Deleting Stack does not cancel a subscription. Purchase terms.

Start with a worthwhile free app.

Workouts, routines, history, basic strength trends, the muscle map and data export are free. If a Pro subscription ends, your saved training data remains available.

Your next workout.
A little less guesswork.

Start logging free. Add Pro when you want more direction.

For iPhone and iPad. Optional in-app purchases.

Give your nextworkout a direction.

A next setyou can work toward.

Load the bar.Skip the math.

Spot a gap.Know what to change.

Your next set.Right on your Lock Screen.

More ways to makethe work your own.

One Pro upgrade.Three ways to keep it.