A record of
getting stronger.

Stack helps you bring what you learned last workout into the next one.

You put time into training. Your workout log should give you something useful back: the weight you used last time, the progress you might have missed and a clearer view of your week.

Built around the time between sets.

Keep a routine ready, record weight and reps, and return to your workout. When you finish, revisit your history and see how your strength is changing.

Start free. Add direction with Pro.

Workout logging, routines, history, basic trends and the muscle map are free. Stack Pro adds suggested next-set targets, plate calculations, weekly plan adjustments, progress photos and other optional tools.

Your record stays with you.

Log offline and export your training data. Start without an account, or choose optional iCloud sync. Optional usage analytics and crash reports can be turned off in Profile → Privacy & Data. Read how your data is handled.

Made by Lauterstar.

Stack is developed by Lauterstar Technologies, Inc. for iPhone and iPad. Our aim is simple: help you spend less effort on logging and get more use from the record you keep.

Have a question or something that would make your next workout easier? Get in touch.