StackUp – Simple Gym Tracker

Undisputed Development

About this app

The gym tracker that answers the only question that matters: what do I lift today?

StackUp's arrow system turns your reps into a decision:
▲ above your target range → more weight next time
▬ inside the range → the weight stays
▼ below the range → less weight next time

HOW IT WORKS
• Log your reps per set — the arrow appears as you type and shows what it means: "16 reps → next time 62.5 kg ▲"
• Finish the workout — StackUp remembers every arrow
• Next session, the adjusted weight is already filled in. No spreadsheets, no math at the squat rack.

SMART, NOT BLOATED
• Deload detection: three ▼ sessions in a row and StackUp suggests a real reset instead of another small step down
• Personal records: beat your all-time best and the finish summary celebrates it
• "Last time" on every exercise: 15/12/9 @ 60 kg — right where you need it
• Tap the arrow to override any suggestion. You stay in charge.

157 EXERCISES, OR YOUR OWN
• A full library — barbell, dumbbell, machine, cable, bodyweight — filtered by muscle group
• Cardio too: log time and distance, with a stopwatch that keeps running if you leave the app
• Supersets and circuits: group exercises and StackUp rests between rounds, not between sets
• Add your own exercise in seconds. Nothing is locked.

EVERYTHING YOU NEED, NOTHING YOU DON'T
• Ready-made splits (Upper/Lower, Push/Pull/Legs, Full Body) — fully editable
• Per-exercise rep ranges and weight increments
• Progress charts for every exercise
• Backup & restore — your data, your file
• kg or lbs, dark mode, English & German

PRIVATE BY DESIGN
Free. No ads. No account. No cloud. Works offline — your training data never leaves your device.

EARLY DAYS — AND THAT IS THE POINT
StackUp is young and built by one person who trains. Every feature here came from someone asking for it. Mail me and you get an answer, not a ticket number: [e-mail]

Simple. Mature. Built for people who lift.

What’s new

157 exercises, up from 20:

• A full library — barbell, dumbbell, machine, cable, bodyweight — with a muscle-group filter in the picker
• Cardio: log time and distance, with a stopwatch that survives leaving the app
• Supersets and circuits: group exercises, and rest between rounds instead of between sets
• Filter your stats by muscle group
• Every exercise and split now has its own icon
• Sharper, more legible type throughout