Free · Offline-first · 870+ exercises
Every rep.
On the record.
Gainzz is the no-nonsense workout tracker — log sets in seconds, run routines you'll actually follow, and watch every lift trend up.
Free forever · No credit card · Works without signal
- 870+ exercise library▪
- Rest timer▪
- Supersets▪
- PR tracking▪
- Offline-first▪
- kg / lbs▪
- RPE logging▪
- Plate calculator▪
- Progress charts▪
- Routine folders▪
What's inside
Built for the floor,
not the feed.
No social feed, no AI coach upsell. Just the three things a tracker has to do perfectly — done perfectly.
01 — Log
Log sets in seconds, not menus
Last session's numbers sit ghosted in every row — beat them or match them, one tap to confirm. Warm-up, failure, and drop sets get their own colors, and the rest timer starts itself.
- Previous values pre-filled in every set row
- Warm-up / failure / drop set types at a tap
- Auto-starting rest timer with alerts
02 — Routines
Routines you'll actually follow
Build a plan once, file it into folders, and start gym day with one tap. Supersets, per-exercise rest times, and drag-to-reorder included — no spreadsheet required.
- Folders for PPL, upper/lower, whatever you run
- Supersets and per-exercise rest timers
- Duplicate and tweak routines as you progress
03 — Progress
Watch every lift trend up
Estimated 1RM, total volume, and best sets — charted per exercise from day one. PRs are flagged automatically the second you log them, mid-workout.
- Est. 1RM, volume, and rep-max charts per exercise
- Automatic PR detection while you train
- Full workout history, searchable forever
How it works
Three steps. Zero friction.
Build your routine
Pick from 870+ exercises with photos and instructions, or create your own.
Hit start at the gym
Your plan, last week's numbers, and a rest timer — even with no signal in the basement.
Beat last week
Ghosted previous values turn every session into a target. PRs get flagged on the spot.