It picks the weight.
You just lift it.
No badges, no beginner mode. Autoregulated loads and weekly volume per muscle — and the rules it decides by are yours to tune.
GETSIXPACK
Built for lifters, not beginners
Four years of sets. One number that matters.
- Calls your next loadScored against your rep range. The gate is the last set's RIR.
- Counts the week, per muscleHard sets against MEV, MAV and MRV. Zeros included.
- Backs off before you stallTwo fatigue markers in the log, not a date on a calendar.
Why it's different
Logging was never the hard part
You already have four years of sets in something. It has never once told you what to do with them.
The coach
It doesn't say “nice set”
Nothing goes up unless every working set hit the top of the range and the last one came in at 2 RIR or better. A high score on its own adds nothing.
And it hands you the arithmetic. Read it, disagree with it, log the set you were going to log anyway. It does not sulk, and it does not hide the number it used.
Readiness is the one term you can skip. Skipped, it returns 1.00: it can hold an increase back, never push one through, and never on its own.
Bring your own rotation
Four minutes to set it up. It calls your next load after one session.
On the floor
Ninety seconds. One hand.
The other one is on a bar, and the phone is a metre away on the bench. Everything you touch mid-set clears 44px.
Effort starts empty, because pre-filling it means people log it by reflex. RPE 10 is zero reps left, not failure, and a miss is its own mark — calling 10 “fail” is how you end up with a log full of 9s and a coach quietly under-loading you for a month.
Rest
Your rest timer has been lying to you
Lock the phone and a timer that counts its own ticks stops counting. You come back to a clock reading 1:12 and take a two-minute rest thinking it was ninety seconds.
This one holds an instant and subtracts. Sixty ticks and one number, readable with the phone propped against a plate stack, and never modal — rest is the only window you get to fix the set you just botched.
Volume
When did you last train calves?
Weekly hard sets per muscle against MEV, MAV and MRV. Every muscle listed, zeros included, because a muscle you have not trained cannot show up in a count of what you trained.
Then it names the lift that takes the extra set: something already climbing, never one it is backing off, ties broken toward whatever carries the fewest sets.
How it works
The whole coach is three moves
Hit the top of the range
Same weight every session until every set gets there. A compound sits at 6 to 10.
9, 8, 8 reps → not there yetAnd the last one has to be hard
Two reps left in you at most. If five more were in there, it does not count.
10, 10, 10 reps → and it was a fightThen it adds one notch
The smallest jump the equipment allows, never a percentage. Then you climb again.
+5 lb → back to about 6 repsDetails
Nine things you're currently doing in your head
- Units per exercise
- kg rack, lb dumbbells. The choice follows the movement.
- Plate math, per side
- Real plates for that unit. Tells you when you are 5 lb short.
- Sets counted three ways
- Warmups nothing. Working sets everything. Drops, volume only.
- e1RM that names its formula
- Epley, Brzycki or Lombardi. They disagree by 8%. Compounds only.
- Rest lives on the exercise
- 3:30 after squats. 1:30 after leg extensions. Set once.
- It never punishes its own call
- Reps drop when load goes up. It checks the weight before it reads the reps.
- Offline by default
- Writes queue on the device and return instantly.
- Per-side loading, handled
- It already knows which lifts double their volume.
- Everything recomputes
- Flip to kg and four years of history follow.
Deliberately missing
Nobody ever got stronger by opening an app
- No streaks, badges, rings or XP.
- No confetti for opening the app.
- No feed, no followers, no leaderboard.
- No ads.
- No tutorial explaining what RIR is.
- No verdict without the arithmetic under it.
Writing
Written between sets
Logging Estimated 1RM: three formulas, three answers 
Deload weeks: markers, not the calendar Every fourth week is a scheduling convention, not a training decision. The signals that actually mean you need a deload, and why one on its own is never enough. 
It does the math between your sets
Questions
Ten things people ask before installing
Who is this for?
Lifters who already log every set and want something done with them. It assumes you know what a working set, a rep range and RIR are, and it never explains them to you.
Does it write my training programme?
No. You bring the rotation — the workouts, in the order you run them. It decides the load and reads the reps, session to session, inside the programme you already believe in.
How does it decide the weight?
Double progression with a binding gate: nothing goes up until every working set hits the top of the rep range and the last one comes in at 2 RIR or closer. Then it adds one equipment increment — the smallest jump the equipment allows, never a percentage.
The whole algorithm →Do I have to log effort on every set?
No. Effort is collected on straight working sets only, never on a warm-up or a drop, and leaving it blank is allowed — an unrated last set is read as a hard one, so it can never trigger a load cut on its own.
Can I set my own rep ranges, rest and increments?
Per exercise, all three. Leave any of them blank and the movement takes its class default. The increments matter more than people expect: a pinned 10 lb stack and a barbell with microplates are different grids, not different preferences.
Does it work in kilograms or pounds?
Both, chosen per exercise, because gyms are mixed — a kg rack next to lb dumbbells. Everything is stored in kilograms, so switching a lift changes what you read and never what was recorded.
Does it work with no signal?
Yes. Writes queue on the device and return instantly, then sync when they can. Nothing waits on a request to consider a set logged, which is the only design that survives a gym basement.
What happens if I take two weeks off?
The prescription waiting for you is the one written the day you last trained, so it is adjusted when you open it. It takes two reasons — a real calendar gap and a gap well past that lift’s own cadence — because on a long rotation ten days between outings is simply normal.
When does it tell me to deload?
When two fatigue markers stack in the log, and at most one of them can be the calendar. A deload placed mid-block purely because it was due produced no growth benefit and measurably cost strength, so a due date suggests one and never announces one.
What happens to my training data?
It is your log and your email address, and nobody else sees either. No ads, no advertising pixel, no feed, nothing sold. Ask for a copy or a deletion and it gets done.
What is stored, in full →One email a week
Training, with the papers attached
Sunday. One article on the part of lifting that is decided by arithmetic — and a release note when there is genuinely one.