Every set has a reason.
ThreeByEight is a lifting tracker that plans your progressive overload weeks ahead, then tells you exactly what to lift today — and why. No black-box numbers, no guessing what to add.
iPhone app coming
“You topped the range — 10 at 140. That weight’s done its job: up to 145, rebuild from 6.”
That’s the whole product. Every target comes with the sentence that justifies it — and you can always override it.
How it works
Three moves, then it runs itself.
A strength training planner that runs the block for you: set it up once, log your sets, and it decides what comes next.
Build the block
Pick your days, your lifts, your priorities per muscle. Your whole block gets laid out at once — the last week is a deload week, planned in from the start.
A workout log that’s two fields and a button
Warm-up ramp, plate math, rest timer, one-tap set logging. Two fields and a button — the same three taps every set.
Progressive overload that explains itself
Next session’s target arrives with its reasoning attached, traced to the sets you actually logged. Disagree? Override it.
The whole block
You can see the whole mesocycle at a glance.
Weeks down, sessions across. Green is done, orange is live, violet is the deload waiting at the end. No mystery about where you are in the block or what’s left of it.
Offline first
The basement gym has no signal. Log anyway.
Every set you log lands locally the instant you tap it and syncs when you’re back on a network. No spinners between sets, no lost workout because the elevator ate your bars.
Cardio
Rides and runs live in the plan, not beside it.
Zone 2 work sits in the same week as your lifts, scheduled and logged the same way — a first-class part of the block instead of a separate app you forget to open.
Questions
Progressive overload, deloads, and the rest.
What is progressive overload?
Doing a little more over time: more reps at the same weight, then more weight. ThreeByEight plans it for every lift, so you never have to guess what to add.
How does a weight lifting app decide when to increase weight?
ThreeByEight uses double progression, anchored to your last top set:
- Hit the top of your rep range → it adds weight and drops you back to the bottom of the range.
- Land inside the range → same weight, one more rep.
- Fall short of the bottom → repeat the weight, aiming for the bottom of the range again.
Every target comes with the sentence that says which of those happened.
What is a deload week?
A planned lighter week that lets you recover before the next block. ThreeByEight makes the last week of every block a deload: on weighted lifts the load drops two increments below your last top set, and the number of sets is halved (rounded up). It’s planned in from the start, not improvised.
What is a mesocycle?
A training block of several weeks, built toward a deload. ThreeByEight lays out your whole mesocycle at once (two to eight weeks), so you always know where you are in it.
Does it work without signal?
Yes. Every set saves on your phone the moment you tap it and syncs later.
Know your one-rep max? Work it out here.
Next session’s numbers are already decided.
Install it before your next training day and start the block properly.
iPhone app coming