A personal trainer in your pocket.
An AI coach that remembers everything — your sleep, training, food and mood — and adjusts your plan every check-in. The depth of a 1:1 PT, at a fraction of the cost.
Everyone else gives you
one piece.
A food app logs lunch. A workout app counts reps. A tracker draws a line on a chart. None of them talk to each other. None of them coach.
Food app
Logs lunch. Then forgets it.
Workout app
Counts reps in a vacuum.
Tracker
Draws a line. Offers nothing.
Chatbot
Generic tips, zero memory.
One coach, one voice, every surface
The same coach across chat, training, food and check-ins. It never loses the thread between screens.
Remembers everything, not goldfish memory
Sleep, mood, sessions, photos and macros all stay in context. Every reply is built on your history.
Adjusts your plan inside guardrails
Small, sensible changes to volume and targets — made for you and explained, never a free-for-all.
Trend over noise
It reads the 7-day average, so one heavy meal or one bad night never derails the plan.
It all feeds one brain.
Weight, check-ins, measurements, every meal — typed, scanned or barcoded — every set, your sleep, steps and burn. It all lands in one coach that learns how you change, then makes the call.
One loop.
Every day.
Check in, train, fuel, ask, adjust. The same coach runs the whole loop — and tightens it a little more each day.
It starts with a check-in
A few honest prompts before the day — sleep, energy, weight, photos. Under three minutes, and it sets everything that follows.
- Six quick questions, about three minutes
- Weigh-in and photos tracked over time
- Feeds straight into today's guidance
Then you train
Weight, reps and RPE, set by set, with rest timed for you. The coach reads the session live and writes the next one around it.
- Working-set card, all-time PR and live rest timer
- Form cues on demand — text and demo, not voice
- 1,376 exercises, swapped in a tap if a machine's taken
Point your camera at the plate
AI meal scan turns a photo into macros in seconds — then drops it straight into the day's calories and protein. No spreadsheet, no weighing scale.
- Photo → macros with one shot
- Daily calorie ring with protein, carbs and fat
- 80 coach recipes built around your targets
Ask it anything, all day
It answers with your numbers in hand — what you logged, how you slept, where the trend is going — then adjusts the plan and tells you why.
- Reads your food log, sleep and training before it replies
- Makes the call, then explains it in a line
- Text coaching, any time — never voice, never in-ear
Four rings. Close the day.
Train, eat, move, check in. Close all four and the day's done — and the coach has the full picture to work from tomorrow. Miss one and it knows that too.
And the trend moves
Weight trend, days closed, steps, sleep and move calories — synced from Apple Health. One screen shows where you are against where you're going.
- 14-day weight trend with target and distance to go
- Days-closed strip and a coach insight up top
- Apple Health: steps, sleep and move calories
No secrets.
Just the work.
A body-composition system built from years of coaching — not a tracker, not a chatbot. It takes graft. Stackdd is there for every rep, every meal, every check-in, and it remembers all of it.
Coaching you can take
at its word.
Every reply is checked before it reaches you
Before anything sends, each response is held against ten coaching principles — honest, specific, in scope, evidence-led, no false promises. If it doesn't pass, it doesn't send.
If a conversation points to disordered eating or crisis, the coach steps back and signposts the right help — something most fitness apps skip entirely.
Years of coaching.
Now in your pocket.
The principles haven't moved in years — train with intent, eat with awareness, judge the trend not the day. We've spent that time changing real bodies. Now the same standards live in a simple app you carry everywhere.
