The logger · free
Log
Two taps. The set is kept.
- Previous values pre-filled
- Auto rest timer & plate calculator
- Fully offline, synced later
Health & lifestyle software · home of Delta
Vital, by design.
We build training software that remembers every set — starting with Delta, the AI workout tracker for iOS.
Strength is not a mood to chase. It is a number to move. We build quiet, beautiful software that remembers how you lift, rest and recover — then tells you what comes next.
01 — The flagship · Delta
1 / 4
AI trainer · premium
Coach
It reads your log before it speaks.
- Evolve: photo → program
- Form check & plateau breaker
- Readiness check-ins
Tracking
Progress
Measured, not remembered.
- PR & volume trends per lift
- Muscle heatmap
- Photos & measurements
Rank
The Forge
Earned, never bought.
- XP for every completed set
- Iron → Obsidian, five metals
- Streaks that survive winter
02 — The method
One log.
Every signal.
Delta reads from — and writes to — a single, private picture of you. Log the work, and the trainer plans the rest around it.
01 / Log
Two taps, the set is kept.
Previous values wait in the boxes, the rest timer starts itself and the plate math is done before you rack the bar. Fully offline.
02 / Read
Every signal, one timeline.
Sets, readiness, records, reports — everything writes to one private timeline, so patterns surface that a notebook never could.
03 / Recover
Rest is part of the program.
When the log says you're running hot, Delta schedules the quiet: lighter plates, longer rest, a slower Tuesday. On purpose.
03 — The receipts
Felt daily.
Measured nightly.
average store rating
taps to log a set
exercises, with video
languages spoken
Press: “Progressive overload, minus the spreadsheet.” — Form & Function. “Finally, a lifting app that says less and knows more.” — The Interface. “The logger every gym deserves.” — Bodywork Review.
Designed for the body.
Tuned to the pulse.
move your pointer — or fling the page
04 — Voices
Kept records.
I stopped guessing weights. Delta knows what I did last time and tells me what comes next. The PRs followed.
“It's the only training app that has ever told me to lift less. My shoulders send their regards.”
The rank system got me through winter. You do not walk away from a Damascus streak.