Celerise · AI workout tracker · iOS
Progressive overload, made a system.
Most lifters stall because they train on feel. Delta remembers every set, shows you exactly what you lifted last time, and tells you what comes next.
Feel lies. The log doesn't. Delta keeps every set, every rep, every kilogram — and reads them back as instruction.
The logger · free
Two taps. The set is kept.
Last session's numbers wait in the boxes. The timer starts itself. You just lift.
55:30
Exercise 1 of 3
Barbell Press Under
+ Add set
Add a note…
New record
47.5 kg
barbell press under · auto-detected
Previous
Last time waits in the boxes — nothing to retype.
The step
Tap once. The top set fills.
Logged
Tap twice. The set is kept.
Auto-counted
Volume, sets and the rest timer keep themselves.
New record
PRs are detected the moment they land.
Previous
Last time: 100 × 8. Already in the boxes.
fully offline · synced when the signal returns
Delta Premium · the trainerPremium
A trainer that reads
your log, not a script.
Every recommendation is built from your sets — not a template.
01 / Evolve
A photo becomes a program.
Take a photo, pick your goal physique. Evolve builds a week-by-week transformation program — and rebuilds it as your body changes.
02 / AI Coach
Guidance drawn from what you actually lifted.
Not a chatbot with a gym vocabulary. The coach reads bar speed, volume and recovery from your log before it says a word.
03 / Routine Creator
Describe the goal. Receive the routine.
Four days, push pull legs, dumbbells only — say it once. A complete routine arrives, sets and reps decided.
04 / Form Check
Record the lift. Read the technique.
Film a set and the AI traces the movement — joint angles, bar path, depth. The feedback is specific enough to act on.
05 / Readiness
Know how hard to push today.
A short check-in before you train. Delta weighs sleep, soreness and recent load — then sets the day's intensity.
06 / Daily Insight
One read, drawn from your own sessions.
Each day Delta surfaces a single observation from your last 14 days — what's trending, what to rest, what to do next. No dashboards to dig through.
Daily
One insight
Weekly
The check-in
Monthly
The report
It watches daily, speaks weekly, and writes the report monthly.
The metaphor
Steel doesn't ask to be forged.
It is struck until it holds an edge.
The Forge · rank
Every set adds weight.
Each completed set earns XP. Five metals, Iron to Obsidian. The rank is earned, never bought.
Progress
Measured,
not remembered.
Strength and volume for every lift. A heatmap of what you trained — and what you have been avoiding.
Muscle heatmap, this week: quads and hamstrings around 95 percent trained, chest 90, lats 85, glutes 80, shoulders 70, triceps and biceps around 65, traps 60, core 50, lower back 40 — while forearms and calves sit cold under 20 percent. Intensity is measured in sets per week.
12 jan
12 jun
−9.4 kg
Chest
104.5 +2.1
Waist
81.0 −3.4
Arm
39.2 +1.3
taps to a set
exercises, with video
metals to earn
languages
Routines · library
The plan is set
before you arrive.
Build your own routines or start from ready-made programs. The weekly planner schedules the training — you just show up.
Fifteen hundred movements, with video. Or build your own.
Mon
Push A
Tue
Pull A
Wed
rest
Thu
Legs
Fri
Push B
Sat
rest
Sun
rest
Program · 6 days
Push Pull Legs
Hypertrophy · intermediate
Program · 3 days
Full-Body Base
Strength · beginner to solid
Apple Watch · iOS
The phone stays
in the bag.
A full watch app, a Live Activity on the Lock Screen, and the Dynamic Island keeping count.
Logs sets, runs timers, computes plates. Heart rate from the watch — or a chest strap over Bluetooth.
Widgets
Home Screen, at a glance
Share cards
The session, framed
Apple Health
Written back, automatically
35+ languages
Spoken almost everywhere
Offline
No signal required