A workout tracker
that pushes back.
Log every set. Beat every PR. Zenith is the AI-powered workout tracker that's wired to a real plan — so logging changes what comes next.
iPhone · iOS 17 +
Built for serious lifters
Every feature a tracker should have.
Plus a coach behind it.
Set logging
Log sets in a single tap
Last-set defaults pre-fill weight and reps. Plate math hints. Warm-up vs working sets distinct. Rest timer that respects your last lift.
Personal records
Every PR. Surfaced the moment it happens
Zenith tracks your best e1RM, top set, and rep-PRs across every lift. Beat one and a PR banner pops in real time — no manual logging.
Strength trends
Per-exercise trendlines
Open any exercise and see your strength curve across weeks. Working weight, volume, sets — all charted, all comparable.
Streak calendar
A heatmap of your discipline
Perfect, partial, and missed days mapped at a glance. Configurable rules — what counts as a perfect day is yours to define.
Plan-aware logging
Tied to a real program
Your tracker isn't a notebook — it's wired to a periodised plan. Log the work; the engine reads it and shapes next week.
Apple Health sync
Workouts written back automatically
Every completed session is synced to Apple Health. Steps, weight, and resting heart rate flow back in to inform the engine.
Why this tracker
Logging without programming
is just a journal.
A workout tracker is only as useful as what the data feeds. Most apps stop at the log — they let you write the numbers down and walk away. You end up with a beautiful history of your training and zero feedback into next week.
Zenith closes the loop. The same screen that logs your sets feeds an AI coach that periodises your week, adjusts your working weights, and rebalances volume when you rate a session too easy or too hard. You log; the plan moves.
For lifters who want both — granular logging and a program that listens — this is the tracker.
Logbook vs Coach
Most trackers are journals.
Zenith is a coach.
Notebook tracker — log sets, get nothing back
Zenith feeds your log into a program. Logging changes next week's training
Trends hidden three menus deep
Per-exercise strength trend on the same screen as your set log
PRs only counted if you remember to mark them
Automatic PR detection across e1RM, top set, and rep-PRs
Separate app for nutrition — your training context lives nowhere
Training and nutrition share one AI context that watches both
Start logging
Your next PR
is in here.
Zenith is free to download on the App Store. iPhone, iOS 17+.
Download on App Store