Every session. Every set. Stored and searchable.

ZON keeps a detailed record of your training: every set, every rep, every RPE, every progression delta. Your log is a searchable database, not a scroll.

Free to download. Android beta: join the waitlist

ZON training screen with your program and recent activity
  • Session history with every set, rep and weight you logged

  • Search and filter by exercise, date or program

  • Per-session performance delta against the previous equivalent workout

The problem it solves
You can't remember what you lifted three weeks ago on your last squat day. You have no way to look up your best set ever on Romanian deadlifts. Your history exists, but it's not accessible.

Your training history is a competitive advantage

Serious athletes treat their training log like financial records. Every session is an entry. Every progression is a data point. The log doesn't just show where you've been, it tells you whether your current approach is working.

ZON makes your log actually usable.

What's stored after every session

When you finish a session in ZON, every detail is saved automatically:

  • Every exercise, in order
  • Every set with the exact weight and reps
  • Your RPE when you log it
  • Rest between sets
  • Session start and end time
  • Your runs, with route, pace and splits
  • The debrief with volume delta and highlights

Nothing to enter after the fact. The log builds itself while you train.

Search and filter your history

The history view is a proper database, not a chronological scroll:

By exercise. Search "Romanian deadlift" and see every set you've done on that movement, across programs and dates, sorted by date or by best set.

By date. Jump to any week or month and see what you were doing back then.

By program. Compare how you performed across different training phases.

Replay and compare sessions

Open any past session to see it in full, set by set, with everything you logged. Then compare it with a more recent version of the same workout to see exactly where you progressed and where you stalled.

This is how you spot a plateau with precision. Not with a feeling. With a set-by-set comparison.

Share a session

Any session in your history can become a share card from its detail view. Handy to post a PR to your feed or keep a visual record of a milestone workout.

Your full history with ZON Pro

Logging and recent history are free. ZON Pro keeps your full training history, so years of sessions stay searchable and comparable.


In the ZON app on iPhone. Android is in beta: join the waitlist at justzon.com/android-waitlist. ZON Pro keeps your full training history.

Your next session starts here.

Download ZON for free on the App Store. On Android? Join the beta waitlist.