Kairos

Buy once. Train forever.

The offline workout tracker with a coach's voice — no subscription, no account, no feed.

Free for 14 days. Then one purchase, yours forever — no subscription, no ads.

“I was paying rent on my own numbers.”
Every workout app wanted a subscription — to store sets I lifted myself. Cancel, and the door locks on your own history.
“I was at the gym, but I wasn't training.”
No plan, no target, and a phone full of feeds between sets. I'd leave after ninety minutes with no idea if any of it counted.
“I couldn't see myself growing.”
What isn't recorded doesn't grow. A notebook knows what you lifted; it can't tell you what it means.

So I built the app I couldn't find. It turned out other people couldn't find it either.

Coach Mode

You build a plan once, then Coach Mode counts you through every set, rest, and transition — hands-free, like a coach in your pocket.

Live recreation of the real session screen — watch a set finish, rest, and a PR land.

Every set, timed for you

Press start and Kairos counts you through the whole workout — every set, every rest, every transition. You never touch the phone mid-session.

Audio cues, eyes on the bar

Chimes and voice cues mark the last seconds of a rest and the start of the next set, so your attention stays on the work — not the screen.

Screen off, timers on

Accurate timers keep running even when your screen is dark. Coach Mode is still counting when you look back up.

Smart blocks

Organize your training into smart blocks — warm-up, strength, supersets, circuits, cardio, cool-down — each behaving exactly as that kind of work should. Supersets alternate with no rest. Circuits run in rounds. Cool-downs just flow.

Warm-upWorkingSupersetCircuitCardioCool-down

Everything else

Records that find you.

Beat your best and Kairos knows instantly — a quiet celebration, an Estimated 1RM, and a timeline of how far you've come.

Personal Record!

Barbell Bench Press — 82.5 kg × 8

650

exercises, ready to go.

A deep, animated library with muscle diagrams — plus room to add your own.

Goals worth chasing.

Set a target for any exercise and watch the progress bar close in, session by session.

Squat — goal 140 kg86%

Yours, and only yours.

No account. No cloud. No tracking. Free for 14 days, then one purchase — no subscription. And your data is never held hostage: logging, history, and backups stay free forever, on your device, moving with you through a single backup file.

No accountNo cloudNo adsOffline14-day free trial

You write programs for other people?

Stop sending walls of text.

Kairos for Coaches

Web plan builder

Design a single plan — or a whole training group — and export one .kros file that imports in a tap.

1

Design in the browser

The web Plan Builder uses the exact exercise library the app ships with — 650 exercises, the same smart blocks, the same rules.

2

Export one file

A single .kros file holds a plan — or a whole training group. No account needed, nothing uploaded anywhere.

3

Open it in the app

AirDrop it, message it, save it — it imports in one tap, with every block, set, and rest exactly as you built it.

Build plans in the app today. The browser builder is coming soon.

14 days, everything unlocked, nothing to cancel — there's no card on file, so nothing charges automatically. Then one payment of $19.99 and Kairos is yours forever.

Guided

Coach Mode runs the session so you can focus on the work.

Private

Offline, no account, no tracking. Your data never leaves your phone.

Yours

Free for 14 days, then one purchase — no subscription. Back up, restore, and share by file, on your terms.


Guided workouts, effortless tracking. All offline.