You don’t need more motivation.
You need fewer decisions.
Every fitness app makes you decide first. Lift second.
Today’s is already picked. Do it solo, or drag the group chat into it.
35 minutes. Five blocks. Zero planning.
Choose your time, equipment and focus. Kronos builds the workout, guides every set, and learns what you’ll actually do.
How it works
What one tap actually does.
Tell it once
A place, a time, a focus.
That’s all it asks. The rest it remembers.
- It already knows what’s at your gym.
- It already knows you only have 20 minutes.
- It already knows you skipped Tuesday.
- It already knows you hated lunges last time.
- It already knows you’ve done legs twice this week.
So you don’t have to.
Hotel room? Hotel workout. Save your spots, switch in one tap, and the workout reshapes itself around whatever’s there.
Watch it build
Thirty seconds of thinking. None of it yours.
It reads your history, weighs your options, and writes a real session: warm-up, working blocks, rest that fits. Not quite right? Rebuild it, or swap a single exercise.
And 35 minutes means 35 minutes. The slider is a promise, not a mood.
Just lift
Press start. Stop deciding.
A calm timer walks you through every set and every rest. What’s next is always on screen. No tapping mid-set, no spreadsheet on the bench.
It even remembers what you lifted last time, down to the kilo.
The details that make one tap trustworthy.
Proof, not promises. Straight from the app.
A real plan, not a random list
Blocks that belong together: warm up into the heavy work, finish clean. Timed to your minutes, built from your equipment.
Strength without the spreadsheet
Weight and reps arrive pre-filled from last time. One tap logs the set, mid-rest. Honest buttons for "did fewer" and "failed set". Or switch logging off and never see a number.
Swipe exercises, not ex’s
Love it, like it, meh, never again. Every swipe trains the next workout.
Finish with proof
Time trained, muscles worked, what the session added to your week. Post it to Strava, save it, or run it again.
Strength, when you want it
It can carry weight too.
Ask for a strength day and you get the real thing: straight sets, the big lifts, proper rest between them. It remembers what you lifted last time and fills the number in for you. Star the lifts you care about, or switch logging off and never see a number.
Challenges
An app can’t make you show up.
Your group chat can.
A challenge is a workout pact with your crew: same plan, same days, everyone on one board.
One code joins everyone.
Grab a preset or set a goal, then drop the code in the chat. That’s the whole onboarding: no spreadsheet, no group admin.
Done is a filled cell.
Do the day’s workout or hit your numbers and your cell on the board fills in, and your streak grows. Wildcards cover the odd missed day.
Cheer. Or poke.
Fist bumps and fire for whoever showed up. A well-aimed poke for whoever’s slacking. The crew sees who trained, every day.
Workout challenges
Kronos builds a fresh workout for the whole crew, on the days you pick. Grab a preset like Daily core, or set the focus, days and length yourself.
Goal challenges
Pick 1 to 4 movements and the numbers to hit, like 100 squats every weekday. The numbers climb each week and the board keeps count.
Not a 75-day bootcamp: rest days count toward the streak, and missing a Tuesday doesn’t burn the whole thing down.
What we believe
Six beliefs that built this app.
- 01
Variety beats optimization.
An "optimal" program you quit < a random workout you finish.
- 02
Constraints are features.
Only dumbbells? 18 minutes? Sore quads? That’s the design space.
- 03
Decisions are willpower taxes.
Every choice we make for you is willpower you can spend on the lift.
- 04
Today’s mood matters.
Tired-Tuesday-you deserves a different workout, not no workout.
- 05
Adherence beats intensity.
A B+ workout four days a week beats an A+ workout once. Every time.
- 06
Fun is a strategy.
Boredom is the #1 cause of churn. Interesting beats perfect.
What Kronos is not
Not throwing shade. Just being clear about who we’re for.
If you want…
A full lifting logbook
Try…: Strong or Hevy
We log your main lifts when you want it. Living in the spreadsheet is their whole job, not ours.
If you want…
A 12-week proven program
Try…: A program app
Programs assume you’ll follow them. You probably won’t.
If you want…
A human coach over text
Try…: A coaching service
Real coaches are great. They cost real money.
If you want…
A YouTube workout to follow
Try…: A follow-along channel
Great, but it doesn’t know your equipment, time, or level.
If you want…
An AI chatbot for fitness
Try…: ChatGPT
We already asked it. Here’s today’s workout.
Kronos is for people who tried those things, fell off, and want a workout to show up for, not another system to maintain.
Most fitness apps make you a workout plan. Kronos makes you a person who works out.
Fair questions.
Is Kronos free?
You get 5 generated workouts free to start. The interval timer is free forever, with no ads and no account. Challenges are free to join and do. Kronos Pro removes the caps.
What equipment do I need?
Whatever you have. A full gym, a pair of dumbbells, a hotel room floor. Tell it once and every workout is written from what’s actually there.
How is this different from a workout program?
Programs assume you’ll follow them. Kronos builds each session for the day you’re actually having: your time, your equipment, your recent training, your mood. There’s no week 7 to fall off of.
Does it work for strength training?
Ask for a strength day and you get the real thing: straight sets, the big lifts, proper rest between them. Your weight and reps arrive pre-filled from last time, and logging is one tap. Or switch logging off entirely.
How long are the workouts?
As long as you have. The slider runs from 5 to 90 minutes, and the time you pick is the time it takes. A real 20-minute session beats an imaginary 60-minute one.
Which phones and languages?
iPhone and Android, in English and Spanish (Latin America).
Now on iOS & Android
The best workout is the one you’ll actually do. The best workout is the one you just did.
Get Kronos Studio on the App Store or Google Play. A workout for the day you’re actually having, ready when you open it.
Try 5 free. No commitment.
Built for the days you didn’t feel like it.