All gain.
No paayn.

Somewhere along the way, getting stronger became a production. You need a gym membership, a trainer, a program, a set of resistance bands, a foam roller, a meal plan, a recovery protocol, a wearable, and an app with a $14.99/month premium tier to unlock the features that actually matter.

The fitness industry did what every industry does: it took something simple and made it complicated, because complexity is where the money is.

Your body already knows how to get stronger. It’s been doing it for 200,000 years.

Push-ups work your chest, shoulders, and arms. Sit-ups work your core. Squats work your legs and glutes. Three movements. No equipment. The floor is the only machine you need, and every room has one.

This is not a new idea. Soldiers have known it, wrestlers have known it, your gym teacher in seventh grade knew it. It just stopped being fashionable because you can’t build a subscription business around a push-up.

The other lie

There’s a second myth that keeps people on the couch: the idea that exercise only counts if it hurts. That you need to block out an hour, drive to a gym, suffer through a workout that leaves you wrecked, shower, drive home, and then feel virtuous about it.

But your muscles don’t care about your schedule. They respond to stimulus. Ten push-ups before your morning coffee, fifteen squats while the pasta water boils, twenty sit-ups between meetings. It adds up. It more than adds up—research suggests that spreading exercise across the day can be as effective as a single concentrated session.

You don’t need one brutal workout. You need many small ones.

Think of it like this: nobody argues that you should eat all your daily calories in one sitting. Why would you cram all your movement into one either?

So we built a thing

paaynis a free fitness app for your phone. It counts push-ups, sit-ups, and squats—using your phone’s camera for push-ups and its motion sensors for sit-ups and squats. No equipment. No gym. Just you, the floor, and the phone you already own.

The name started as an acronym—Push-ups Are All You Need—but it outgrew its own name. Sit-ups and squats joined, because why stop at one exercise when three cover your whole body?

You open it in your browser. You pick an exercise. You do your reps. Your phone counts them. That’s it.

No download. No account. No setup. No paywall. No ads. No premium tier. No data collection. No social features. No leaderboard. No streak shaming. No push notifications guilting you into coming back.

We removed everything until only the useful part was left.

Those numbers above? That’s what a single day might look like. Forty-seven push-ups, thirty-two sit-ups, twenty-five squats—not in one grueling session, but scattered across a Tuesday. A set here, a set there. Your phone keeps a running total so you don’t have to.

How the counting works

For push-ups, paaynuses your phone’s camera. You set the phone down in front of you and it watches your movement to count each rep. Nothing is recorded, nothing is stored, nothing leaves your device—the video feed is processed in real time and immediately discarded. If you’d rather not use the camera, there’s a motion sensor mode—place the phone the same way and tap it with your chest on each downward motion.

Sit-ups and squats use your phone’s accelerometer and gyroscope—the motion sensors already built into every modern smartphone. Each exercise uses a different detection method tuned to that specific movement pattern.

It works in Safari on iPhone and Chrome on Android. It runs in your browser, which means there’s nothing to install, nothing to update, and nothing eating your battery in the background. Sensors and camera are only active during a set, which typically lasts under a minute.

If you want quick access, add it to your home screen. One tap, just like a native app.

It’s not really an app

We keep calling it an app, but that’s not quite right. An app is something you open, use, and close. paaynis more like a habit. It’s the push-ups you do while waiting for your coffee to brew. It’s the squats you knock out between Zoom calls. It’s the sit-ups before bed because you realized you hadn’t done any today and it takes forty-five seconds.

We built it because we wanted it to exist. We made it free because charging money for counting push-ups felt absurd. We kept it simple because simplicity is the whole point.

Three exercises. Your phone counts. Completely free. That’s the whole thing.

If that sounds useful to you, try it. Right now. It takes about ten seconds to do your first set.