321FIT Hero Screenshot
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Turn your workout into an old-school arcade session: build playlists of exercises, press play, and let stick-figures, chiptune beeps, and ETA displays guide you to mad gainz! The most fun, ad-free way to get strong.

Available now on:

Get it on Google Play Download on the App Store

Make Workouts Simple

Workout Interface GIF

Pick a workout, press play, and just do what the app tells you to. 321FIT guides you through every exercise with timers, audio cues, and a blocky stick-figure animation. Know exactly when you'll finish with the unique ETA display.

Fully Customizable

Customization Screenshot

Create your own exercises, duplicate workouts, tweak colors, add scanlines – make it yours. Now with foldable phone support and ultra-tall screen optimization, so you can use any device.

Ad-Free & Efficient

ETA Display Screenshot

No ads, no subscriptions. Simple, fast, and fun – perfect for busy people who want maximum gym time without distractions.

Press & Reviews

Stuff Magazine Review Preview

App of the Week: Stuff Magazine

“A straightforward, flexible, usable workout aid, with a dash of oddball retro charm.”/p>

Daikon Media Review Preview

Daikon Media Review

“Retro Music Player Design • Customization options • Smooth Performance” – Highly recommended!"

Pocket Gamer Feature Preview

Featured by Pocket Gamer

From the developer of 321FIT: Bearplane, PocketGamer's Game of the Week, is out now! Check out the latest from Matthew Burton.

FAQ

What makes 321FIT different?

It's designed like a retro music player: workouts = playlists, exercises = tracks. Pixel art animations, chiptune sounds, and an ETA clock make fitness fun and efficient.

Is it free?

Completely free and ad-free on both Android and iOS. No in-app purchases.

What's new in the latest update?

Version 1.6 (Dec 4, 2025): Full support for foldable phones (Razr, Z Flip), optimized layouts for narrow/tall screens, new splash screen and logo.

Who made 321FIT?

Indie developer Matthew Burton created 321FIT back in 2019. After getting out of shape and nearly hiring a personal trainer, he decided to channel his love of app development — and his obsession with the glowing green retro terminal aesthetic — into building the workout app he actually wanted to use. The result? A completely free, ad-free tool that's been helping people crush their fitness goals with pixel-perfect style ever since.

Where can I give feedback?

Email the developer directly or leave a review on the store. Updates are ongoing!