Fit Duo app iconFit Duo

Two People. One iPhone. More Motivation.

Fit Duo is a dual-camera workout game for iPhone. Put the phone on the floor, drop into push-ups on opposite sides, and let the front and rear cameras count every rep — separately, live, and fairly.

Two players doing push-ups on opposite sides of one iPhone

Features

One Phone, Two Referees

The front and rear cameras run at the same time, each tracking one player. No wearables, no extra gear, no taking turns — just one iPhone placed between you.

Simultaneous Dual Cameras

Front and rear streams are captured and processed in parallel on a single device.

On-Device Pose Detection

Vision-based body tracking spots every rep from the camera each player faces.

Live Pose Skeleton

Optional skeleton overlay shows exactly what the tracker sees, so you can fix your position.

One Phone, Two Referees

Your Own Scoreboard

Every rep is credited to the right player in real time. A top bar keeps the clock, both counts, and coaching cues visible while you push.

Independent Counts

Player A and Player B each get a separate tally — no arguing over who did more.

Live Coaching Cues

Real-time prompts like “Extend your arms” or “Keep your arms visible” keep both of you honest.

Session Results

Duration, calories, and per-player reps are summed up the moment you finish.

Your Own Scoreboard

Private by Design

Camera frames are processed in memory and never recorded, uploaded, or saved. No accounts, no sign-ups, no servers — your workout history stays on your phone.

Nothing Recorded

Frames and pose data live only for the moment of analysis, then they are gone.

No Accounts, No Cloud

The app works fully offline; there is nothing to register and nowhere to leak.

Local History Only

Records store just the date, duration, counts, and coaching totals — on your device.

Private by Design

How It Works

From floor to first rep in under a minute.

01

Place the Phone

Lay one iPhone on the floor in landscape, between the two of you.

02

Take Your Sides

Each player does push-ups on one side, upper body and one arm visible to their camera.

03

Start Counting

The workout starts once both players are in frame, and every rep lands on your own tally.

Frequently Asked Questions

Ask us anything!

support@fitduo.app

2 players, 1 iPhone

Front and rear cameras referee both players at the same time — no extra gear, no taking turns.

0 data collected

No recordings, no uploads, no accounts. Frames are processed on device and never saved.

20 languages

The full app — coaching cues, results, and settings — ships in twenty languages.

Grab a Partner and Hit the Floor

The easiest head-to-head workout ever set up: one iPhone, two people, and a rep count that never loses focus. Download Fit Duo and settle who really does more push-ups.