MustDuo iOS Jobs in the United States

About the Company

MustDuo is a wearable tracker built for lifting, designed by ex-Tesla engineers. The device uses an accelerometer and gyroscope to automatically track reps, weight, tempo, range of motion, rest intervals, consistency, workout volume, and personal records. Features include auto-plan (personalized training plans grounded in sports science), auto-track (automatic rep and weight logging), and auto-coach (performance analysis with Naya AI coach). The MustDuo device includes a built-in 1.28" touch display for live rep counting and workout navigation. Early access units are limited.

Industry

• Fitness Technology
• Wearable Devices
• AI Coaching
• Sports Science
• Consumer Hardware

iOS Engineering at MustDuo

MustDuo develops the iOS companion app for the MustDuo lifting tracker. The iOS engineering team builds features for Bluetooth device pairing and data streaming, workout tracking and analytics, personalized training plans, AI coaching (Naya), performance dashboards, workout history and progress tracking, push notifications, and device settings and firmware updates.

Products and Platforms

• MustDuo iOS App – Workout tracking and coaching
• MustDuo Device – Wearable lifting tracker
• Auto-Plan – Personalized training plans
• Auto-Track – Automatic rep, weight, tempo tracking
• Auto-Coach – AI coaching and performance analysis
• Performance Metrics – PRs, tempo, rest, range of motion
• DUO Score – Overall performance measurement
• Touch Display – Live rep counting and navigation

Work Opportunities for iOS Developers

MustDuo hires:

• iOS Developers – for fitness tracking and wearable apps
• Mobile Engineers (iOS) – focusing on CoreBluetooth for device pairing and data streaming, real-time workout tracking, AI coaching integration, performance dashboards, and push notifications
• Fitness Tech Engineers – for workout analytics and sports science
• Bluetooth Engineers – for device connectivity and data transfer
• AI Coaches – for personalized training and feedback

Why Join MustDuo

MustDuo is engineered for lifting — giving athletes real-time data, AI coaching, and personalized plans to train smarter. iOS engineers build the app that turns motion data into actionable insights. If you're passionate about fitness tech, wearables, and building products that help people get stronger, MustDuo offers a fast-paced, mission-driven environment with a team of ex-Tesla engineers. Early access units are limited, and the product is designed to work with most gym equipment — machines, barbells, and dumbbells.