Gymbox
AI Coaching Engine That Doubled Member Engagement
2x
Member engagement increase
8 weeks
Delivery Time
Fitness & Wellness
Industry
gymbox.com
Client
Overview
Gymbox is London's most rebellious gym chain — known for unconventional classes and a strong brand identity. Despite high brand awareness, member retention was plateauing. Members signed up excited but engagement dropped off after the first month. The team wanted a way to keep members engaged through personalised coaching without hiring a fleet of personal trainers.
The Challenge
Gymbox had no unified digital experience — their website was outdated, class booking was clunky, and there was zero personalisation in the member journey. They needed a complete digital overhaul: a modern web presence that matched their brand energy, a mobile app for daily engagement, and an AI-powered coaching engine that could deliver personalised workout and class recommendations at scale.
How We Built It
Our Approach
Member Data Analysis
Analysed 18 months of booking data, check-in patterns, and class attendance across 7 locations. Identified 5 distinct member personas based on workout frequency, class preferences, and engagement patterns.
AI Coaching Engine
Built a recommendation engine that combines member history, stated goals, class schedules, and real-time capacity data. The system generates weekly personalised plans — suggesting specific classes, times, and progressive challenges tailored to each member's fitness level and preferences.
Mobile App Development
Designed and shipped a React Native app with class booking, AI-generated workout plans, progress tracking, and push notifications. The coaching engine feeds directly into the app's home screen with daily recommendations.
Website Redesign
Rebuilt the marketing site from scratch with a bold, editorial design matching Gymbox's brand DNA. Integrated class schedules, location pages, and a streamlined signup flow that feeds directly into the personalisation engine.
The Results
What We Delivered
2x
Member engagement
Average weekly sessions per member went from 1.8 to 3.6 within 3 months of launch.
10K+
App downloads in month 1
Organic adoption driven by in-gym promotion and the quality of personalised recommendations.
35%
Improvement in 90-day retention
Members using the AI coaching features were significantly more likely to stay past the 3-month mark.
Delivery Timeline
Shipped in 8 weeks
Data analysis and persona modelling
AI coaching engine and recommendation system
Mobile app development and testing
Website redesign, integration, and launch
Client Feedback
“The AI coaching engine feels like having a personal trainer in your pocket. Members are booking more classes and sticking around longer.”
Head of Digital
Gymbox
Tech Stack