Trainerize
Introduction
Trainerize partnered with Spark Labs to modernize its mobile app and backend architecture, enabling thousands of trainers and wellness professionals to deliver personalized fitness experiences at scale. By combining a modular, multi-tenant infrastructure with a cross-platform mobile app, we empowered trainers to fully customize their client experiences while maintaining top-tier performance and reliability.
Client
Trainerize
Industry
Fitness & Coaching
Services
UX/UI Design
Mobile App Development
Multi-Tenant Architecture
Data Architecture
DevOps
Objective
Create a scalable, customizable mobile experience that could empower trainers to offer fully branded apps to their clients—without sacrificing performance or backend reliability.
Beyond basic workout tracking, the goal was to deliver a platform that gave trainers the freedom to design unique experiences for their clients, from branding and messaging to personalized coaching journeys. Trainerize needed a system that could support rapid growth, global expansion, and trainer-level customization, all while keeping the user experience seamless and intuitive.
Process
We started by analyzing the trainer and client user journeys, identifying friction points where technology could enhance engagement. Working closely with Trainerize’s product team, we defined key use cases: high-performance cross-platform app delivery, secure data separation for each trainer’s clients, and a powerful backend architecture to support custom branding and dynamic content delivery.
Collaboration was key. Our team developed a multi-tenant architecture that allowed each trainer to brand and customize their own app instance. We leveraged React Native to deliver a consistent experience across devices, and implemented AWS Lambda and CockroachDB for backend scalability. Simultaneously, we built a drag-and-drop customization engine so trainers could personalize the app’s onboarding, messaging, and coaching flows.
Outcome
The result was a white-labeled, scalable mobile app that empowers thousands of trainers globally. Trainers can now fully customize their app—brand colors, logos, onboarding, and personalized workouts—giving clients a seamless experience that drives engagement and loyalty.
Since rollout, Trainerize has seen a significant reduction in deployment time and a measurable increase in trainer satisfaction and client retention. By merging robust backend architecture with intuitive customization, we helped Trainerize scale its platform while giving every trainer the power to deliver their unique brand experience.
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