Personal Fit gave trainers a branded mobile product without requiring a separate platform for every trainer. Ego Eimi’s engineering connected the native iOS experience to shared membership, workout and subscription services.
A trainer’s members expect their coach’s identity, programs and roster. Building an independent application stack for each trainer would duplicate the same account, subscription and workout functionality.
The useful architecture was a shared foundation that preserved those trainer-specific boundaries. The mobile product also needed a clear connection between paid access, assigned workouts and the member’s progress.
The native iOS application used Swift and SwiftUI. Trainer branding and rosters sat on shared infrastructure, while workout-building and progress dashboards connected the coaching workflow.
StoreKit handled subscriptions, with Firebase, Node.js and PostgreSQL in the supporting stack. The implementation brought member access and the fitness experience into the same product model.
The project delivered a reusable platform for branded trainer experiences. Shared product capabilities and trainer-specific content could evolve together without requiring every trainer to maintain a separate software system.
A white-label platform needs explicit boundaries for branding, member data and subscription access. Ownership includes the shared release process as well as the configuration of each trainer’s experience. Those distinctions help a new team improve the core without disrupting individual businesses.
Project contribution: Ego Eimi. The scope described above identifies the work behind this case.
Editorial review: Ego Eimi · Updated September 6, 2026 · About the team
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