Case study · Health & Wellness Technology
ThirdTone
A complete digital product ecosystem for personalized sound protocols, daily listening, editorial content, and subscription access.
The situation
Turn a deep library of therapeutic audio into a calm, personal daily practice while giving the client a practical way to manage content across mobile and web.
What we built
A cross-platform mobile app, editorial website, content operations portal, AI personalization layer, and secure cloud media pipeline built as one connected product.
The outcome
ThirdTone now has a cohesive foundation for listener acquisition, personalized recommendations, daily engagement, subscription access, and scalable content operations.
Project Overview
ThirdTone is a precision sound-medicine platform that helps listeners discover and follow audio protocols aligned with their goals. Crest Code worked across the entire product ecosystem: the consumer mobile experience, a content-rich website, an operations portal, the shared backend, and the media infrastructure connecting them.
The Experience
Personal Listening Protocols
- Short, goal-oriented onboarding
- AI-assisted content scoring and daily recommendations
- Personalized narrative cards that explain each day's practice
- Listening progress, favorites, and content discovery
Mobile Product
- Native-feeling iOS and Android experience built with Expo
- Rich audio playback for tones, journeys, and collections
- Subscription access and entitlement management
- Push notifications, analytics, and production error monitoring
Content and Editorial Operations
- Next.js portal for audio, imagery, tags, and categories
- AI-assisted metadata workflows for a growing catalog
- Astro website with journal content and editor-controlled homepage sections
Technical Implementation
The product is organized as a Bun monorepo with a Convex backend and separate mobile, admin, and web applications. Clerk handles authentication, RevenueCat manages subscription entitlements, Cloudflare R2 stores media, and a dedicated FFmpeg worker creates streaming formats and waveform data.
Result
The platform brings acquisition, personalization, playback, progress, billing, and editorial control into one coherent system. Its architecture supports a growing media catalog without compromising the quiet, intentional character of the listener experience.