About Youll
A platform to rapidly develop iOS and Android apps for content-on-demand subscription-based businesses.
What is Youll?
Youll is a platform to rapidly develop iOS and Android apps for content-on-demand subscription-based businesses. Created by the former Headspace team, the same people who built the Headspace iOS and Android apps, Youll enables anyone to create a Headspace-like experience for their communities.
Whether it's meditation, fitness, education, or any other content-driven domain, Youll provides the foundation to launch a fully-featured mobile app without building from scratch.
Architecture
Youll is the platform. Bricks is the shared core of Youll, the reusable codebase that every customer app consumes as a git submodule. This gives each app access to a battle-tested set of modules while keeping customer-specific code separate.
Modules
Youll offers a catalog of product modules that customers choose from when building their app:
| Module | Category | Description |
|---|---|---|
| Home Screen | Content | Personalized home feed with three implementations: Home (v1, UIKit/GraphQL, deprecated), Showcase (v2, SwiftUI/GraphQL), and Slices (v3, SwiftUI/REST) |
| Explore | Content | Browse content by categories, subcategories, and facilitators |
| Search | Content | Find content with filters and advanced search |
| Library | Content | Saved content, favorites, and user-created playlists |
| Journeys | Content | Structured multi-session programs with progress tracking |
| Events | Content | Live and scheduled events with agenda management |
| Activity | Content | Activity history, workout tracking, and session stats |
| Meals | Content | Meal plans and nutrition content |
| Player | Playback | Audio/video playback with mini player, workout player, and Now Playing |
| Timer | Wellness | Meditation/session timer with bell intervals and background sounds |
| Biometrics | Wellness | HealthKit integration for HRV, heart rate, sleep, steps, and calories |
| Community | Social | Channels, posts, replies, reactions, and moderation |
| Tuya | Hardware | IoT device control: 5 device types, BLE/WiFi pairing, scheduling |
| Onboarding | Core | Auth flows (email, Apple, Google, anonymous) and onboarding screens |
| Profile | Core | User profile, settings, subscriptions, reminders, and badges |
| Widgets | Extension | iOS home screen widgets for content recommendations and streaks |
Each customer app activates only the modules it needs. A meditation app might use Home, Explore, Library, Player, and Timer. A hardware wellness app might use Home, Biometrics, Tuya, and Timer.
Technical Structure
Under the hood, Bricks organizes these product modules into 13 Swift packages under Bricks/modules/. Most content modules (Home, Explore, Search, Library, Journeys, Events, Activity, Meals) share enough infrastructure that they live inside the Core and Client packages. Modules that are fully independent (Timer, Biometrics, Community, Tuya) have their own packages and are injected at runtime.
For the full technical architecture, see the Architecture Overview.
How Modules Are Activated
Customers control which modules appear in their app through two mechanisms:
Tab selection. The customer app declares which tabs to show by implementing makeTabItems():
// A content-focused meditation app
func makeTabItems() -> [TabItem] {
[.home, .explore, .library, .journeys, .profile]
}
// A hardware wellness app (using Showcase v2)
func makeTabItems() -> [TabItem] {
[.showcase, .biometrics, .profile]
}
// An app using the newest home screen (Slices v3)
func makeTabItems() -> [TabItem] {
[.slices, .explore, .library, .profile]
}Runtime module injection. Modules with their own Swift packages (Timer, Biometrics, Community, Tuya) are instantiated in SceneDelegate and injected into AppCoordinator. Modules the customer doesn't need are simply omitted.
Feature flags via Firebase Remote Config provide additional granular control within active modules.
For the full technical details on configuration injection, design tokens, coordinator wiring, and module interfaces, see the Architecture Overview.