Case Study: Fabulous App achieves fast, frictionless onboarding and unified multi-provider sign‑in with Firebase Authentication

Fabulous App - Customer Case Study

Fabulous, a research-based habit‑forming app incubated at Duke University’s Center for Advanced Hindsight (Android and iOS), needed a frictionless onboarding flow that required minimal maintenance. The team wanted people to be able to try the app anonymously and sign up later, support sign‑in via multiple providers (Google, Facebook, email/password) while recognizing the same user across methods, and keep all onboarding and recovery pages consistent with the app’s brand.

Fabulous implemented Firebase Authentication in one afternoon. Firebase’s anonymous login let the app create accounts on first use and defer collecting user info, while built‑in support for Google, Facebook and email/password (plus cross‑provider account linking and reminders) handled multi‑provider sign‑ins. Branded onboarding and password emails preserved the app’s personality—resulting in a fast, low‑maintenance implementation that reduced user friction and met all requirements.

Fabulous App

Amine Laadhari

Chief Technology Officer