Building an Offline-First Temporary Email App on Android with Room DB

Описание и применение

Mailfo использует локальное хранение в Room SQLite, чтобы гарантировать сохранность одноразовых кодов даже при переходе приложения в фон или потере сети.

Задача

Ephemeral email data disappears when the app is backgrounded or network drops, causing failed OTP retrieval.

Результат

Mailfo delivers reliable temporary email service by persisting OTPs locally, ensuring users never lose verification codes even when the app is backgrounded or network is unstable.

Рабочий процесс

• Generate a temporary email address
• Paste address into a third‑party form
• Receive verification email/OTP via push or polling
• Persist each incoming message into Room SQLite immediately
• UI observes Room via Flow/StateFlow and displays messages
• User filters messages locally (All, Unread, Promotions, Important)
• User copies OTP and returns to browser
• User can purge all addresses with a single tap

Доказательства

Every incoming message received via push / polling is immediately persisted into a local SQLite table.

Источник

The UI observes the Room database as a single source of truth.

Источник