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Alex Rivera

2020

Fieldnote — Offline-First Survey App

An offline-first progressive web app for field researchers to collect structured survey data without connectivity.

ReactIndexedDBWorkboxTypeScript
Source (opens in a new tab)
Fieldnote survey form displayed on a mobile device with an offline indicator

The Challenge

Researchers working in areas with no signal needed to fill out multi-page surveys and trust that nothing would be lost.

The Approach

Queued every write to IndexedDB first, with a Workbox background-sync job reconciling against the server the moment connectivity returned.

The Result

Adopted by 30+ field researchers across two field seasons with zero reported data loss.