UECFI Hymnal
Digital Song Library with Chords, Lyrics & Offline Sync
Community app reliability with offline sync and worship-ready chord tools.
Context
Challenge
Printed books and scattered PDFs made worship songs hard to search, update, transpose, or use offline.
Solution
An offline-first mobile hymnal made song packs, chord viewing, transposition, favorites, and cloud updates accessible on phones.
Signal
Hymns carrying chords and lyrics, searchable on a phone instead of looked up by page number in a printed songbook
Preview
Constraints
- Keep worship song access usable after initial sync without internet.
- Support fast search, pack updates, and chord transposition on mobile.
- Protect catalog integrity through admin-controlled cloud updates.
Workflows
- Downloadable song packs and searchable library
- Chord and lyrics viewing with real-time transposition
- Favorites, recents, and offline-first song access
Features
An offline-first mobile hymnal made song packs, chord viewing, transposition, favorites, and cloud updates accessible on phones.
Song Library with Packs
Organizes songs into downloadable packs with full-text search and category browsing for quick access to any hymn.
Chord & Lyrics Viewer
Displays lyrics with chord overlays, real-time transposition controls, and section-based structure for verses, choruses, and bridges.
Offline-First Architecture
Stores songs locally in SQLite so the hymnal remains usable without internet after the initial sync.
Favorites & Recents
Keeps personal song collections and recently viewed hymns close at hand for worship preparation.
Architecture
Built with React Native through Expo and TypeScript for cross-platform mobile deployment. SQLite stores songs locally for offline-first usage, while Firebase and Firestore manage cloud catalog updates and downloadable song packs.
Outcomes
600+
Song Catalog
Hymns carrying chords and lyrics, searchable on a phone instead of looked up by page number in a printed songbook
100%
Offline Capability
Full app functionality remains available without internet connection after initial sync
50+
Members Using It
Congregation members carrying the hymnal on their own phone rather than depending on a shared physical copy
No reprints
Catalog Updates
New songs publish straight to members' phones, removing the paper, ink, and turnaround a songbook reprint costs
* UECFI is a public project name. The app is presented directly as a church community hymnal while still avoiding private operational details.
Next
ScanServe
Real-time public service flow that works across customer phones, staff screens, and TV boards.