900k+ downloads

Cross-Device Sync

Challenge: Users needed to sync bookmarks, notes, and workspaces across multiple devices.

Solution: Delta-based cloud sync with pluggable storage backends (Google Drive, NextCloud). Only changed data is transferred, minimizing bandwidth and sync time.

Result: Thousands of daily users syncing seamlessly across devices.

★★★★★ "The best Bible app that I've used thus far... I also love the features and the design of the application, how everything is easily accessible to me and the smooth synchronisation." — Google Play Review

900k+ downloads

Bookmarks & Highlights

Challenge: Users needed a rich annotation system: highlights in different colors, notes, and organization by topic. Traditional apps only support whole-verse highlighting.

Solution: Character-level precision for text selection, overlapping highlights with CSS/SVG layers, label system for categorization, and StudyPad for collecting notes into documents.

Result: Flexible annotation system that scales to thousands of bookmarks with search, export, and cross-device sync.

★★★★★ "Really appreciate the app... the ability to have personalized bookmarks and make personal notes. I also like the ability to backup the bookmarks and notes." — Google Play Review

900k+ downloads

EPUB Support

Challenge: Users wanted to read EPUB books alongside Bible texts, but the existing architecture only supported specific formats.

Solution: Adapter pattern integration into the existing architecture. EPUB files appear as native objects—no changes needed to upper layers. Performance optimized via fragmentation, compression, and SQLite indexing.

Result: Seamless format support with full-text search. Same architecture now powers MySword and MyBible formats too.

★★★★★ "Being able to add my own epubs and the scripture references auto hyperlink is wonderful!" — Google Play Review

900k+ downloads

Workspaces

Challenge: Users needed to manage multiple study environments—for daily reading, deep analysis, and different contexts.

Solution: Workspaces feature: unlimited environments with their own windows, settings, and reading positions. Quick context switching with swipe gestures, drag-and-drop arrangement.

Result: Modern workspace concept for mobile Bible study. Users can customize environments for different needs.

★★★★★ "Love the app, all the features are amazing. I love that you can hide highlights in different workspaces, so hard to find that feature!" — Google Play Review

900k+ downloads

Vue.js Rendering Engine

Challenge: Complex XML data (OSIS, TEI formats) needed flexible rendering in a mobile app. Traditional solutions required heavy parsing or static template mappings.

Solution: Vue.js rendering system that transforms XML directly into Vue components dynamically. Modular architecture: each OSIS/TEI element is an independent component.

Result: Maintainable architecture that handles complex XML formats. Adding new features is straightforward—XML structure defines the UI.

★★★★★ "Hands down, my favourite! Easy, quick, no loading... great customization, a single tap to open or close other documents." — Google Play Review

New project

MIDI Recorder — Real-time BLE & USB MIDI capture

Challenge: Help improvising musicians keep every spontaneous idea on tape. Record Bluetooth and USB MIDI keyboards directly to Standard MIDI Files on Android, with accurate timing and no studio overhead.

Solution: BLE timestamp-based tick computation (not wall-clock), silence-based auto-stop, first-note smart start, pedal-triggered start/stop, metronome, and a home-screen mini view of the app on the launcher.

Result: A focused utility that plays nicely with any DAW — files stay in the user's own storage, no accounts, no cloud lock-in, and every feature is free. Read more →