Most spaced-repetition apps split reading notes and review cards across two tables and require a 'convert to flashcard' step. FreedWise collapses them: every highlight carries its full FSRS state as columns, a single transaction grades a card and appends to the review log, and fallback scheduling ensures algorithm failures never block a review session.
Most reading apps run separate code paths for EPUB and PDF. FreedWise routes both formats through a single WebView backed by versioned vendor assets on the filesystem. The hard parts: a readiness handshake before sending highlight data, Android tap overlays that break when the viewport zooms, and enforcing an offline-only guarantee at the Content Security Policy level.
EvidenceLens unifies 20+ fragmented medical literature sources into a single hybrid-ranked interface, surfaces author conflict-of-interest badges from public CMS Open Payments data, and runs answer synthesis entirely on the user's own inference key — zero recurring backend cost.
An end-to-end flight delay prediction platform spanning medallion lakehouse, calibrated LightGBM with SHAP explanations, Spark Structured Streaming, dbt reliability marts, FastAPI serving, and a SvelteKit dashboard — built entirely on public BTS/NOAA/OpenSky data, self-hostable for $0/year, with a contract module that enforces leakage prevention across every pipeline stage.
FreedWise collapses reading and spaced-repetition review into one offline-first mobile app. You highlight, FSRS schedules it. No account, no sync server, no network — the whole system lives in SQLite on your device. The hardest part was building a single WebView reader that handles both EPUB and PDF across 17 iterations of vendor asset versioning.
