whekin

• Reconciliation engine matches pending SMS drafts against XLSX statement rows with balance-chain validation and FX-tolerant amounts.
• Dependency-free XLSX parser written for the bank's exact format — no Apache POI.
• Raw SMS bodies are never stored; a pre-commit scanner keeps secrets and personal data out of the public tree.
• Own design system ("Quiet Ledger") in a separate module with screenshot tests.

• Kalman fusion of 1 Hz GPS, 100–400 Hz IMU, and barometer — with honest ± uncertainty on every result.
• The same Rust crate runs on-device via UniFFI and server-side in a Go worker, so live and canonical results never diverge.
• Raw sensor recordings are immutable and kept forever; results are recomputed when the algorithm improves.
• Offline-first recorder with crash recovery and raw + processed GPX export to Strava.

on the drawing board

• Direction-aware start and finish gates — a run counts only when you cross the gate in the segment's direction, with crossing time interpolated between GPS fixes.
• Leaderboards that reset when a trail physically changes, with old boards archived as history — so builders can make trails funnier, not just faster.
• Combo segments: a parent segment sums its child trails and excludes the transits between them.
• Anti-cheat via raw IMU signature — forging a GPX track is easy, forging a consistent 400 Hz sensor stream is not.
• "Memories": past KOMs are preserved forever, not silently overwritten.
• Race mode and friendly betting on segment times.

• Read-aware alert inbox built on MTProto read receipts — matches coalesce into one self-editing bot message until the dialog is read.
• Notification rule engine with semantic "about me" rules and Russian inflection-aware name matching.
• Fully functional without an AI key: deterministic local rules, with citation-enforced answers when AI is on.
• Private voice transcription with audio kept in memory only; per-chat opt-in and retention controls throughout.

• Bot rebuilt around a tool-calling agent that also serves private DMs and schedules household notifications.
• Settlement engine handles USD rent at cycle FX rates, per-period payment status, and atomic utility confirmations.
• Mini app rewritten in React 19 with Tailwind v4 and TanStack Query.

• Live arrivals are gated by real vehicle evidence to filter out suspicious ETAs.
• Android home-screen widget with a departure countdown and animated live bus markers on the map.
• Ships over-the-air via Expo updates.

• Bilingual RU/EN polls with per-day lift locations and times, managed from an admin flow.
• aiogram 3 with async SQLAlchemy and Alembic migrations, deployed on Coolify.