A phone app that tracks your trips and works out exactly how many days you have left under rolling visa limits like Schengen's 90/180.
Cheap room sensors plus a report generator that turns a winter of temperature and humidity data into evidence a tenant can send a landlord.
A browser extension that records what a site actually stores and sends after you click Reject, then shows you the gap.
A tiny site per recurring group that publishes the next meetup, handles cancellations properly, and exports a calendar feed people subscribe to once.
A desktop app that transcribes scanned paper notebooks with a local vision model and makes twenty years of them searchable.
A phone app that turns a self-help hunch into a randomized n-of-1 trial, using data your phone already collects.
A desktop app that records ten seconds, measures what's actually wrong with your audio, and names the one setting to change.
A site that watches municipal planning and permit portals, then emails you when something gets filed within walking distance of your address.
A browser extension that keeps a private full-text index of every page you actually read, so you can find the thing you half-remember.
A plug-in sensor that records mains outages, sags, and frequency drift in your home, so you can prove what the grid is doing to your house.
A phone app that reads pharmacy labels, resolves them to real drug identities, and prints the single medicine list every clinician asks for.
A self-hosted vault for the documents and accounts your household would need without you, released by a check-in timer and split keys.
A small web app that lets a neighbourhood share drills, ladders, and camping gear without the chat group losing track of who has what.
A browser extension that records subscriptions at the moment you sign up and warns you before the first real charge lands.
A web app that reads school newsletters, term sheets, and club schedules and turns the dates buried in them into a subscribable family calendar.
A desktop app that transcribes your voice memo folder locally and gives you full-text and meaning-based search over years of recordings.
A phone app that reads book spines off a shelf photo and builds a local, exportable catalog of everything you own.
A small home controller that delays dishwashers, dryers, and water heaters into the cheapest, lowest-carbon half-hours of the night.
A desktop app that snapshots every game save as a versioned timeline, so you can undo a bad decision hours after you made it.
A phone app that tracks cumulative sound exposure across your day and warns you before you spend your hearing budget.
A web app that reads the manuals for everything in your house and turns them into a dated maintenance calendar with the right part numbers attached.
A seatpost sensor and companion app that scores how rough every street you ride is, then draws it on a map you can act on.
A small LoRa hardware beacon and companion app that lets hiking or hunting groups share location and status pings with zero cell signal.
A web app that runs brackets and live scoring for board game and tabletop tournaments, so organizers stop tracking matchups on a whiteboard.
A browser extension that detects dark-pattern cancellation flows in real time and walks you through them step by step, so canceling a subscription never takes 20 minutes on the phone.
A mobile app that OCRs ingredient labels on-device and flags allergens against your personal list, with no network round-trip and no data leaving the phone.
A command-line tool that transcribes your subscribed podcasts locally with whisper.cpp and lets you full-text search across every episode you've ever listened to.
A mobile app that scans receipts with on-device OCR, tracks warranty expiration dates, and reminds you before coverage runs out.
An ESP32-CAM sensor that watches your mail slot or porch, classifies deliveries versus junk mail with a small vision model, and pushes a notification only when it matters.
A browser extension that logs prices on every product page you visit and alerts you when an item drops below its historical low, stored entirely locally.
A mobile app that logs symptoms alongside food, sleep, and activity, then runs simple statistics to surface likely triggers for chronic conditions like migraines or IBS.
A desktop app that watches your Downloads folder and auto-sorts, renames, and files new items using local rules plus AI classification for the ambiguous ones.
A mobile app that tracks scores across board game sessions and turns them into per-player stats, streaks, and head-to-head records for regular game groups.
A PWA that logs sets, reps, and weights offline and tells you exactly what to lift next session — no subscription, no account, no cloud required.
A drag-and-drop web tool that removes EXIF metadata from photos entirely in the browser — no uploads, no server, nothing leaves your device before the files are clean.
A browser extension that attaches your own notes to any webpage and syncs them to a server you control — no Hypothesis account, no telemetry, no vendor lock-in.
A standalone desktop app that renders a link graph from any Markdown folder, letting you explore note connections without installing Obsidian or any other wiki tool.
A mobile app that tracks recurring maintenance items — oil changes, filter replacements, appliance servicing — triggered by elapsed time, a custom counter, or both.
A cheap ESP32 and capacitive moisture sensor that logs soil conditions to a self-hosted dashboard and sends push alerts when your plants need watering.
A self-hosted web app that pulls your Steam library via API, tracks completion percentages, and sends weekly nudges about games you own but never play.
A background mobile app that continuously logs ambient decibel levels throughout the day and alerts you when cumulative noise exposure crosses hearing-safety thresholds defined by NIOSH.
A browser extension that converts prices on any shopping or subscription page into equivalent hours of work at your configured wage, making the real cost of purchases visible at a glance.
A desktop background process that watches your screenshots folder, OCRs every new image, and lets you search past screenshots by their text content — no cloud upload required.
A mobile app that transcribes voice memos with Whisper and extracts structured tasks, deadlines, and project labels — so thinking out loud during a walk turns into an organized to-do list.
A $4 ESP32 board that passively scans for your phone via Bluetooth and publishes room occupancy to a local MQTT broker — no cloud, no camera, no app.
A self-hosted feed reader that scores incoming articles by relevance using a local LLM, so the most useful items surface first instead of drowning in chronological noise.
A browser-based finance tool that imports bank CSV exports, auto-categorizes transactions, and shows spending trends — no account linking, no cloud, no subscription.
A sub-$40 ESP32 sensor kit paired with a self-hosted web dashboard to track CO2, particulates, and VOCs in your home — no cloud account required.
Snap a photo of any receipt; an AI extracts the warranty terms and reminds you before they expire.