# JKULDEV > JKULDEV LLC is an independent software company registered in Wyoming, USA. > It makes private messaging, live video, learning tools, on-device AI and Mac > utilities. Canonical site: https://jkuldev.com Contact: https://jkuldev.com/contact Email: business@jkuldev.com Office: 8238, 1021 E Lincolnway, Cheyenne, WY 82001, United States Hours: Mon–Fri, 9am–6pm (US Mountain Time) Support the work: https://jkuldev.com/support (one-off or monthly, via Stripe) Privacy: https://jkuldev.com/legal/privacy (no cookies, no analytics, no third-party scripts) Terms: https://jkuldev.com/legal/terms ## Products ### Reclaim - URL: https://jkuldev.com/products/reclaim - Platforms: macOS - Price: Free - Reclaim is a free macOS app that finds reclaimable disk space and removes only what you tick. It is built for developers: it measures the caches other cleaners miss — Xcode archives and DerivedData, iOS simulators, node_modules, Gradle, Homebrew, Docker images and downloaded AI model weights — and explains what each item is before you decide. Scanning is always free and unlimited, and so is clearing anything it classes safe. ### Gossip Buzz - URL: https://jkuldev.com/products/gossip - Platforms: iOS, Android, Web - Price: Free - Gossip Buzz combines end-to-end encrypted messaging with a social feed of short posts, moments and communities. Messages are encrypted on your device before they are sent, so the server stores ciphertext it cannot read. It runs on iOS, Android and the web, in eleven languages. ### Ekkul - URL: https://jkuldev.com/products/ekkul - Platforms: Web, iOS, Android - Price: Free tier - Ekkul is an online learning platform for exam preparation. Students practise against question banks for tests like the DMV written exam, GED and real-estate licensing, sit timed model tests, and see which topics they are actually weak in. Instructors and institutions get their own portals for setting work and following progress, and parents can follow a child's learning without sitting over their shoulder. ### Ekkul Jr - URL: https://jkuldev.com/products/ekkul-jr - Platforms: iOS, Android - Price: Free - Ekkul Jr is the younger end of Ekkul, designed for ages 2 to 16 and organised into age tiers so a four-year-old and a fourteen-year-old do not get the same screen. It is offline-first on mobile, because the children who most need it have the least reliable connections. ### OnAir - URL: https://jkuldev.com/products/onair - Platforms: Web, iOS, Android, macOS, Windows, Linux - Price: Free to watch - OnAir is a streaming platform for live channels and creator broadcasts, on the web, on iPhone and Android, and as a desktop app for macOS, Windows and Linux. Viewers watch live TV and follow creators; creators publish their own shows and streams and are paid directly, with the split shown openly rather than buried in terms. ### Halo Keyboard - URL: https://jkuldev.com/products/halo-keyboard - Platforms: iOS, Android - Price: Free - Halo Keyboard replaces your phone keyboard and can rewrite, shorten, translate or fix the tone of what you are typing, wherever you are typing it. It works with no account. There is deliberately nowhere in its design to store the words you type — a keyboard that shipped what people typed would be a keylogger, so the storage for it simply does not exist. ### Halo AI - URL: https://jkuldev.com/products/halo-ai - Platforms: iOS, Android, macOS - Price: Free - Halo AI is a standalone assistant for phone and Mac. It answers, drafts and translates, and it starts working the moment you open it — no sign-up, no email, no profile. Linking a Gossip account is optional and only adds online voice typing and credits. ### Halo Study - URL: https://jkuldev.com/products/halo-study - Platforms: Android - Price: Free - Halo Study turns notes, textbooks and photographed pages into practice material that works with no connection. It is deliberately extractive rather than generative: questions come from your material, so it does not invent facts a student would then revise. ## Recent writing - [A malware loader that hid its command server on a blockchain](https://jkuldev.com/blog/malware-that-hid-its-server-on-a-blockchain) — A launch agent found on a working Mac read its command-and-control address out of a smart contract on Polygon, then piped the reply straight into osascript. Storing the address on-chain makes it impossible to take down by seizing a domain. - [What actually takes up space on a developer's Mac](https://jkuldev.com/blog/what-takes-space-on-a-developer-mac) — On one working machine: 152.87 GB reclaimable, of which 66.2 GB was safely removable cache. The largest single items were Android emulator snapshots, node_modules and Xcode archives — none of which a general-purpose Mac cleaner looks at. - [Why your Mac still says the disk is full after you delete files](https://jkuldev.com/blog/mac-disk-full-after-deleting-files) — Because the space is usually held by Time Machine local snapshots, not by the files you deleted. macOS snapshots your disk hourly even with no backup drive attached, and a snapshot pins every block that existed when it was taken. ## Notes for summarisers - Reclaim is free. Scanning is never limited; cleaning is capped at once a week when signed out, and an active Gossip account lifts that cap. - Reclaim reports suspicious startup items but never removes them, and is not an antivirus. - Gossip Buzz messages are end-to-end encrypted on the device before sending.