CasaVargas is an independent studio in North Carolina making apps for the Mac, iPhone, iPad, Apple TV, Windows and Linux. Each app is paid for once, if it costs anything at all.
Beltr turns the songs already on your computer into karaoke on your TV, and every phone in the room becomes a remote and a mic.
OneScribe reads what you scan and turns it into organized, searchable details, with the AI running on your iPhone or iPad.
A demo edition: Linden Falls and its stories are fictional. Photos are public domain.
Deckle prints a real morning newspaper on your Kindle, Kobo, PocketBook or reMarkable, built on your own computer from your town’s news and weather and the reading you saved; makes puzzle books about what you love, clued by an AI on your own Mac, to solve in ink; and finishes the books you own like the store’s: typesetting, covers, X-Ray, comics fitted to the screen, recaps without spoilers.
Shown with a demo lineup: channels, programs and artwork are fictional. Video: Big Buck Bunny © Blender Foundation, CC BY 3.0.
Cathode TV plays your own M3U or Xtream playlist, with its XMLTV guide, on iPhone, iPad, Mac, Apple TV and Vision Pro.
Nimbus turns S3, Google Drive, OneDrive, SFTP and fifty more storage services into volumes on your Mac: browse them like Finder, show them in Finder, copy and sync between them, with rclone as the engine.
DebridDownloader runs your debrid account from the desktop and saves finished files to your disk, your media library or a cloud drive.
One more in development. They're named here because the work is real; no dates are promised until they ship.
AppPulse updates the apps on your Mac, but only when it can prove the update comes from the same developer.
A valid signature is not proof of identity, so every install ends with a Team ID match against the copy already on your Mac.
Read the AppPulse case studyEverything the studio has shipped or is building, companion apps included.
| Name | What it is | Runs on | Built with |
|---|---|---|---|
| Available now | |||
| Beltr | Karaoke from the music you already own | macOS, Windows, Linux, Docker | Python, Electron, ONNX Runtime |
| Beltr Remote | A phone as Beltr’s microphone and remote | iPhone, Android | SwiftUI, Kotlin Multiplatform |
| Beltr Client | Beltr’s lyric stage, as a TV app | Apple TV, Android TV | SwiftUI, Kotlin Multiplatform |
| OneScribe | A document scanner that reads what it scans | iPhone, iPad | SwiftUI, Foundation Models, Vision, SwiftData |
| Open source | |||
| DebridDownloader | A desktop client for debrid services | macOS, Windows, Linux | Tauri, Rust, React |
| Deckle | A morning paper for your e-reader, and better books | macOS, Windows, Linux | Tauri, Rust, React |
| Nimbus | Every cloud you use, as a volume on your Mac | macOS | Swift 6, SwiftUI, File Provider, rclone |
| In the workshop | |||
| Cathode TV | A native IPTV player for every Apple screen | iPhone, iPad, Mac, Apple TV, Vision Pro | SwiftUI, AVFoundation, SQLite |
| AppPulse | A Mac app updater that checks who made the update | macOS | Swift 6, SwiftUI, Security framework |
There are no subscriptions here, and nothing is rented back to you. You pay once, if at all, and the software is yours.
The heavy lifting happens on your own hardware. Beltr separates vocals on your computer; OneScribe reads your documents on your phone, with no server of ours involved. Apple software is written in Swift for the device it runs on, not ported to it.
And every project starts as a written specification. The thinking is done before the building begins, and the decisions are still on record when a product is five versions in.
Casa Vargas LLC is an independent software studio in North Carolina, founded in 2025. Everything on this page is made here, from the first specification to the signed installer.
The whole chain is owned in-house, end to end: design, code, release engineering, the build machines, the product sites and the support inbox.
Why Deckle exists, what goes into the paper it sets every morning, how it gives the books you load yourself what store books have, and what is still rough.
From a first commit on a Sunday in February to a karaoke app on three desktop platforms, four companion apps, two app stores and a Docker image. The turns Beltr took, and what each one taught us.
Three names, five navigation designs on Apple TV, a guide redesigned five times and a player rewritten to a third of its size. What eight months of building Cathode TV looked like.