An independent software studio

Quiet, careful software
for the things you keep.

Custavia builds small, sharp, private-by-default apps — made slowly, shipped deliberately. Three of them are about to launch.

Meet the apps About the studio

Launching soon

Three apps. Three jobs, done properly.

No bundles, no bloat. Each one exists because we wanted it ourselves and nothing else felt right.

01 · Documents

Foldyni

Your documents, calmly handled.

A private, encrypted drawer for the paperwork that actually matters — passports, insurance, IDs, health records. Scan with your phone, unlock with a glance, share through links that expire, and let Foldyni keep watch on renewal dates so you don't have to.

  • Encrypted by default. Every file sealed with its own key; nothing to configure, ever.
  • Scan anything. Auto-crop, straighten and read text right on the device — and personal details are redacted on your phone before anything reaches our servers.
  • Share Packs. Expiring, revocable links with QR codes — and you can see when they're opened.
  • Family Vault. One household, up to five people, each with the right level of access.
  • Renewals Inbox. A nudge before the passport, licence or policy lapses — not after.
  • A full PDF toolbox. Merge, split, compress, redact, watermark and sign without leaving the app.
Closed beta · launching soon
  • iOS
  • Android

02 · Your YouTube library

Crate

A command center for a library too big for YouTube.

Crate mirrors your entire YouTube library — every playlist, every saved video — into a private, lightning-fast index that you own. Search a hundred and fifty thousand videos in milliseconds, then rebuild your collections the way you always wished YouTube would let you.

  • Search everything at once. Full-text search across all your playlists, with facets for channel, tag and watch-state.
  • Virtual playlists. Sort, slice and save views freely — without touching the originals.
  • Duplicate detection. One entry per video, with every playlist it lives in.
  • Rot detection. Quietly flags what has gone private, deleted or blocked.
  • Your own layer. Tags, notes and watch-states that belong to you, not the algorithm.
  • Read-only by principle. Crate never writes to your YouTube account unless you explicitly ask it to.
Beta · launching soon
  • Web
  • iOS
  • Android · soon

03 · Remote input

HSBTK

Your phone is the keyboard now.

HSBTK turns the phone in your pocket into a real wireless keyboard and trackpad. On Android it's genuine Bluetooth — the computer simply sees a keyboard, with nothing to install on the other side. Search Spotlight from the sofa, type a URL across the room, drive a terminal from your palm.

  • A real Bluetooth keyboard. Native HID on Android — the host needs no software, no drivers, no account.
  • Swipe typing, 50–60 wpm. Glide with the keyboard you already use; HSBTK relays it key-perfect.
  • True modifier chords. Hold ⌘, tap Tab — it behaves like hardware, not like a remote.
  • Trackpad mode. Two-finger scroll, pinch to zoom, right-click — your thumb becomes the mouse.
  • The full layout. Symbols, F1–F12 and media keys included.
  • Companions for iPhone. Featherweight macOS and Windows helpers pair over Wi-Fi — the Windows one is the newest of the family.
Beta · launching soon
  • Android
  • iOS
  • macOS
  • Windows · early

The studio

Named for the keeper.

Custavia comes from custos — Latin for keeper, guardian, custodian. It isn't just a name; it's the job description. Everything we ship is built to hold something of yours, carefully.

Private by default

Encryption you never have to configure. Processing that stays on your device wherever it can. No analytics empire behind the curtain. Your data behaves like it's yours — because it is.

Small & sharp

Each app does one job, properly. We'd rather make a tool that feels obvious after a week than a platform that demands a tutorial.

Honestly engineered

We'd rather tell you exactly how something works than impress you with promises. Where there's a trade-off, you'll find it written down in the open — not in the fine print.

Be first in line.

The apps are in their final stretch. Write to us and we'll send you a single email when each one ships — no list, no spam, no follow-ups.

hello@custavia.com