Windows desktop companion · real interface

A companion on the desktop.
A complete workspace when opened.

Koi and Vinyl Angel live quietly at the edge of Windows. Open the Hub when you need focus, planning, local search, music, screenshots, recent activity, weather, or desktop organization.

Windows 10/11 · x64 Offline-first 12 interface languages
Hub menu overview
KoiOfficial release
Published
Installer size
SHA-256

Release notes

Checking the official release…

Vinyl AngelOfficial release
Published
Installer size
SHA-256

Release notes

Checking the official release…

Together on desktops combined unique downloadsKoi and Vinyl Angel share one count. Downloading both in the same browser is counted only once.

I worked hard to make these companions for everyone, and they are free to use. Please do not use them for commercial purposes.

01
Inside the Hub

A few little helpers,
waiting just behind the menu.

Focus for a while, plan the day, find a file, or peek at the weather—Koi and Vinyl Angel keep each tool close by until you need it.

The real Focus timer screen
01

Focus

A clear focus timer with configurable focus, break, and long-break lengths. Start, reset, or skip a phase from one quiet screen.

The real Daily plan screen
02

Daily plan

Add a dated or repeating item, attach a time, then mark it done or remove it when the day changes.

The real local file search screen
03

Find files

Search Koi's own local index and narrow results by file type, dates, path, case, whole words, or regular expressions.

The real local music library screen
04

Music

A local music library for listening without leaving the Hub, with straightforward playback and library controls.

The real Screenshots and showcase screen
05

Screenshots and showcase

Capture all screens, one active window, or a selected region. Browse local captures, preview them, zoom, or float one as a reference.

The real Recent Activity screen
06

Recent Activity

An optional local history for returning to recent items. Filter or search it, and clear it whenever you choose.

The real Weather screen showing Tokyo conditions
07

Weather

Current conditions, the next 24 hours, and a seven-day outlook. Location lookup and weather cues remain optional.

The real Desktop cleanup screen
08

Desktop cleanup

Review desktop clutter and choose a visual layout template. Files stay on the Desktop; only their visible icon positions change.

02
Getting started

From installation to a
quiet Windows companion.

01

Install the Windows build

Choose Koi or Vinyl Angel above, download the Windows installer, and open it when the download finishes.

02

Choose the interface language

The first screen asks for a language before the companion and its services begin. Twelve interface languages are included.

03

Open only what you need

Leave the companion quietly on the desktop, or open one of the little spaces above whenever you need a hand.

03
Before you install

Made to stay close to your computer,
not to look inside your life.

A clear summary of what the companions store, when they connect, and how updates are checked.

Local by default

No ads, accounts, analytics, or telemetry. Local file search stores names and paths in a local index; file contents are not uploaded.

Clear local control

Recent activity, screenshots, playback-resume data, and diagnostic logs can be cleared. The uninstaller asks before removing local app data.

Optional connections

Weather and place lookup are optional. The public Koi no Koe feed and update manifest are checked only for the features you enable.

Verified updates

Updates are checked against the official endpoint, expected product, file size, and SHA-256 value before installation.

04
A few friendly answers

Before your new companion moves in.

The little things people usually want to know before downloading Koi or Vinyl Angel.

01What stays on my computer?

Your settings, lists, local search index, screenshots, and recent activity stay on your own Windows device. Optional weather, place lookup, channel feed, and update checks connect only when their features need them.

02What if Windows shows a security notice?

Download only from this official page and check that the filename matches the companion you chose. A reputation notice can appear for a newer free app; if anything looks different or unexpected, cancel and return here rather than continuing.

03How do updates work?

Each companion checks the official update information and verifies the expected product, size, and file fingerprint before installing a newer build.

04Where can I share feedback or ask for help?

You are welcome to comment beneath any video on the official Koi no Koe channel and tell me how the companions feel to use.

Koi no Koe

Enjoy your stay

Perhaps all I can offer you is music. We’ll do our best to make this a place where you feel at ease, and hope you carry a little hope with you through every day.