Bullseye

Download Bullseye

Free version: 3 watches, 30-min polling, daily digest. No card, no expiry.

Windows

Windows 10, 11. ~32 MB installer.

v0.1.0

First public release.

Download for Windows

32 MB · Windows 10/11

100% open source

Verify before you run.

Bullseye's full source code is public on GitHub under the AGPL-3.0 license — read every line, build it yourself, audit the installer. Fork it or run it however you like; the only catch is that if you host a derivative service, you have to open-source your changes too.

View source on GitHub
about that "is this safe?" warning

Yes — it's safe. Bullseye is fully open-source and you can audit every line of code, build the installer yourself from source, or verify the binary hash before you run anything. The repository is public on GitHub.

Chrome and Windows SmartScreen flag every brand-new Windows app until it builds download reputation — the warning is reputation-based, not a signal that anything is wrong with the file. Every new desktop app sees this until enough people have safely installed it. To proceed:

  1. If Chrome blocks the download, click the dropdown next to it → Keep.
  2. When SmartScreen pops up, click More info → Run anyway.
  3. The warning won't appear on future Bullseye updates after the first install.

Want to verify the binary yourself? Compare its SHA-256 hash against the value published on our GitHub releases page: 

PowerShell: Get-FileHash Bullseye-Setup.exe -Algorithm SHA256
macOS / Linux: shasum -a 256 Bullseye-Setup.exe

Or skip the binary entirely — clone the repo and build it yourself using the instructions in the README.

macOS

Coming soon — get notified.

We'll email you exactly once when the .dmg is ready. No newsletter, no spam.

Install notes

Why does Windows show a SmartScreen warning?

It's reputation-based, not a malware signal. Windows SmartScreen flags every brand-new desktop app until it accumulates download history — every new app on the platform sees this warning until it earns reputation. Click "More info" then "Run anyway" once; subsequent updates won't trigger it. If you'd rather verify before running, the source is on GitHub and you can compare the SHA-256 hash of the installer against the one published on our releases page.

What gets installed?

One folder under Program Files (or your user folder for per-user install), a Start Menu shortcut, an optional desktop shortcut, and an optional auto-start-at-login entry. No services, no registry keys outside the install registration.

Does Bullseye run in the background?

Yes — there's a system-tray icon. You can quit from the tray menu any time. The scraper polls Marketplace every 30 minutes (Free) or every 5 minutes (Pro) while it's running.

How do I uninstall?

Settings → Apps → Bullseye → Uninstall. Removes the app cleanly. Your saved watches sync to the cloud, so reinstalling brings them back.