Your notifications,
as fish.
ShellStack Aquarium is a virtual desktop overlay where your unread messages swim. Slack DMs become angelfish. Emails become goldfish. Ignore them long enough, and they grow.
One-time purchase · 2 device activations · Windows
Slack DMs → Angelfish
Every unread direct message becomes a colorful angelfish swimming in your aquarium. The more DMs pile up, the more fish appear.
Gmail → Goldfish
Unread emails swim as goldfish. Glance at your desktop to see what's waiting — no notification pings, no badge counts.
Neglected? They grow.
The longer you ignore a notification, the bigger and more restless its fish becomes. A gentle, beautiful reminder instead of a nagging badge.
How it works
Set it up once. Then just glance at your desktop.
Install the app
Download for Windows, install, and it lives as a transparent overlay that floats above your desktop.
Connect Slack & Gmail
One-click OAuth. Read-only scopes — we never see message contents, only unread counts.
Watch your inbox swim
Fish appear when messages are unread, grow as they age, and disappear when you reply.