Does it work on a phone?
Yes, in the phone's browser; no app store download.
Spick HQ runs in any up-to-date browser on a phone, tablet or computer. Open your company link (for example app.spickhq.com/your-company) and sign in.
To get an icon on your phone: in Safari tap Share → Add to Home Screen; in Chrome tap the menu and Add to Home screen.
You need an internet connection to use it; changes are saved straight away.