Free. No App Store. Works on iPhone and Android. Add it to your home screen and open it like any app.
iPhone installs only work in Safari, not Chrome or Firefox.
Square with an arrow pointing up — bottom of Safari.
Scroll the share sheet — it's near the bottom.
SideQuest lands on your Home Screen. Open it from there to enable Quest Alerts.
Chrome or Edge supports one-tap install. Other browsers may not.
Three dots in the top-right of Chrome.
Or “Install app” — same thing, different label.
SideQuest installs like a regular app — push alerts on, full-screen experience.