This is the home-screen version. There's nothing more to add.
On an iPhone, this only works from Safari.
You're in a different browser right now, so the "Add to Home Screen" option won't appear. Copy the link, open Safari, paste it, then follow the steps below.
strongestpoint.com/app/
Strongest Point isn't in the App Store or Play Store yet — you install it straight from the browser instead. It takes under a minute and it works exactly like any other app on your home screen: full screen, its own icon, no browser bar.
iPhone / iPad
In Safari
Open Safari (this only works in Safari, not Chrome) and go to strongestpoint.com/app/
Tap the Share icon at the bottom of the screen (the square with an arrow pointing up)
Scroll down the share menu and tap Add to Home Screen. Not in the list? You're probably in a browser inside another app (Messages, Mail, Facebook) or a Private tab: tap the Safari compass icon in the bottom right to open the real Safari, then try again
Tap Add in the top-right corner
Android
In Chrome
Open Chrome and go to strongestpoint.com/app/
Sign in, then tap Add to phone at the top: Chrome asks whether to install, and you're done
If you don't see it: tap the ⋮ menu in the top-right, then Add to Home screen or Install app
Confirm, and the icon lands on your home screen like any other app
Your data stays put either way.
Everything is saved to your account the moment you enter it — installing the icon just gives you a faster way back in. If you'd rather keep using it in the browser, that works exactly the same.