You have a mobile app for both platforms iOS and Android, each platform has different download URL. But your user doesn’t know which platform he using. Clicking wrong URL will lead to user bounce-rate.
Solution is making only 1 URL to download your app, which can redirect to right place depends on using platform. So how we achieve this ??
The key of problem is detecting user platform, which can be done by extracting the User-Agent header from http request.
This is how I implement using Caddy web server, you can do same thing in Apache or NGINX
Then we get cool and easy to remember link, right ?