I've been using Telegram for my cross-platform messaging and it works quite well. On OS X, it feels like a Mac app with embellishments, on Windows it feels mode

I've been using Telegram for my cross-platform messaging and it works quite well. On OS X, it feels like a Mac app with embellishments, on Windows it feels modern and clean like a Windows 10 app should, unlike most apps on Windows 10 (including Microsoft's). On iOS it behaves like an iOS app, and who knows about Android but I would guess it's the same. And yet, they also all behave the same. There's a consistency across all of the apps that makes it clear they're the exact same app, but there's also a consistency with the platform that makes them feel like native apps everywhere.