That is so far from the truth that it's unbelievable. Inferno has the same surface API as React – the public endpoints. Everything under the hood is different though and it's different for many good reasons which I'll cover in a blog post in the coming weeks for the official 1.0 release of Inferno (and its website).

If there's nothing wrong with your app and you're using React – keep using it. If you are experiencing performance issues on mobile, maybe Inferno is an option with its compatibility layer until future versions of React can fix your issues.

Note: I'm the author of Inferno