I'm usually not a fan of the concept of app converters - those are tools that take your web app or website, and build a mobile app out of them.

And with any of them, you're going to sacrifice some design flexibility inherently.

While I wasn't able to directly try this one - Nativator - what they offer looks really decent for the price they charge.

You outsource your push notifications to a platform called OneSignal, and Nativator charges a monthly fee instead of a one-time conversion, but you get to update your app for free.

I think the website looks a little lackluster, but you get all the features you would need for a basic app on both app stores for a really good price, if you've already built your website or web app.

I'd give them a peek :)