This app was mentioned in 5 comments, with an average of 1.20 upvotes
I had the exact same issue. I didn't get Quick Remote back. I replaced with LG TV Remote and SURE Remote. I use the LG TV remote for volume control and SURE remote for turning it off/on.
I have an LG tv and a Note 4 as well. The remote app works for me. I can control the tv itself and the directv box with ir on the phone. There is also an LG remote app you can download that let's you use your phone as a smart remote. Comes with a cursor as well and that makes navigating the tv menus much easier. Your phone and tv must be connected to the same wifi signal for the LG app to work. https://play.google.com/store/apps/details?id=com.lge.tv.remoteapps&hl=en&referrer=utm_source%3Dgoogle%26utm_medium%3Dorganic%26utm_term%3Dlg+tv+remote&pcampaignid=APPU_1_Ui0MVemfBI7egwSvr4LwDg
Which TV do you have? It only works on LG TVs. And not all models at that. Anyways this is the app
In the absence of an IR blaster you could try one of the manufacturer specific apps that work over wi-fi if you have a name brand smart TV from LG, Samsung, or Panasonic... otherwise this universal app might do the trick.
One other (considerably more expensive) option if you have multiple IR only devices to control is the Anymote.
Android? Have you tried this?