ADHEAR is MED-EL’s revolutionary new bone conduction system. What’s different about it? There is no implant involved and instead, it simply sticks onto your skin behind the ear. ADHEAR—Stick. Click. Hear.
I don’t like to recommend phones to people because everyone has different standards. With that being said I have a Kyocera. They are built tough for people who work construction. I don’t work construction but I am tough on phones, I dropped it from my pocket into about two foot of water in which it rested for about five minute before I figured out how to retrieve it and it still worked fine. The reason that I recommend you checking out this phone is that it seems to have more volume than other phones that I have had in the past. I don’t use any assistive devices with the phone. I just hold it near the Rondo 2 processor and I have to turn the phone volume down to half volume. Stands to reason that they may have a little more volume being build for construction workers in a noisy environments. What ever phone that you are interested it get them to demo it at the store so that you can see first hand how the clarity works for you.
I don't have experience with the Roger, yet at least. But, from a phone perspective, if you're partial to Android you can't go wrong with pretty much any Samsung device; they're just about the standard (and they've gotten vastly better about putting out regular updates the past couple of years). My wife and I both have the Galaxy S10+. If not Samsung, I'd recommend a Pixel 3A/4 (the 4A will be coming out soon, and the 5 in the fall more than likely).
EDIT - the Pixel 3A is on sale right now $120 off direct from Google as it turns out.