I plan our routes with RV Trip Wizard but I use a Garmin RV890 on travel days. Most of the time, they don't differ in routes - occasionally but both should give you routing for your size/weight Momentum and truck. Both allow you to enter your specifics (weight, height etc.). The only caution I would make is that they don't take into account route modifications due to construction, accidents, etc. I tried Google Maps once on a re-route and came up to a bridge with about two inches clearance - last time I'll do that.
RVTW gives you locations of fuel stops - both truck and local gas stations. I always verify in earth view on say google maps before I pull into a local gas station.
If you use diesel, I would suggest the TSD Open Roads card as it allows you to fuel up in the truck lanes - no height problems there.
There are other options that folks prefer. Scroll a few pages back or search RVTW in this sub-forum and you will see some good threads with multiple apps.