Tipping in Montenegro

Is it customary to tip a tour guide/driver in Montenegro, and if so, how much? I googled the question and found this on tippingaroundtheworld from April, 2016.

Taxis: Tipping Taxi Drivers in Montenegro is common, you should tip about 5-10% depending on the ride.

Hotels: Tipping Hotel Staff in Montenegro is common as well. You should tip your bell boy a euro a bag and maid 2-3 euros a night. If staying in cheaper budget hotels, this isn’t required.

Restaurants: Be sure to check for service charges when dining in Montenegro. If one isn’t included you can round up the bill for smaller establishments. For fancier experiences a 10% tip is expected.

Bars: Similar to restaurants, you should check for a service charge. If not then round up the bill for a tip.

Other: Tipping is becoming more common in Montenegro, but besides what we’ve mentioned you shouldn’t need to tip anywhere else!

Because tour guides are not mentioned, perhaps they should not be tipped. Or would they be considered a taxi driver?

I would also like to know the answer to this, as well. Trying to plan for our stop there in a couple of weeks!

We tipped our Tour guide in Montenegro 10% and it was much appreciated. Tip if you think it was worth it and don't pay strict attention to all the advice on tipping.