I agree completely with Rallyroo - decide what application you'll use and then find the operating system that supports it best and then look for the tablet that works with that OS. For instance you might decide you prefer AlpineQuest. In that case you'll need an Android tablet. On the other hand you might prefer PocketEarth. In that case you'll need an iOS tablet (iPad). Even with applications that support both operating systems, like GaiaGPS, some folks have found those provide better functionality on iOS or Android. It probably sounds like a PIA to do this before getting a tablet and hitting the two-tracks, but it might serve you better in the long run.You may want to test out couple of your friends tablets to figure out which app you like. Then decide which platform to go with: Android based tablet or Apple iPad. Some apps are only built for one platform.
You're going to want a full size tablet such as an iPad 10" or larger for the screen real estate. At that point you can decide whether to buy one that has a SIM card slot that includes onboard GPS (I recommend this) or get a WiFi-only and use a GPS dongle on the Lightning port (kinda kludgy, but doable with a splitter cable and some creative wiring to put the GPS receiver in a spot with a clear view of the sky).Thank you to those who offered their help. What I am looking for is a tablet for on road use. I do not have a plan that has a lot of data so I do not want a cellular GPS and can’t use wifi. I am looking for a tablet so I can expand and shrink maps to look at roads and routes and be large enough for my old eyes to see while driving. Any help would be appreciated
Phil makes a very good point. Different packages are better at different things. Also you'll find that different places have their own 'pet' mapping application. That's the advantage a tablet has over say a Garmin, you can load and run more than one application. For example I really like Gaia for recording tracks, but find Pocket Map Pro better for acting like a digital map book. Also Pocket Map Pro is a one-time purchase whereas Gaia is a subscription for the more advanced features.I went with Apple because it was the only screen I could see well while wearing my sunglasses.
AS for software, I think it depends on your needs. I run several mapping software apps because each offers something a little different.
I'll second Scotty's advice about getting the latest release you can afford. Older models are often available for significant savings, but if you like to keep your hardware for many years you could find your physically fine older model out of OS support and then when your apps update features for newer OS versions, out of app support as well.The biggest thing is to get the newest (latest release) one you can afford for obvious reasons like screen resolution and improved battery life.