Started using Outdoors GPS with a subscription then moved to the OS app because it was too buggy.
Now moved back to the Outdoors GPS app because I missed the feature of permanent way points, and the OS road atlas style map. The not so colourful large scale map you get with the OS is crap, they’ve copied Google maps when there’s was much better!
Have to admit the OS app is way more sleek than the Outdoors GPS.
Looked at ViewRanger but I am cautious of their business model. My Dad used to use MemoryMap before smartphones and purchased quite a bit of mapping from them. But the amount of hassle he had from them trying to keep those purchased maps on various devices has meant he’s given up.
The fact that app developers have to continually maintain apps to me means a subscription model is the only sustainable way to do it. The last thing I want to do is buy something which is equivalent to a 10 year subscription only for the company to go bust in 7 and I am left without what I bought.
I am quite keen on ViewRanger though, especially since you can get Harvey Maps digitally (although the areas they generally cover I’d always want a paper backup).