I have download all the apps over the last year. This has taught me to avoid a lot of them as even the apps are flaky at best, downright useless at most of the time. My go to apps are:
1. Gridserve. Never fails with the latest app. Not the cheapest, but they are everywhere.
2. Tesla. Superb charging infrastructure and pricing is great if you are travelling late/early.
3. Ionity - so there is where WeCharge is great, you can get the £5.49 subscription with WeCharge and you get plug and play with it. WeCharge is a Volkswagen wrapper to Elli so any chargers that Elli can use WeCharge can use to... and I think that includes BP Pulse, because my mum's petrol station in East Kilbride shows up with their charge point in the WeCharge app. Don't quote me on that. I've only had my ID.3 for 5 days so I won't say how effective this all is, but heading back up the road to beautiful EK this weekend so fingers crossed it is flawless
4. BP Pulse - this is only useful if you can find a free charge point close to where you do stuff. £7.60 a month for hours of free charging is great, and money off fast chargers. Their dongle/card makes charging easier too. Where I live, before I got a home charger, I had a free to use BP Pulse charger at the cinema and being that I got to the cinema once a week anyway...bonus! Cheap charging at home has negated that.
As others have said, ChargePlace Sscotland can be fantastic if you find a cheap/free point you don't mind parking and going off doing something else.