I've used nothing but BlackVue on my cars. Having the dual forward/backward camera is a big deal. At 1080 I can record for hundreds of street miles before it wraps.
The app is not bad so much as primitive and clunky, it works fine. Not sure who said what but I do think the windows version is much better than the phone version. To be honest I only use the app if I want to save something off to HDD/Cloud, I normally let the feed just wrap and overwrite. If you want videos of your fun/excursions/adventures maybe a go-pro would be better?
If I had it to do over I'd get one with 4 cameras. I had something hit me in a parking lot and the shock sensor activated the camera, found the big dent in the side of my truck but the video is inconclusive as to which car in the parking lot hit me since it was on the side, in the two minutes after the activation there were about a dozen cars seen driving past, one was the culprit.