Honestly, I don't think the BlackVue are worth it. You're not missing much. Yes, the quality may be great and it looks stylish, but actual usage is terrible.
Their mobile app could use a ton of work. There have been multiple occasions when I tried to get footage off my cameras and it felt like a lot of work. Just streaming the video takes a while to start up (even in low-bandwidth mode) and you can only view them in small 1 minute chunks. I have a 1 hour commute and trying to find a specific portion of it is a pain.
To make things worse, I have to hurry and get such footage before it gets overwritten. Viewing each clip takes a while to start up and sometimes fails. Downloading a clip can take a VERY long time. In one instance, it took me 15 minutes to download a 1 minute clip even though I was connected directly to the camera (WiFi-direct, not cloud) and was literally in the driver's seat waiting. Don't even get me started on how often it randomly disconnects my phone from it, causing me to start over.
If I knew I'd have this experience, I wouldn't have paid close to $500 for it. Maybe $300 at most or $200 for a non-4K version.
Edit: To provide more details, I tested this on an iPhone 7 Plus, Google Pixel, and Essential Phone. Same experience in all.