I haven't encountered this issue; I've tested it on my Pixel 7, Pixel 3XL, and iPhone, and everything is working seamlessly without any battery drain in the morning. If you're located in the USA or Canada, it might be an external issue unrelated to the VPN itself. This could involve features like Android's Cell/Wi-Fi auto-switching, combined data usage, or Mac address masking. Your router settings, DNS, and TLS configurations might also be misconfigured.
I've posted about it on their GitHub, and it doesn't seem to be a known issue. I referred them to this post for further investigation, as it doesn't appear to be a widespread problem at the moment.
In my experience, the VPN works perfectly with Android, iOS, and Mac. I've used it for downloading, streaming, and haven't experienced any disconnections. In fact, I find it superior to Surfshark.
Regarding the Pixel 6a, I haven't had any problems. Both of my parents' Pixel 7 Pros have been running it continuously for over a week without any negative effects on their devices.
If you're experiencing VPN disconnections, consider factors like sleep settings, Wi-Fi issues, or potential hardware problems with the 6a. Before assuming it's a service issue, it's essential to thoroughly troubleshoot.
As of October 2023, I find Adguard DNS superior to NextDNS and ControlD (I subscribe to all three). If you're struggling to bind Adguard DNS to your Android device, it's likely a user issue. I've found it to be the easiest DNS to add without using their app, and if you're having difficulty, it may be due to a lack of understanding of the setup process - read the steps, its easy.
For the price of the DNS alone, coupled with a free VPN, it offers the best value among any DNS system. Recommending more expensive and inferior DNS systems is a disservice to the community, based on my extensive testing. I suggest testing the free DNS with 300,000 entries first to form your own opinion. Don't rely on advice from someone who can't add the DNS to an Android device and believes the only way to do so is through the app – this is a false statement.
Comparatively, NextDNS seems to have been abandoned in 2023, with numerous routing speed and service issues. ControlD is the slowest and most unreliable DNS service I've used, with widespread speed complaints on their Reddit similar to NextDNS. Additionally, the cost of Adguard is significantly lower than both NextDNS and ControlD.