Hello Rob
I am using Lingon 3 which is the version available on the Mac store. For my needs, the developer suggested this version is appropriate. At this point, I use Lingon 3 to periodically launch safari with a link that updates my ip address with NextDNS. The possibilities are endless but that is what I am using it for. Context here
The developer is very helpful and app is stable. Have had no issues. Have been using it since Jan 2022