Balatan is one of if not the biggest contributor in Android modding scene and mobilism for a long time (Uploaders that have purple names in mobilism are major android releasers and generally very trustworthy). if you still have doubts try checking the APK in virustotal

I honestly don’t know much about Microtik’s RouterOS but in a few occasions I had I realised it is way too complicated for home user and their OS is not FOSS and needs payed license too. I’m sure it’s great once you get the hang of it but it’s unnecessary pain when there is OpenWRT available with a lot of devices you can choose not just one specific manufacturer