Hey eggsfireworks! I actually haven’t used either mSpy or Spynger, so I can’t give you a direct comparison on those. What worked for us was going with Eyezy for our teens’ iPhones - I’ve been really happy with the social media monitoring (including Snapchat and Instagram), GPS tracking, and it doesn’t seem to drain battery noticeably. Have you looked into Eyezy at all, or are you set on choosing between those two specific apps?