Hey! Really great question. My plan is to charge a ~$2 a month subscription if you'd like to analyze more than the last 6 months’ worth of your data (I'll also allow a one-time lifetime license option!).
And I can let you use it on this 6-month window for free because it costs me nothing per user! Your own device does all the processing :D
And I can let you use it on this 6-month window for free because it costs me nothing per user! Your own device does all the processing :D