TG Pro 2.5.1 Keep your Mac cool. Control fan speeds, monitor temperatures and find faulty sensors. http://www.tunabellysoftware.com/tgpro/ $15 vs. Temperature Gauge By Tunabelly Software (via app store) https://itunes.apple.com/us/app/temperature-gauge/id467830521?mt=12 $4.99 Wondering what the differences are between the two apps. If you use one of the two or both can you chime in how you like it? I'm looking for something which will keep a graph log (trends).