Gauges or ScanGauge II or OBDII Wi-Fi or Bluetooth Readers?

I can't address if ultragauge will display your trans temp, just want to point out the night-and-day difference in the display readability. If you're young with good eyes, it makes no difference. With aging eyes, the difference can literally be between easily reading the ultragauge display and not being able to read the scangauge at all.