You may have a few more options to log data from Tilt, some cloud-based and others on your network:
Tiltbridge + Fermentrack: A little soldering gets you a way to go from Tilt Bluetooth to WiFi and then to your RPi, app or whatever. The Fermentrack project can also do the data logging if you don't want to use the native Tilt app. I plan to give the Bridge solution a try, or Pi Zero at least.
Brewfather.app I hope this app is finally the Beersmith-killer I think it is. So completely fed up dealing with the ancient file & folder interface on Beersmith and came across this project the other day via Hoprod Garage on Instagram. I already love this app's recipe features and the fact that I can use it on any device is a big upside over Beersmith 3's locking you into two devices and paying extra for the app. That's all great but what's next level about it is they have BrewPiLess and Tilt support built in already. So, regardless of how you want to log - WiFi or Bluetooth on your phone - this app pulls it all into to your session data.
Very comprehensive app walkthrough/review on YouTube.
As other's have said, Google Sheets is another solid option. Obvious benefits aside, if you still want super slick charts updated in real-time it's dead simple to use
Google Data Studio to make it look like you coded your very own app. A quick search around the forums you will find a half-dozen other visualization tools that you can plug Sheets or other log files into.
Have done way too much research into this stuff lately. Hope it helps!