This app was mentioned in 14 comments, with an average of 2.29 upvotes
For Android, Trackthisforme and TapLog are two apps that let you put widgets for logging sneezes etc on your home screen.
There are several convenient, general purpose data logging apps for Android, including Trackthisforme, Nomie and KeepTrack.
You can import data from these apps into Zenobase, where you can combine it with data from automatic sources like Fitbit or RescueTime, do basic filtering, correlations and comparisons, and re-export the data for further analysis or visualization in e.g. R or Tableau.
This might do it:
https://play.google.com/store/apps/details?id=me.trackthisfor.android