Is it possible to transfer one app from my old phone to my new if my phone is not rooted? I have recently purchased a Galaxy S5. I would like to root it, but so far, it seems that the &quot;Towelroot&quot; approach does not work on my model (purchased in Japan from Docomo), and other options are at this point too complicated for me.
So, my old phone, an S2, is rooted, but my new phone, an S5, is not.
Cut to today when I discovered that the calorie counter app I preffered, Calorific, is no longer available, and has been replaced with a feature bloated new version that ruins everything I liked about the previous version.
I still have that previous version on my old phone, so, if possible, I'd like to move that app over to my new phone.
Of course, I've looked on this forum for solutions, but other questions I've seen so far presume either that one's phone is rooted or that one is trying to completely recreate all settings from phone to another.
I would like at this point to just move one app. Is that possible?
My previous phone has Titanium Backup Pro, if that helps.
Do you want to just install the specific version of the application you have in your old phone? If so, 

a) run an application like Titanium Backup on the rooted phone

b) backup the app

c) find the .apk in the backup folder 

d) transfer the .apk to your new phone

e) run the .apk to install the application on the new phone. I believe some phones do not do it out-of-the-box and you might have to download some kind of app (search for "apk install") to do it. Try without an app first, though.

In case you also want your data to be transferred along with the app, I'm not sure whether TiBu can do this for non-rooted phones. Someone else will be better suited to answer.