I have recently uninstalled Economist. According to Settings -> Apps, it was taking up ca. 530Mb in data (from the internal memory). After uninstalling, I did not get that space freed.
Is there any way to reclaim that space, without installing any utility app? I have seen Clean Master is mentioned a few times. I am not certain who of those mentioning it actually tried it, successfully; and it seems to be quite annoying.
I cannot root the phone.
Related, but not providing an answer:
Why my phone is always out of space recently, but I didn't install any new software (I tried
su -c "du /data" | sort -n
but my shell doesn't have
How can I reclaim space used by the defaul email client (I reinstalled The Economist, to see if Settings -> Apps reported again the same occupied space, so I could Clear Data from there; but not it shows a mere 15Mb of data).