The most recent release was on Apr 23, 2019 and Smart File Manager was downloaded and set up by over 1M users. The overall user rating of the app is 4.4. Ads are a part of this application.
The statistics show that the tool is popular mostly among Samsung and Asus users.
As users mention, you can find a nice clean interface, perfect performance and quite a few bugs among the pluses of Smart File Manager. From the users' point of view, there are several disadvantages, they are just too many ads and a battery drain.