The antivirus report shows that Aprimora EF is safe. The tool has been originally created by Positivo Tecnologia - TE and it belongs to the Educational category. This application has been downloaded and installed by over 10K users and its most recent release is dated Sep 5, 2017.
People rated the app 4.8 on Google Play. A free .apk installation package of Aprimora EF 4.0.8 is available from Droid Informer and you can have a look at users' reviews on this site. Prepare 28 MB of free space on your device for this app setup package and keep in mind that it requires Android 4.0 and above.