It's safe to download the app. UNOONE S.r.l. is the developer of OTTO which can be found in the Productivity category. On Google Play, the tool has been rated 3.1 by its users.
The most recent update was on Oct 23, 2020 and this application was downloaded and set up by over 100 users. Get the setup package of OTTO 4.3 that is absolutely free of charge and check out users' reviews on Droid Informer. The app can be launched flawlessly on Android 5.0 and higher.