According to the antivirus report, the app is safe and secure. Орфография is developed by Koliuzhnov Viacheslav and its category is Educational. The tool has been downloaded and installed by over 5M users and its most recent release is dated May 21, 2017.
The overall score for this application is 4.4 on Google Play. There are ads in the app. It's free of charge to get the .apk setup package of Орфография and you can read users' reviews on Droid Informer. This application installation package requires 3 MB of free space to work fine on Android 2.3 and above.