The Office software for Android OS will come in handy if you want to view or edit any document or other file, and you have only a tablet or smartphone.
Documents Scanner: Textfee 3.1.3
Android 4.0.3 and higher English 29.2 MB (APK-installer in SFX, without dictionaries)Free application to scan documents using the Android-based devices.
Reader: EBookDroid 2.6.0
Android 4.4 and higher English/Russian 12.4 MB (APK-installer in SFX)Universal free e-book reader for Android.