Seeing people carrying smartphone(s), are just normal now a days compared to past decades where colored phones were just too much to buy. Having a smartphone still put people in a dilemma. What people kept on asking are, what to be placed or installed in their smartphone? What are the best apps for games and the likes.
There are already lot of people recommending some apps to be placed in their phone. But the bottom-line is, it is still all up-to the users what they want to put in their phones. But let me still share you some guidelines on what to be installed/done in your phone.
Guide #1: Note taking. Unless you have a pretty good memory, this guideline is not meant for you. But nevertheless, Note Everything will surely do the note-takings and the reminders for you. So, that you will not forget any important details, work, and events.



Guide #3: File Explorer. In order to view files inside your phone, either on the SD card on the phone itself, you will need this file explorer. ES File Explorer will surely help you find and locate your files. So better have this file explorer before you forgot where you have put or downloaded your files.

Guide #4: Weather update. Though there were some phone who have already pre-installed weather news and updates, HD Widget will surely inform you about the weather throughout the day. Plus, its looks really cool!

Guide #5: Backup files. Well we all know that anything can go wrong, so backup all your files. Either your favorite games or your settings always backup your phone. There is an auto-sync in your phone where you can sync your contacts, messages through your email. But for everything else App Backup & Restore and Titanium Backup will surely backup your apps. (Take note: titanium requires a rooted phone.)
So that's it, these are some of my guidelines for a must installed apps in your smartphone. Antivirus is not included since, responsible web browsing is already a presumption. Just download apps in the already installed Google Play in your phone. Thanks, comment for reactions and for your other guidelines.