Google play store hosts more than a million software for all Android devices but you don’t have to go through all of them to find the best apps for galaxy S5 and HTC One M8 phone. Just refer the below list:
This app comes bundled with 29 useful tools. It helps user to clean unnecessary files (cache, temporary internet files, logs) from your phones storage or the SD card. All in One toolbox can function as an APK installer and remover. It can Unzip and compress files and folders to reduce its size. For privacy, this app allows users to lock APK files. It has a flashlight, bar code, QR scanner and a compass utility.
VSCO CAM: To make full use of the powerful camera of your HTC One M8 or Samsung Galaxy S5 phone, install VSCO Camera app on your device. It has features that you’ll simply love.
TimeHop:It gives you an easy access to your old pictures from your social network accounts, phone and the tablet. Timehop supports connectivity with online networks like foursquare, Facebook, twitter and instagram.
This cool app can save any video, post or any other web-page so that you can go through or watch it later. The collected links are organized and they can be shared on any social networks. Pocket allows users to work offline.
WhatsApp: This is one of the best apps for HTC One M8 & Galaxy S5 phone in 2014. WhatsApp connects you with your friend and it allows you to share videos, images, voice and text messages without any costs.
FlipBoard: This free magazine app for Android allows you to read stories, watch videos and photos that are shared by your friends on social networks. It can fetch updates from top online newspapers and magazines.
Start: This app integrates with your HTC one M8 or Samsung Galaxy S5 phone in such a way that it allows user to make calls, send email or a text message without unlocking the device. Start app’s theme can be customized. It can be used to change background picture/wallpaper of your Android device.
Google Maps: To find nearby movie theaters, restaurants, malls or hospitals, make sure that you install Google Maps on your phone. This app can accurately guide you to a place you’ve never visited before.
Sunrise Calendar: This is the best calendar app for Android phones and tablets. It can connect to internet services like Asana, Evernote, Github and Tripit. Sunrise supports synchronization between several apps. It has an easy to use, clean and beautiful user interface and a home widget.
Drop Box: With this app, you can save all of your favorite videos, photos, files to Drop Box cloud storage platform. The service is free and it can store large mail attachments from your inbox to the cloud. Drop Box allows editing of document files as well.
It can be used to create free unlimited reminders, to do lists with description and notes. WunderList can be configured to remind you of any important meeting or a task.



Certainly great list of essential apps, but I fee 3 of them are most important and must have apps.
1. Whatsapp
2. Pocket
3. Dropbox