I’ve clearly categorised each app, so its easier for you to choose. Let's start!
Sunrise calendar for iOS and Android is the best and the slickest calendar app I’ve found on the either app stores. This app is just beyond any normal calendar - it includes an amazing interface with easy to make events, automatic suggestion, and even an integration with Google Maps to provide directions. Moreover, the app syncs not only with Google Calendars, but iCloud, Yahoo, as well as Facebook, to remind you of your planned work, and your friends’ birthdays! Get: iOS, Android
MyScript Calculator, hands down, is one of the easiest calculators to use for solving complicated step by step problems. The design if the app is great, but the most important feature here is the ability to write more than just the limited number of keys any normal calculator would provide. Functions include taking power of a large number, doing a factorial, using brackets and a lot more. Must have. Get: iOS, Android
I personally prefer Wunderlist over all the other great to-do list apps. Syncs with multiple devices and has an option to share lists with other Wunderlist users. Each task can have subtasks or assigned to-do’s. You can also set due dates and reminders for completion of your work. Great! Get: iOS, Android
Evernote wins this category. Unmatched cross platform support, quick syncing and a responsive interface are the plus points for the app. You can organise your thoughts in notebooks, and make a notebook for every subject. You can also easily attach images, links and even send a full webpage to your Evernote simply by mailing the link. Amazing app to use for daily note taking, or for organising your thoughts. Get: iOS, Android
Connections in productivity... weird right? This section is for the one and only IFTTT. Extremely innovative app and idea. IF This Then That. Like, you want every image you upload to Instagram on your dropbox. Create a recipe on IFTTT and it will automagically do it for you every single time. There is more, like, you want to send a message whenever you reach a location. IFTTT connects your location data to your messages/email and automatically sends the message. Truly amazing. Moreover, its free. Nothing currently on the app stores can compare to this app. Get: iOS, Android
The oldest way to communicate using the internet is now redefining itself. And this is being done by Inbox (by Google). This app and formula is still under testing and will require an invitation to get into, and that’s available on the Inbox website. What Inbox does is that it picks up all your (Gmail) email, organises it into sections, and displays it in a beautiful ‘material design’ app. Its the fastest and easiest mail app to use on a phone. Get: iOS, Android
If you've been using some productivity apps you would like to share, please do so in the comments. Keep sharing!
(All pictures used in this post are from the iTunes App Store.)