Always be on the lookout for better and smarter applications, for your smartphone, and for your computer.
However, don’t introduce more than one new app one per month. Make sure you actually start using it—or decide not to before you ‘try’ the next thing, otherwise you’ll be wasting your time.
This is an area where you cannot just follow your needs and wants. It often happens that somebody has done an app you never thought you needed, but once you get it you use it non–stop. I tend to say “There’s probably an app for that.”
I recommend that you regularly cull your apps. Only keep those you regularly use. You’re better off having a handful of apps you use every week, than having a whole collection on your mobile device, making it harder to navigate and making you less productive.