Tasker, a thousand times Tasker.
.and then the bong hits him on the head and he falls RIGHT over the realitY

pocket
. . .If you want to see more about virtual reality visit:
http://yubira.com

I love PlanDo by these guys - https://magora-systems.com/mobile-application-developers-london/ It is totally awesome!

My favorite is WiFi Analyzer. There's a free/pay version on Play Store, and a completely FOSS version available through F-Droid. Here's a link to F-Droid, which offers ad-free, all FOSS software with no strings attached:
https://f-droid.org/
In an age where everything seems to have strings attached, I'm liking FOSS more and more. I paid for the pay version of WiFi Analyzer once, and when I found it did not transfer to my next phone..that's the last time I paid for an app.
I also like the TiVo app that lets me set my TiVo DVRs at home when I'm away. I have the DISH app as well, but it's not as polished IMO. (And you need Dish network service, of course.)
Now if the question is which one I use
most
, it's the phone app of course!

I have lots of favourite apps. Cant live without them.
First of all, I use a lot of productivity tools. I tried out almost all the apps on this list
http://www.lifehack.org/articles/featured/the-lifehack-big-list-50-top-productivity-apps-for-iphone.html
My all-time favourite is Evernote
https://evernote.com
. Probably, I am not the only one, who likes it - I have heard it is one of the most popular apps of its type. I like that I can write notes and to-do-lists and then easily access them on all my devices. Very handy!
I am also a fan of fitness apps. I run and attend gym every day, so they help me keep track of my activities. I use a basic Samsung Health app
https://shealth.samsung.com
, which came with my Galaxy S6. It has a pedometer and other useful features, it even can measure your stress level. I keep a diary, where I write down all the food I eat, exercises I do, my current weight and so on.
Not my favourite, but still very helpful to me as an amateur musician is BangTrack. I am really thankful to developers like Magora
https://magora-systems.com/mobile-application-developers-london/
, who create niche apps. Unfortunately, there are very few mobile apps for musicians in App Store, and BangTrack stands out among them.

Amazon
Gmail
Photo Grid
Cymera
InstaSize
You dodge a question like a character dodges a punch on Mortal Kombat.-IceJJFish

Musicmania

Brown-noser!

mine is IMDB app
http://www.playapk.org/imdb-movies-tv-3-3-0-103300210-apk-download/136 83

7 Little Words

Mine is Gmail Using it every day