most successful apps ever You must have these apps 2018-2019

list of most downloaded, most successful apps 2016, top 10 most successful apps, top successful apps, top 10 successful apps, most successful apps in the world, .successful apps 2016, most successful apps of all time  Android applications. 

let's talk about free applications with one billion or more downloads. In this category, this app is owned by Google, Facebook. 

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1 ) Google play services.

Google play service is most used app. It is used to update apps and apps from google play. It speeds up offline searches, provides more immersive maps and improves the gaming experience.

2) Gmail

Gmail is easy to use email app that saves you time and keeps your messages safe. Less spam Gmail blocks spam before it hits your inbox to keep your account safe and clutter-free. It has 4.3 rating with 41,87,442 user till date. 

3)Maps

It is an official app you can rely on for real-time GPS navigation, traffic, transit, and details about millions of places, such as reviews and popular times. Its rating is 4.3 with 85,52,882 user till date.

4 ) YouTube 

It is in the category of video play editor. It has 4.3 rating having 2,19,32,979 users. Get the official YouTube app for Android phones and tablets. See what the world is watching -- from the hottest music videos to what’s trending in gaming, entertainment, news, and more. Subscribe to channels you love, share with friends, and watch on any device.

5 ) Facebook

It is in the category of social. Having 4.3 rating with 7,28,58,088 users. Keeping up with friends is faster and easier than ever. Share updates and photos, engage with friends and Pages and stay connected to communities important to you.

6)Google 

It is in the category of tool. It is having rating 4.4 using 67,97,211 users.The Google app keeps you in the know about the things that you care about. Find quick answers, explore your interests and get a feed of updates on what matters to you. The more you use the Google app, the better it gets.

7) Google+

It is a social app with 4.2 rating and 42,13,515 user.Explore your interests

Join Communities of people around any topic. Group things you love into Collections. Build a home stream filled with amazing content

8) WhatsApp Messenger 

It is a community app With 4.4 rating with 6,10,69,141 user.WhatsApp Messenger is an FREE messaging app available for Android and other smartphones. WhatsApp uses your phone's Internet connection (4G/3G/2G/EDGE or Wi-Fi, as available) to let you message and call friends and family. Switch from SMS to WhatsApp to send and receive messages, calls, photos, videos, documents, and Voice Messages. 

9) Google Text-to-speech 

It has 4.3 rating with 41,87,441 users. Google Play Books to 'Read Aloud' your favorite book. 

Google Translate to speak translations aloud so that you can hear the pronunciation of a word.TalkBack and accessibility applications for spoken feedback across your device 

10) Messenger

Its developer is Facebook in the category social. Having rating 4.0 with 5,00,19,930 users.You can use names or phone numbers to find friends. Use everywhere. Messenger works across all mobile and desktop devices. You can even connect with people internationally!