[![](http://developer.android.com/static/images/cluster-illustrations/kotlin-hero.svg)](http://developer.android.com/kotlin/adopt-for-large-teams)  

### [Build Better Apps with Kotlin](http://developer.android.com/kotlin/adopt-for-large-teams)

Kotlin helps development teams improve app quality, boost productivity, and increase developer satisfaction. Read more to see why over 60% of professional Android developers use Kotlin.  
[Adopt Kotlin](http://developer.android.com/kotlin/adopt-for-large-teams) [Try Kotlin now](http://developer.android.com/training/kotlinplayground)

*** ** * ** ***

## Why do teams adopt Kotlin?

![](http://developer.android.com/static/images/picto-icons/increased-productivity.svg)  

### Increased productivity

With less boilerplate code to maintain, Kotlin allows developers to focus on expressing ideas.  
![](http://developer.android.com/static/images/picto-icons/app-quality.svg)  

### Better app quality

Among the top 1,000 apps on Google Play, those that use Kotlin have 20% fewer crashes.  
![](http://developer.android.com/static/images/picto-icons/happy-developers.svg)  

### Happier developers

Android developers report being happier with Kotlin. Satisfaction using Kotlin is 25 points higher than it is for other languages.

### Join over 5.8 million developers

Kotlin is already used by over 60% of professional Android developers, and 95% of the top 1,000 Android apps contain Kotlin code. We provide first-class support for Kotlin across our tools and resources. In fact, Android development is [Kotlin-first](https://developer.android.com/kotlin/first).

We've also embraced Kotlin at Google. Over 70 of our apps contain Kotlin code.  

### Build for quality

Kotlin helps developers avoid Null Pointer Exceptions, the [#1 cause of crashes](https://developer.android.com/topic/performance/vitals/crash#prevent-crashes-null-pointer) on Google Play. When looking at the top 1,000 apps on Google Play, it was evident apps that use Kotlin have 20% fewer crashes per user. As one example, after adopting Kotlin, the Google Home team saw a [33% decrease in Null Pointer Exception crashes](https://developer.android.com/stories/apps/google-home) over one year.

### Boost productivity

Kotlin allows developers to be more expressive and focus on shipping features instead of writing boilerplate, ultimately leading to less code to write and maintain. 67% of Android developers say Kotlin has increased their productivity.

When the [Cash App team](https://www.youtube.com/watch?v=roSp-SsBPp4) started using Kotlin, they were able to eliminate many builders, and cut down on the amount of code they needed to write. In some cases, they saved 25% of their code.  

### Reinvigorate development

Kotlin was the #4 most loved programming language in 2020 according to [Stack Overflow](https://insights.stackoverflow.com/survey/2020). This aligns with what we uncovered from surveying the Android developer community: Android developers report being happier with Kotlin, and satisfaction using Kotlin is 25 points higher than it is for other languages.

As an example, after adopting Kotlin, Duolingo's internal developer satisfaction skyrocketed by [129 NPS points](https://developer.android.com/stories/apps/duolingo-kotlin), and Kotlin was a major factor cited in responses.

## Learn how Kotlin helps teams succeed

### [Developer Stories](http://developer.android.com/kotlin/stories)

Over 95% of the top 1000 Android apps contain Kotlin code. Read more to learn about how they took their apps to the next level with Kotlin.  
[View Developer Stories](http://developer.android.com/kotlin/stories)
- [![Slack](https://developer.android.com/static/images/kotlin/apps/slack.png)](https://play.google.com/store/apps/details?id=com.Slack)
- [![Lyft](https://developer.android.com/static/images/kotlin/apps/lyft.png)](https://play.google.com/store/apps/details?id=me.lyft.android)
- [![Robinhood](https://developer.android.com/static/images/kotlin/apps/robinhood.png)](https://play.google.com/store/apps/details?id=com.robinhood.android)
- [![Evernote](https://developer.android.com/static/images/kotlin/apps/evernote.png)](https://play.google.com/store/apps/details?id=com.evernote)
- [![Square](https://developer.android.com/static/images/kotlin/apps/square.png)](https://play.google.com/store/apps/details?id=com.squareup)
- [![Deliveroo](https://developer.android.com/static/images/kotlin/apps/deliveroo.png)](https://play.google.com/store/apps/details?id=com.deliveroo.orderapp)
- [![Dropbox](https://developer.android.com/static/images/kotlin/apps/dropbox.png)](https://play.google.com/store/apps/details?id=com.dropbox.android)
- [![Instacart](https://developer.android.com/static/images/kotlin/apps/instacart.png)](https://play.google.com/store/apps/details?id=com.instacart.client)
- [![Pinterest](https://developer.android.com/static/images/kotlin/apps/pinterest.png)](https://play.google.com/store/apps/details?id=com.pinterest)
- [:basecamp:](https://play.google.com/store/apps/details?id=com.basecamp.bc3)
- [![Pocket](https://developer.android.com/static/images/kotlin/apps/pocket.png)](https://play.google.com/store/apps/details?id=com.ideashower.readitlater.pro)
- [![Reddit](https://developer.android.com/static/images/kotlin/apps/reddit.png)](https://play.google.com/store/apps/details?id=com.reddit.frontpage)
- [![Camera360](https://developer.android.com/static/images/kotlin/apps/camera360.png)](https://play.google.com/store/apps/details?id=vStudio.Android.Camera360)
- [![Trello](https://developer.android.com/static/images/kotlin/apps/trello.png)](https://play.google.com/store/apps/details?id=com.trello)
- [![Foursquare](https://developer.android.com/static/images/kotlin/apps/foursquare.png)](https://play.google.com/store/apps/details?id=com.joelapenna.foursquared)
- [![Duolingo](https://developer.android.com/static/images/kotlin/apps/duolingo.png)](https://play.google.com/store/apps/details?id=com.duolingo)
- [![Amex](https://developer.android.com/static/images/kotlin/apps/amex.png)](https://play.google.com/store/apps/details?id=com.americanexpress.android.acctsvcs.us)
- [![Expedia](https://developer.android.com/static/images/kotlin/apps/expedia.png)](https://play.google.com/store/apps/details?id=com.expedia.bookings)
- [![Netflix](https://developer.android.com/static/images/kotlin/apps/netflix.png)](https://play.google.com/store/apps/details?id=com.netflix.mediaclient)
- [![Kindle](https://developer.android.com/static/images/kotlin/apps/kindle.png)](https://play.google.com/store/apps/details?id=com.amazon.kindle)
- [![Keepsafe](https://developer.android.com/static/images/kotlin/apps/keepsafe.png)](https://play.google.com/store/apps/details?id=com.kii.safe)
- [![NYTimes](https://developer.android.com/static/images/kotlin/apps/nytimes.png)](https://play.google.com/store/apps/details?id=com.nytimes.android)
- [![Nova Launcher](https://developer.android.com/static/images/kotlin/apps/nova-launcher.png)](https://play.google.com/store/apps/details?id=com.teslacoilsw.launcher)
- [![Wordpress](https://developer.android.com/static/images/kotlin/apps/wordpress.png)](https://play.google.com/store/apps/details?id=org.wordpress.android)
- [![Simple](https://developer.android.com/static/images/kotlin/apps/simple.png)](https://play.google.com/store/apps/details?id=com.banksimple)
- [![Twitter](https://developer.android.com/static/images/kotlin/apps/twitter.png)](https://play.google.com/store/apps/details?id=com.twitter.android)
- [![Airbnb](https://developer.android.com/static/images/kotlin/apps/airbnb.png)](https://play.google.com/store/apps/details?id=com.airbnb.android)
- [![Flipboard](https://developer.android.com/static/images/kotlin/apps/flipboard.png)](https://play.google.com/store/apps/details?id=flipboard.app)
- [![Foursquare Swarm](https://developer.android.com/static/images/kotlin/apps/foursquare-swarm.png)](https://play.google.com/store/apps/details?id=com.foursquare.robin)
- [![WeChat](https://developer.android.com/static/images/kotlin/apps/wechat.png)](https://play.google.com/store/apps/details?id=com.tencent.mm)
- [![GO-JEK](https://developer.android.com/static/images/kotlin/apps/go-jek.png)](https://play.google.com/store/apps/details?id=com.gojek.app)
- [![Confluence Cloud](https://developer.android.com/static/images/kotlin/apps/confluence-cloud.png)](https://play.google.com/store/apps/details?id=com.atlassian.android.confluence.core)
- [![Zola Sales](https://developer.android.com/static/images/kotlin/apps/zola-sales.png)](https://play.google.com/store/apps/details?id=com.offgrid.electric.zola.sales)
- [![Headspace](https://developer.android.com/static/images/kotlin/apps/headspace.png)](https://play.google.com/store/apps/details?id=com.getsomeheadspace.android)
- [![Adobe Acrobat Reader](https://developer.android.com/static/images/kotlin/apps/adobe-acrobat-reader.png)](https://play.google.com/store/apps/details?id=com.adobe.reader)

### [Have your team get started with adding Kotlin into your app](http://developer.android.com/kotlin/adopt-for-large-teams)

[Adopt Kotlin](http://developer.android.com/kotlin/adopt-for-large-teams) [Try Kotlin now](http://developer.android.com/training/kotlinplayground)