How to Monetize a Calculator application?

If you dont have a Top10 calculator application in the Google Play service, you have very hard to monetize successfully your application. But have a simple solution with the Appbrain's AppLift SDK.

There are a few simple steps

1. Create an AppBrain developer account to get access to the AppBrain developer dashboard, and register your app for the SDK there.
2. Download the AppBrain SDK from our AppBrain AppLift GitHub project page.
3. Integrate the SDK in your app and publish it to the Android Market.

Changes to AndroidManifest.xml

Just need 2 simple persmission to use the SDK: 

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

Into the <application> part :

<!-- AppBrain SDK -->
<activity android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" 
    android:name="com.appbrain.AppBrainActivity" />
<service android:name="com.appbrain.AppBrainService" />        
<receiver android:exported="true" android:name="com.appbrain.ReferrerReceiver" >
    <intent-filter>
        <action android:name="com.android.vending.INSTALL_REFERRER" />
    </intent-filter>
</receiver>

 To initalize the SDK need 1 line into the onCreate() this: AppBrain.initApp(this); 
and need an import.

In bigger part of code:

import com.appbrain.AppBrain;

public class ExampleApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        AppBrain.initApp(this);
    }
}

After that need 4 line to use the sdk interstitial ad:

@Override
public void onBackPressed() {
    AppBrain.getAds().maybeShowInterstitial(this);
    finish();
}

If you ready with all modification and you will publish your app in app stores and somebody will exit your app, every 3 day get an ad, when exiting your app. This ad type is not too disturbing for the users. I think.