Source link: Android SDK

Trialy makes it super easy to create a free trial for your in-app-purchases. Trialy takes care of the heavy lifting for you (using server-side checks with customizable grace periods to allow offline use, for example) so you can focus on developing an amazing app.

  • Add the library to your app using gradle
  • Grab a free API key from here

For documentation and additional information see the website.


dependencies {

compile 'io.trialy.library:trialy:1.0.5' 


Initialize the library in your main activity's onCreate() method:

  protected void onCreate(Bundle savedInstanceState) {


 //Initialize the library and check the current trial status on every launch

Trialy mTrialy = new Trialy(mContext, "YOUR_TRIALY_APP_KEY");

mTrialy.checkTrial("YOUR_TRIAL_SKU", mTrialyCallback);


Add a callback handler:

private TrialyCallback mTrialyCallback = new TrialyCallback() {


public void onResult(int status, long timeRemaining, String sku) {

 switch (status){


//The trial has just started - enable the premium features for the user



//The trial is currently running - enable the premium features for the user



//The trial has just ended - block access to the premium features



//The user hasn't requested a trial yet - no need to do anything



//The trial is over



Log.e(TAG, "Trialy response: " + Trialy.getStatusMessage(status));





To start a trial, call mTrialy.startTrial("YOUR_TRIAL_SKU", mTrialyCallback); Your app key and trial SKU can be found in your Trialy developer dashboard.

If you're using a "per Google account" trial, also add the GET_ACCOUNTS permission to your AndroidManifest.xml (and request it within your app on Android 6.0+):

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


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Easy FireBase Cloud Notification.


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