Google Play In-App Billing allows developers to sell digital goods and subscriptions from within their Android apps. It supports consumable and non-consumable purchases as well as recurring subscriptions. The payment flow is synchronous using the In-App Billing library. In-App Billing has limitations including only being available in 32 countries and taking a 30% transaction fee. Apple's In-App Purchase system similarly allows selling digital goods and subscriptions from within iOS apps, also taking a 30% cut of revenue. Both require using their native APIs and payment systems to handle in-app transactions.

1. In-app Payments by Google
& Apple
Lauri Eskor, Lauris Kruusamäe

2. Google In-App Billing

3. Components
● Google Play Publisher account
● Google Checkout Merchant account
● Managing products from developer console
● In-App billing library (version 3)
● Binding to the Play Store service

4. Consumable / Non-
consumable
● Single payment
● Managed by In-App Billing system
● Owned state
● Unowned state after consumption

5. Subscriptions
● Recurring billing
○ Monthly
○ Annual
● Optional trial period
● Non-refundable
● Http API for server access

6. Payment flow
● Synchronous in library version 3
● Ask products list
● Start payment Activity
● Handle response

7. <�img src="http://developer.
android.com/images/in-app-
billing/v3/iab_v3_checkout_flow.
png" id="figure1" height="382">
Payment flow example

8. Limitations
● Available in 32 countries
● Not available in Estonia
● 30% transaction fee
● Taxes
● Play Store payment system except for
○ Physical content / goods
○ Digital content usable outside of the application

9. AdMob
● Google's ad network
● Promote
● Monetize
● iOS
● Android
● Windows Phone

10. Admob
● Banner ads
● Interstitial ads
● Mediation SDK for multiple ad networks

11. iAd

12. iAd
- 10 countries: U.S., Canada, Mexico, Australia,
New Zealand, U.K., France, Germany, Italy,
Spain, Japan
- delivers ads based on selected categories
- possibility to ban ads with non-wanted
keywords

14. - (void)bannerViewDidLoadAd:(ADBannerView *)banner;
- (BOOL)bannerViewActionShouldBegin:(ADBannerView *)banner
willLeaveApplication:(BOOL)willLeave
- (void)bannerViewActionDidFinish:(ADBannerView *)banner
- (void)bannerView:(ADBannerView *)banner
didFailToReceiveAdWithError:(NSError *)error

16. How much do I get?
Revenue based on:
- Ad impressions (nr of times ads appear)
- Clicks (nr of times users tap on ads)
- Contract between advertiser and Apple

17. How much do I get?
Sample:
1022 loaded banners,
13 clicks
earnings: $2.10
http://www.galarina.eu/blog/2011/9/24/photometa-iad-revenues.html

18. In-App Purchase

19. In App purchase
- Sell digital goods
- 30% of revenue to Apple

20. In App Purchase
You can not
- Use another means for unlocking or enabling
additional features or functionality;
- purchase physical goods or goods and services
used outside of the application

24. [[SKProductsRequest alloc] initWithProductIdentifiers:
[NSArrayarrayWithObject:productString]];
- (void)productsRequest:(SKProductsRequest *)request
didReceiveResponse:(SKProductsResponse *)response;
- (void)paymentQueue:(SKPaymentQueue *)queue
updatedTransactions:(NSArray *)transactions;
SKPaymentTransactionStatePurchased
SKPaymentTransactionStateFailed
SKPaymentTransactionStateRestored

25. Thank you
Questions?