Reminder: By November 1, 2021, all updates to existing apps must use Billing Library version 3 or newer. Learn more.

Interim UX guidelines for alternative in-app billing systems

Overview

In order to maintain a consistent user experience and to help users make an informed choice, you are required to display an information screen and a separate billing choice screen if you offer an alternative in-app billing system to Google Play’s. The information screen only needs to be shown to each user the first time the user initiates a purchase, while the billing choice screen should be shown before every purchase. The user-facing messages and UI specifications for both screens should be implemented according to the following guidelines.

Information for users

The information screen helps users understand the context of the change and gives more information to help them make an informed choice.

When to display

The information screen should be shown to users at the start of their first purchase after you add an alternative in-app billing system. This message does not need to be displayed on subsequent purchases by the same user. Display the information screen immediately after a user has taken explicit action to initiate a purchase.

When to display price

The purchase price should be visible and obvious to users before they are shown either the information screen or the billing choice screen.

How to display

The information screen should be displayed in a modal bottom sheet. A modal bottom sheet is similar to a modal dialog that animates up from the bottom of the screen and stays pinned to the bottom. It is elevated above all UI elements on the underlying screen. The underlying screen is obscured behind a dark scrim to indicate that it will not respond to user interaction.

Refer to Google Material Design for more information on the design and implementation of modal bottom sheets.

User actions

The bottom sheet should be triggered when a user taps on a button or other UI element in your app that initiates a purchase. The user can take three possible actions from the information screen:

Continue

Tapping the “Continue” button dismisses the information screen and launches the billing choice screen.

Learn more

Tapping the “Learn more” button launches a Google Help Center article in a web browser.

Dismiss

If users want to dismiss the bottom sheet and return to the underlying screen, they can dismiss the bottom sheet by:

  • Tapping outside of the bottom sheet container
  • Tapping the Android system "Back" button

The information screen does not need to be displayed again after it has been dismissed or after the user has tapped “Continue”.

Example: The purchase price is clearly displayed before the user initiates the purchase. Tapping the “join now” button triggers the information screen.

user information screen

Design specifications

The information screen is divided into three components: title, message, and buttons. All three components are required and must contain the exact text and UI elements defined in these guidelines. Do not include any additional text or imagery on this screen, but you are free to include additional text and imagery on other screens.

checkout options screen showing position of required components

  1. Title
  2. Message
  3. Buttons
  4. Bottom sheet
  5. Background scrim

Title

Text Changes to your checkout options
Font Roboto (apply to all fonts)
Font size 18sp
Font color #202124

Message

Text 1 You now have more options at checkout, due to recent regulatory changes in South Korea. Your choice will determine:
  • Who secures your purchase, processes your payment, and stores any payment information
  • Who provides customer support for the purchase
  • Which forms of payment you can use
  • Which benefits are available with your purchase
Font size 14sp
Line height 20
Font color #5F6368
Text 2 Only purchases through Google Play are secured by Google. Play features such as Play gift cards, Play Points, purchase controls, and subscription management are only available when you choose Google Play at checkout.
Font size 12sp
Line height 16
Font color #5F6368

Button 1

Text Learn more
Text alignment Centered
Font size 14sp
Font weight Medium
Font color #01875F
Background color #FFFFFF
Dimensions Height:36, Width: scale to container
Corner radius 4dp
Outline 1dp, #DADCE0
Link Links to Google Play help article

Button 2

Text Continue
Text alignment Centered
Font size 14sp
Font weight Medium
Font color #FFFFFF
Background color #01875F
Dimensions Height:36, Width: scale to container
Corner radius 4dp
Link Links to Billing choice screen

Bottom sheet

Dimensions Height: variable, Width: 100%
Corner radius 8dp, 8dp, 0, 0
Background #FFFFFF
Inner padding Left:24dp, Right:24dp, Top:32dp, Bottom: 24dp
Elevation 8dp

Landscape

In landscape view, the bottom sheet is wider than in portrait view, but otherwise follows the same design specifications and functionality.

checkout options screen in landscape mode

Bottom sheet Width: 500dp maximum, Inner padding: 24dp
Title Same as portrait view
Message Same as portrait view
Buttons Height:36, Width: scale to container

Billing choice screen

The billing choice screen presents users with two checkout options to complete their purchase. To help users make an informed decision, each billing service option also displays their available forms of payment. Once users make their choice, they will continue to complete their purchase through that billing service.

When to display

If the user has already seen the information screen, the billing choice screen should appear immediately after the user has taken explicit action to initiate a purchase.

How to display

The Billing choice screen should be displayed in a modal bottom sheet and follow the same specifications as the information screen.

Equal visual representation

The buttons for the additional in-app billing service and Google Play’s billing service should be represented in a fair and equal manner. This includes but is not limited to equal button sizes, text size/style, tap targets, and icon sizes. Please do not add any additional text, images, or style changes not defined in these guidelines.

Example: Tapping the “join now” button triggers the billing choice screen.

the billing choice screen with equal representation for each
          billing option

Design specifications

The billing choice screen has four distinct components: title, description, developer button, and the Google Play button. All components should be used, and should contain the exact text and UI elements defined in these guidelines. We ask you not to include any additional text or imagery on this screen, but you are free to include additional text and imagery on other screens owned by you.

Visual assets for Google Play and payment icons are available through the links provided below.

Example: In portrait view, the bottom sheet should span 100% of the total screen width.

bottom sheet showing position of required elements

  1. Title
  2. Description
  3. Developer button
  4. Google Play button
  5. Bottom sheet
  6. Background scrim

Title

Text Choose how to check out
Font Roboto (apply to all fonts)
Font size 18sp
Font color #202124

Description

Text Choose who will secure and process your payment and provide customer service. Benefits and available forms of payment may vary.
Font size 14sp
Font color #5F6368
Text Link Learn more
Link destination Link
Font size 14sp
Decoration Underline
Font color #5F6368

Developer button

ui requirements for a developer button

  1. App icon
  2. App name
  3. Payment method icons

additional options for the developer button

    Payment method icons

  1. Maximum number of payment method icons
  2. Payment method names instead of icons
  3. Scale to screen width

  4. 360dp width
  5. 480dp width

Button container

Outline 1pt, #DADCE0
Corner radius 4dp
Inner padding 16dp, 16dp, 16dp, 16dp,

App icon

Dimensions Height: 24dp, Width: variable

Title

Text {App Name}
Font size 14sp
Font color #202124

Payment methods

Dimensions 32dp X 20dp
Corner radius 2
Quantity 5 maximum, if >5 available display additional indicator
Additional indicator + more (wraps to next line on narrow screens)
Font size 12sp
Font color #5F6368

Google Play button

the google play button

  1. Icon
  2. Title
  3. Accepted payment methods
  4. Additional indicator

Button container

Outline 1pt, #DADCE0
Corner radius 4dp
Inner padding 16dp, 16dp, 16dp, 16dp,

App icon

Image asset Google Play prism
Dimensions 24dp X 24dp

Title

Text Google Play
Font size 14sp
Font color #202124

Payment methods

Image asset Link
Additional indicator +more
Font size 12sp
Font color #5F6368

Landscape

Example: In landscape view, the bottom sheet is wider than in portrait view, but otherwise follows the same design specifications and functionality.

bottom sheet in landscape mode

Bottom sheet Width: 500dp maximum, Inner padding: 24dp
Title Same as portrait view
Message Same as portrait view
Buttons Same as portrait view