Submitting GFoundry Custom Apps to the Apple Store and Google Play Store
The assets and information you need to prepare so that GFoundry can submit your custom app to the Apple App Store and the Google Play Store.
When GFoundry prepares a custom (white-label) app for your organisation, the stores ask for a set of assets and information. This guide lists what you need to provide.
Store requirements change over time. The values below are a reference; the current rules are always the ones in Apple's App Store Connect and Google Play Console documentation.
What app name and category should I choose?
App Name: a unique and descriptive name that reflects the app's purpose and is easy to remember. Both stores limit the name to 30 characters.
Category: the most relevant category on each store. It helps users find your app when browsing or searching.
What are the requirements for app store screenshots?
Apple App Store:
iPhone screenshots for the largest display size (6.9-inch display, portrait 1320 x 2868 or 1290 x 2796 pixels). The App Store scales them down for smaller iPhones.
If the app is also offered for iPad, iPad screenshots for the 13-inch display (portrait 2064 x 2752 or 2048 x 2732 pixels).
Up to 10 screenshots per display size.
Google Play Store:
Number of screenshots: at least 2 and at most 8 per device type.
File format: JPEG or 24-bit PNG (no alpha).
Size: each side between 320 px and 3840 px, and the longest side no more than twice the shortest side.
Variety: include screenshots that show the main features of your app.
How should I write app descriptions?
Short text: a concise summary of the app's purpose. On the App Store this is the Subtitle (up to 30 characters); on Google Play it is the Short description (up to 80 characters).
Long description: a detailed overview of the app and its benefits (up to 4,000 characters on both stores).
What additional requirements are there for app submission?
Icons and logos:
Apple App Store icon
Size: 1024 x 1024 pixels. The App Store and iOS derive the smaller sizes from it.
File format: PNG without transparency.
Corners: Apple applies the rounded mask automatically, so do not draw rounded corners in the design.
Google Play Store icon
Size: 512 x 512 pixels.
File format: 32-bit PNG.
Shape: Google Play applies the corner mask and shadow itself, so provide a full square image and keep the important elements away from the edges.
Adaptive icon: for recent Android versions, an adaptive icon made of a foreground layer and a background layer, each 108 x 108 dp, with the key content inside the central 66 x 66 dp.
Privacy policy: both stores require a privacy policy URL.
App version information: version number and a description of what is new in each update.
Keywords: relevant keywords for the App Store search (up to 100 characters).
Support and contact information: a support email or URL for user enquiries.
What optional assets can enhance my app submission?
Promotional video: a short video showing the main features and interface of the app.
Localisation: if the app will be available in several countries, translated versions of the texts and screenshots above.