Platform marks used to identify app availability, without implying endorsement.

Android robot: The Android robot is reproduced or modified from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License.
https://creativecommons.org/licenses/by/3.0/
https://developer.android.com/distribute/marketing-tools/brand-guidelines#brand-android
Shape unchanged; displayed monochrome. Android is a trademark of Google LLC.

Apple silhouette: Apple is a trademark of Apple Inc. Used only to identify the iPhone platform. No App Store availability is claimed.

SVG paths from Simple Icons (CC0 project license; individual brand rights apply), commit 4ba19240849175ab4b855a732ab98c0f87cfb714:
https://github.com/simple-icons/simple-icons/blob/4ba19240849175ab4b855a732ab98c0f87cfb714/icons/android.svg
https://github.com/simple-icons/simple-icons/blob/4ba19240849175ab4b855a732ab98c0f87cfb714/icons/apple.svg
https://github.com/simple-icons/simple-icons/blob/4ba19240849175ab4b855a732ab98c0f87cfb714/LICENSE.md