diff --git a/README.md b/README.md
index e5e6138..f0fe9cf 100644
--- a/README.md
+++ b/README.md
@@ -10,13 +10,20 @@ This repository contains the open source Tailscale Android client.
## Using
-[](https://f-droid.org/packages/com.tailscale.ipn/)
[](https://play.google.com/store/apps/details?id=com.tailscale.ipn)
+Help us test new features and bug-fixes before they ship to all users! A [beta testing track](https://play.google.com/apps/testing/com.tailscale.ipn) is available on the Play Store.
+
+#### Amazon Appstore
+
+The app can be downloaded from the [Amazon Appstore](https://www.amazon.com/dp/B0D38TRB3N) for Amazon Fire tablets and Fire TV devices.
+
+#### F-Droid
+
+The [F-Droid](https://f-droid.org/packages/com.tailscale.ipn/) project builds the source code in this repository and maintains independently-built APKs. Note that F-Droid builds are not released, updated, or verified by the Tailscale team.
+
## Preparing a build environment
There are several options for setting up a build environment. The Android Studio