Not exactly your fault. Look at Disconnects own blog about this promotion, https://blog.disconnect.me/pro-app-for-samsung-apple/

Same here. If I click the link in the Samsung Browser on my Galaxy Note 4 it takes me to the Galaxy App Store but says “This app is not available for your device”. In fact on my Note 4 it only lists Disconnect for Samsung Browser in the Galaxy App Store. My friend has a Galaxy S6 and Disconnect Pro is available in…