A deep link has an app identifier that specifies the app in an app store. It also has an address of an instance of the app on a device. Deep links can bypass an ad blocker. A first instance on a first device cannot get ads from an ad server, because the ads have links with domains in a blacklist. A second device gets a deep link with the address of the first device. The second device runs an instance that gets an ad and rewrites links to point to the second device. The ad goes to the first app instance. The ad blocker finds no bad links and lets the ad appear on the first device. If the user picks a link, a message goes to the second device, to relay to the ad server.