Using the Dropbox Sign API when developing mobile native apps or responsive pages

Updated Sep 25, 2025

We highly recommend using a skeleton or simple page, since the iFrame needs the whole screen to display properly on mobile devices.
The API can be used in mobile applications but we do not currently have any examples or SDKs in mobile native languages.
Embedded.js, the library that supports the iFrame cannot run from inside a native app, because that use case is not supported outside of using a web view. One of the reasons for this is that we have a domain check and we have not expanded this needed security feature to handle native apps that would not have a domain to check.
You will need to open a WebView that loads a web page that contains the script tags and the client.open() method. You will not be able to do this from within a native component (which gets compiled to native iOS code), because that is not a supported use case.
The latest version of our Embedded package, Embedded V2, does not automatically inject a specific meta tag into the head anymore. It is up to the developer to properly build mobile support into your website. When upgrading to v2, website developers need to make sure the following meta tag is in their document's <head> if the wish to have a clean experience on mobile:

<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0">

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