Yes, you can use eformsign on smartphones and tablet PCs, we you can also download and use eformsign apps on mobile.
You can download the app on App Store and Google Play. For Android, version 5.0 (lollipop) and later are supported. For iOS, version 6.1.6 and later are supported.
Note that you do not need to install an app to use eformsign and you can use eformsign on mobile using a browser without installing an app.