At the moment Investing.com does not have any API for its quotes.
We do, however, have our offering of widgets for web developers at the following link –
These WMTs will soon all support responsive screens, so you may use them as an iframe in your app, in mobile view.
We offer these widgets free of charge as they are on our website, so please make sure to read the terms and conditions prior to embedding these widgets on your website.
* Some modifications
For additional questions and special requests, and pricing information, please contact firstname.lastname@example.org