From today, using 3rd-party services on your mobile device in conjunction with Google's office programs became that much easier. Google Docs and Sheets now have available Android add-ons within the Google Play web storefront or directly via GoogleSheets and Docs. Simply download them and instantly have the capability to do a whole range of extra jobs such as preparing a contract for e-signing or importing CRM data.
The first batch of add-ons have been produced with several partners. For example, CRM data is incorporated into Google Sheets via ProsperWorks. A signing process is completed in Docs or Sheets via DocuSign's add-on, while one can use data in Sheets to create mobile apps through AppSheet. Finally, Scanbot uses OCR to first scan business documents and then recreate them as editable text within Docs.