Google has announced that Inbox Gmail app is now available for Android and iOS tablets, and supports Firefox, Safari and Chrome web browsers.
Taylor Kourim, a software engineer at Google wrote on the Google blog that the move is designed to "check off some of these to-dos for Inbox, making it easier to use on more devices and browsers".
Inbox Gmail was launched in October to give Gmail users a dedicated browser-based application to remove inbox clutter and confusion.
The Inbox app expanded on the categorisation introduced into the Gmail web and mobile apps in 2013, which enabled emails to be split into Primary, Social and Promotional, and adds the ability to collate similar messages into 'Bundles'.
Inbox also provides the ability to set reminders so that to-do lists are displayed at the top of the inbox.
A ‘highlights' feature draws out important information from emails so that it can be viewed at a glance without needing to open the messages.
Making Inbox available for iOS bypasses the need for Gmail users to download the Sparrow app, which acted as a Gmail client for Apple's mobile operating system.
Google acquired Sparrow in 2012 but, with Inbox now on iOS, the app has been removed from Apple's App Store.
Removing Sparrow will not surprise its users, as the Google team had not added iOS 8 support for Sparrow or updated the app for Macs since its acquisition.
Google still requires people who wish to use Inbox to submit a request for an invitation, despite widening that availability across devices and browsers.
This raises concerns about Kourim's claim that "now's a perfect time to jump in" with the app.
V3 contacted Google for more comment on the availability of Inbox by Gmail, but the company has yet to respond.
Google appears to be bolstering the functionality of its web apps by allowing users to download Gmail and Calendar data to back-up information stored in the services.
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