Google has just finished kicking off its annual Google I/O developer conference, with a main keynote that provided us with a closer look at what the company has been up to in recent months as well as what it has planned.

It announced everything from HBO Now for Android to a new photos app called Google Photos. Thus, in order to help you catch up and process everything, we've rounded up all the major announcements from the company's main keynote.

You can also playback the live stream from here, or check out Pocket-lint's Google I/O hub for more analysis.

Google I/O on YouTube: https://www.youtube.com/watch?v=7V-fIGMDsmEScreen Shot 2015-05-28 at 9.53.45 AM

Three months after launching solely for Apple TV and iOS devices, HBO Now is finally ready to make its way to Google Play. Google's Sundar Pichai has confirmed HBO plans to release a version of the HBO Now app for Android.

The service costs $14.99 a month and provides access to HBO's entire TV and film catalogue. It'll likely be limited to the US though, because Sky already has an exclusive agreement with HBO in the UK.

Read more: HBO Now is coming to Google Play, no longer an Apple exclusive

GoogleScreen Shot 2015-05-28 at 18.05.03

Google gave us a sneak peak of what to expect from Android M, the next version of the Google operating system. It appears to be about improving the core user experience in Android, as six main areas were highlighted.

There's no official word on the launch date for the consumer release of Android M, but there will be a developer version available for the Nexus 5, 6 and 9. Also, Google siad Android Pay would launch with Android M later in the year.

Android M, as it is called at present, will likely be called Android Milkshake when it launches. An Android Wear watch worn by Google's vice president of engineering (seen here) clearly showed a picture of a milkshake on stage.

Read more: Android M previewed: Android Pay, fingerprint support, USB Type-C

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Google also took time to discuss its mobile payment system, Android Pay, which is coming this summer. It will work at over 700,000 US retailer locations, and Google has partnered with several banks to make payments easier.

But Android Pay goes beyond shop payments using a smartphone in the real world. It can even apply vouchers, deals, or loyalty cards automatically. In-app payment will be easier too, and fingerprint scanning has been standardised.

Read more: Android Pay detailed: Fingerprint payments, due this summer

Google I/O on YouTube: https://www.youtube.com/watch?v=7V-fIGMDsmEScreen Shot 2015-05-28 at 1.01.54 PM

Google has announced its Project Brillo program, an underlying ecosystem that will potentially make the Internet of Things possible. Brillo will utilise an Android infrastructure to enable a "true universal standard" for smart devices.

It is in its early days at present, with a developer preview of the operating system not due until the third quarter of this year, but the company is positive that it will become the de facto standard for manufacturers to adopt.

Read more: Brillo: Google's ecosystem to make the Internet of Things work

GoogleNow on Tap

Google Now is all about context, but an upcoming "Now on Tap" feature in Android M will make it smarter than ever. It knows what you're doing on your smart device so you can get more information by simply asking or tapping.

Here's an example of how it works: Listening to a Skrillex song? Ask for his real name. Google will know who you're referring to, can show you the search result in a card over the app you're using, and then brings you back to the music.

Read more: Meet Now on Tap: Google Now just got way smarter on Android M

Google I/O on YouTube: https://www.youtube.com/watch?v=7V-fIGMDsmEScreen Shot 2015-05-28 at 11.41.31 AM

Google also introduced an entirely new product: a photos app. Yup, it's the long-awaited Google Photos app that you’ve been hearing so much about in recent weeks. It's free and out now for iOS devices, Android devices, and the web.

It can store unlimited, high-quality photos and videos for free (will maintain the original resolution of photos up to 16 megapixels as well as videos in 1080p) and uses machine learning to auto-oragnise all your media.

Read more: Google Photos is unlimited and free: What you need to know

Pocket-lintGoogle Cardboard

Google has announced a new version of its cheap and cheerful virtual reality viewer, Google Cardboard, that not only fits screen sizes up to 6-inches, but will also work with iOS. It is similar to last year's model in look.

It is still made of cardboard, as the name suggests, and requires manual folding after purchase, but it now only takes three folds to construct and it comes with a better magnet button. It's not clear when this version will release yet.

Read more: New version of Google Cardboard coming, will also work with iPhone

GoogleGoPro Jump

Google has teamed up with GoPro. The result is Jump. It's a camera rig with 16 GoPro Hero4 camera. It captures 3D video and images for an immersive VR experience. From the summer YouTube will support Jump for VR.

To watch Jump videos, which are basically stereoscopic virtual reality video, all you need is YouTube on your smartphone along with Google Cardboard. The Jump kit will also be made available to developers later this year.

Read more: Google and GoPro's Jump will bring stunning VR video to everyone