Installing the Google+ App
Google has created a custom app of Google+ for both Android and iOS users. You can download the versions from Google Play (formerly called the Android Market) and the Apple App Store for iOS users.
Aside from a few interface changes, the Google+ app is largely the same on Android and iOS devices. However, because Android and Google+ are Google products, the Android version tends to have a few extra features (such as Instant Upload for photos) and is usually updated with new features first. Both iOS and Android smartphone owners get a vastly improved Google+ experience by installing the Google+ app, so I recommend downloading it as soon as possible.
Installing the Google+ App on Android
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