# Ruby tracker SDK
> Track events in Ruby applications, gems, and Rails web apps with the Snowplow Ruby tracker SDK compatible with Ruby 2.1+ and 3.0+.
> Source: https://docs.snowplow.io/docs/sources/ruby-tracker/
> Documentation index: https://docs.snowplow.io/llms.txt

[Actively maintained](/docs/sources/tracker-maintenance-classification/ "Production ready, frequent releases, dependencies kept up to date")

Feature support [Compare trackers](/docs/sources/#compare-trackers)

- Supported: Page or screen views (Page and screen)
- Not supported: Activity tracking
- Not supported: Built-in entities
- Not supported: Anonymous tracking
- Not supported: Media
- Partial: Ecommerce
- Not supported: Consent
- Not supported: Snowtype

The Snowplow Ruby Tracker allows you to track Snowplow events in your Ruby applications and gems and Ruby on Rails web applications.

The Ruby tracker is compatible with Ruby 2.1+, including Ruby 3.0+. The current tracker version is 0.8.0.

These pages will help you in setting up and using the Ruby tracker. There are more technical details in the [API docs.](https://snowplow.github.io/snowplow-ruby-tracker/SnowplowTracker.html)

As a server-side tracker, the Ruby tracker pairs very well with the JavaScript client-side tracker, if you are tracking events in a website. We've created a [simple demo Rails app](https://github.com/snowplow-industry-solutions/snowplow-ruby-tracker-examples), which incorporates both trackers, and also uses the Singleton pattern that we suggest for the Ruby tracker.

At its simplest, the Ruby tracker is used by calling a Tracker object's `track_x_event` method, such as `track_page_view`, which will send the event payload created to the Snowplow event collector.

There are three main classes which the Ruby Tracker uses: trackers, emitters, and subjects. These are introduced in more detail on the [next page](/docs/sources/ruby-tracker/getting-started/). There are also further classes which allow you to add extra data to your events, discussed on the page '[Adding data to your events: context and more](/docs/sources/ruby-tracker/adding-data-events/)'.