Hold properties constant in a Funnel Analysis chart

By default, Amplitude doesn't hold properties constant in a funnel analysis. The funnel chart displays the unique count of users who have gone through the funnel once or more. For example, if a user goes through the entire funnel multiple times, they only count once.

For the following chart, if a user converts this funnel (View Item -> Add to Cart -> Complete Purchase) ten times over the last day, they only show up once.

If, however, you opt to hold properties constant, the funnel chart displays the unique count of user and user/event property pairs that completed the funnel. If a user goes through the entire funnel X times with Y distinct event property values, the user counts Y times.

For example, if a user converts View Item Details -> Add Item to Cart -> Complete Purchase with ten different Item_ID property values, they show up ten times in the chart. Here, Item_ID is an event property sent for all three events in the funnel. An event property can only hold constant when you instrument it for every event in the funnel.

Use this method to build session-based funnels. To do this, hold [Amplitude]Session ID constant, as shown here.

A user must complete each step in the funnel with the same session ID to count as converted. A Funnel Analysis chart with this setup doesn't show unique users, because users can complete the funnel multiple times in different sessions.