Why do my rankings differ from Google Search Console?

The two tools measure different things:

• RankScan runs its own Google search for each keyword on the scan day. It uses the country and language of the property and one device per keyword, desktop by default. The result is a snapshot.
• Google Search Console shows the average position over all searches in a period: all devices, all places and personalised results.

Both values are correct, but they rarely match exactly. Watch the trend over several scans rather than a single number.

You can connect Search Console to a property under property settings → Integrations. RankScan then also shows clicks and impressions per page. The guide Connect Google Search Console explains how.