Tana is an advanced PKM app that blends databases, outlines and tagging into one powerful graph. Unfortunately, its complexity implies spending a lot of time setting up your system, not to mention maintaining it over time.
Routine provides the equivalent of "supertags", known as custom types. Coupled with views and canvases, Routine offers the same customizability as Tana. However, Routine goes further by integrating with hundred of services. As a result, your Routine local-first knowledge graph is enhanced with data coming from third-party services and automatically enriched, removing the burden of maintaining a knowledge graph by hand.