Appengine Search API vs Datastore

Question

I am trying to decide whether I should use App-engine Search API or Datastore for an App-engine Connected Android Project. The only distinction that the google documentation

Answer 1

The Datastore only provides a few query operators (=, !=, <, >), doing nested filters and multiple inequalities would either be costly or impossible (timeouts) and search results may give a lot of False Positives. You can do partial string search by tokenizing but this will bloat your entity. Best way to get through these limitations is using Structured Properties and/or Ancestor Queries.

Search API on the other hand runs a Full Text search on Search Documents, which is faster and more accurate than NDB queries without relying on tokenized data. Downside is it relies on data staying up to date.

Use Datastore to process your data (create, update, delete), then run a function to put these data as documents and cluster using indexes, then run the searches using the Search API.