No, you don’t need to wait for indexing to complete before searching. However, it is recommended to allow QuikFynd to complete the indexing to make sure all files in your device are indexed properly and that you will not miss a file when searching for it. 

QuikFynd performs indexing in two phases. First is a quick pass through your files, so that you can find your files by their name, size and other metadata information. Second is a deeper analysis for Full-Text Search.

For you to be able to search your files based on keywords within file content, indexing must be completed.