To Compact a Database...

- tap on 'Tools' menu
- tap on 'Options' item
- tap on 'Compact Database...' item

Compact Database
    Pocket Access databases do not automatically shrink in size after records are deleted.  So, after many inserts/updates/deletes the database may be bigger in size than it actually needs to be.  To force the Pocket Access database to resize, you can use the 'Compact Database' feature.  Note: you will need approximately 1.5 times the size of the existing database of available memory and when done the original un-compacted database will remain as a backup (which you can manually remove, later).