Notes + is probably the app that matches your needs the best. I think you may be hard pressed to see any app that has any search function. The issue is that all note taking apps that don't use the keyboard transform the drawn text into an image, either in pdf or jpg form. That being the case its not really searchableHere are my requirements...
- needs to allow creation of folders or categories directly in the app
- need to have the ability to send the notes out in an email or export directly to a word or PDF file. I can't use an external synching service due to the sensitive nature of the data
- needs to have a built-in search function
- needs to have drawing functionality
- tagging would be a bonus
- audio recording would be a bonus