[thedillio]

Can you sketch? A picture is worth a thousand words.

If you can create pictures either with a sketch pad or digitally then it will help your developer visualize it and make it work correctly.

Also "use cases" are very helpful. For example, instead of writing specs, write several stories about how a user might interact with the app. In my experience, these always help me develop a product more inline with the overall vision.

Lastly, you could send your sketches to a designer to create, then send those PSD/PNG files to the developer.