I love where this is app is going... but it's not quite there yet.
Please kindly consider adding the following and you'll have a killer app worth $4.99 on your hands, in my humble opinion!
1. Font size and word density controls needed.
2. Landscape mode support needed for the largest, best possible images on an iPhone (less of an issue on iPad, but it certainly still applies).
3. Word bias fields would be an amazing addition, so that there can be tiered priority given to certain words or groups of words with controls for relative size and frequency levels for each tier.
4. Low resolution preview so that users can be spared the render time while repeatedly fine-tuning their creation.
5. Option to fill the background with the same (or different!!) set of words so that a word-group image could optionally have a word-group background.
6. Optional field that would allow for a single, central (center-biased), thematic word or phrase.
Thank you for your time, and keep up the great work!