This should be free. – Learn Thai - Free WordPower Review

The full version is decent, though it needs some fine-tuning. But to sell a one-word version for $0.99 without knocking a dollar off of the linked premium version feels a bit shady. Just my opinion. Make the light one free and update the bugs in the full version, and I'd probably rate five stars.
Review by shiftyfish on Learn Thai - Free WordPower.