By the way, what's holding you back from making the free antonym/synonym add-on (in features for those who haven't seen it) a part of the standard install? It works well as far as I can tell and is something most people would love. But right now because it's buried at the bottom features add-on, many people probably don't know it exists.
In the add-ons available screen, I would
- get rid of the "all items" and "support" heading. There are only choices list. Separating the four choices under two headings seem unnecessary and potentially more confusing. It makes look more cluttered.
- likewise, I think the all the headings such as "characters", "audio", "by category", etc, in the features and dictionaries list are unnecessary and add clutter. There is also repeated heading of "early access". Since add-ons are the core of your business, you'd want these screen to be easy to view, attractive, sufficiently informative for people to choose to download the add-ons. Some further information/screen shots on the fonts and dictionaries would help. I don't see why not as much info as you have on the website about them. So people wouldn't need to go to the website to get more info before purchasing.
And a repeat of a previous comment, how about adding the "+" add-to-flashcard button to the portrait mode on the phone. The search box can be shortened, without too much detriment.