I hope that the app makes it clear which country/culture it applies to. (I assume it's for a European-origin family in the US?)
We recently had a kid, and in case of our native culture (Japan), people want to pick a name that not only sounds good, but also carries "good fortune" in its characters... based on ancient literature or something (it's kind of feng shui, I guess). The shape of the letters also kind of matters. Note that Chinese characters not only carry sounds but also represent a meaning (ideogram) that adds to the complexity. Also in Japanese many characters tend to have multiple readings. So there are tons of websites where you can search kids name with various conditions (sound, meaning, shape, strokes, popularity, etc), and they look pretty popular.
My point is that, the requirements and restrictions of names differ vastly between cultures, and the app can be clear about it.
We recently had a kid, and in case of our native culture (Japan), people want to pick a name that not only sounds good, but also carries "good fortune" in its characters... based on ancient literature or something (it's kind of feng shui, I guess). The shape of the letters also kind of matters. Note that Chinese characters not only carry sounds but also represent a meaning (ideogram) that adds to the complexity. Also in Japanese many characters tend to have multiple readings. So there are tons of websites where you can search kids name with various conditions (sound, meaning, shape, strokes, popularity, etc), and they look pretty popular.
My point is that, the requirements and restrictions of names differ vastly between cultures, and the app can be clear about it.