Well, hiragana is used for japanese words eg kanji reading (furigana), verb ends, particles. Katakana is used for spelling foreign words, eg table - teburu - テブル, TV - terebi - テレビ. And your name would also be spelled in katakana. Hope it helps.

I will answer. Japanese write the katakana, it's that animal sounds, glass of sound, and, words that came from other countries. Now, katakana, which is most often used is the word that came from other countries. So, the name of a lot of apps are used Katakana well.

They sounds the same but are used for different sets of things.