Create a word scramble, you need to add the clue and add an answer for the clue. Choose words from one common theme like Christmas, Easter, Nature, Technology, Beauty,
Princess, For kids.
Answer field supports only The Latin Letters. How much information does your app audience really know about the subject you are promoting or how much people know about features of your nationality, you can create quiz on any topic and the application publication on play store.
want to find niche for your app? Try making app for your social group/language.
If you know several languages, use less popular one.
Targeting small groups of people cam make your app a lot more popular.
You'll be able to find niches that are free from huge players on app market and make a great app for your social group.
Example of Word Scramble application:
Word Scramble Mania