App for androïd phone

I need someone available to start right now the project ! I have an app to learn vocabularies in foreign languages It works with audio files and voice recognation the app gives couples of words in 2 different languages, and the user must answer if the couple of words is correct or incorrect for exemple, the app proposes cat-> chat. If the couple of words is correct the user doesn't speak, if it's incorrect the user must say "no" cat : English word, chat : French word when the user have answered the app switch to an other couple of words my issue is about the time that the user has to answer before that the app switch to the next couple of words. To use voice recognition : go to setting-> advanced-> tick use speech to answer when you click on study the app will says couple of words to answer with voice you should setting that for correct couple the user doesn't speak, the app understand the silent as "yes" then the app switch to an other couple of words Description of the task : The time of assement of the answer is too long. There is one sound that I would like to remove ( at the end of the second word) I must speak very load for that answer is take account, I would like to speak normaly. Sometimes the voice recognation doesn't work properly Sometimes the silent is not taken account as correct answer and the couple pf words is said again. In attachement you will find, the last version of the app and decks to use it.