When I've been practicing lessons on my computer instead of my phone, I can complete one lesson, which will read the Spanish out loud and have me transcribe it, but if I start the following lesson, the sound no longer functions, so I have to get the question wrong to go on. The sound on my computer works fine. When using the app on my phone, the questions in which I am to speak into a microphone have not been turning up. I was on holiday for a while, so I turned the microphone off, but it said it would give me the questions again after an hour. It's been a few days now.