You might be able to find a free microphone spy app, but that doesn’t mean you should try it. When you allow an app to take over and control someone’s phone, you’re basically trusting that company with every bit of data. And as the old saying goes, if you’re not paying for the product, you are the product. That means with a free app to remotely turn on cell phone microphone, you could be putting your kid’s data at risk — and yours too.