I think this works but you need to play it through an actual speaker like a Bluetooth one. Other wise it won't have the decibels to work in a decent sized area.
Be prepared for pests to still come. It is in their nature to still try to enter your home. The trick is they will not stay because of the sound. Don't expect immediate results or to hold your phone to a roach and expect it to immediately leave. This is more of an ongoing effect that makes them not feel safe to stay and reproduce.
My main complaint is the ads. I understand them as this is free. I swear though it will play the longest most obnoxious ads imaginable.
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