awful app. Paid 5 for a month of use because trial games were fine but the paid games wouldnt even play sounds 75% of the time, so completely useless for improving hearing in background noise.
Developer reply
Hi there, We've responded to your contact form request for equipment troubleshooting via email. Note that both the free games and the paid premium games are using the same standard Android audio libraries so if one set works fine the other set should work as well. Please give us at least 24 hours to respond to any technical assistance requests.