mosquito repellent software on mobile phone does it really work: review

This post is a sequel to my last post, i downloaded and installed mosquito repellent application on my android cell phone more than four of them see the below pic and planned to give it a try yesterday night and opened all the windows in the evening virtually inviting the mosquitoes in and closed all the windows by 9pm and i was happy to see there were more number of them than regular and was happy to perform the test.

All the repellent applications i downloaded on my mobile phone has an option the change the HZ / frequencies to generate sound, it is said that dragon flies are natural predators that eat mosquitoes in the flight they generate frequencies between 20 and 67hz keeping that in mind i set the frequency in between the flight range of dragonfly i kept in near my pillow turned of lights and waited for results.

Ultra sonic sound really drives mosquito away? the results were mixed i was not able to come to the conclusion i tried for three days with three different apps and finally rounded that it really does not work because few of the time at the night i was hearing the buzz of mosquito near my ears.

I thought it would be very healthy if it really works because we can get rid of chemical based insecticides to kill the mosquito and other insects pests, there is no scientific evidence that ultra sonic sound really get rid of pest and EPA and many universities proved ultrasonic sound really does not have effect, but still companies are marketing there products, though i tested it for only three days and came to this conclusion if you think it really worked for you guys then share you experience and tell us the frequency or application software used to achieve this.