2ND TO NONE.
This app is the best at what it does. The frequency range is a big factor in deciding which app to get and this app can go al the way to 30000hz is a huge leap from similar apps. The fact that this app is built from ios8 is awesome because it has a new interface unlike the other apps which are outdated.FILTHYSANDMAN
What the frak
Disappointing big time. This thing should be free. The tone selector is horrible because it's a slider. It jumps from 15 hz to over 200hz. So if you want to experiment with specific frequencies, you can't. Wish I wouldn't have wasted my money on this oneMK UltraMega
Scared away the noisiest mice...
We were staying in a cabin with some very noisy mice in the walls - chewing and scraping all night. I put my phone in the cupboard where the noise was loudest, and left this app running. The mice went crazy! They squeaked and squeaked and then ran to the other end of the house and stayed quiet all night. I don't know if it would work long term, but it definitely gave us a good night's sleep we wouldn't have got otherwise...Tympa
Useless
Tried for hours to find a frequency that would repel the mosquitoes but to no avail. Researched on the net the frequencies of normal predators, male mosquitoes, etc. and nothing worked. According to studies, female mosquitoes are not sensitive to ultra-sound and all previous campaigns conducted at big scales failed. Do not buy.jciek
