This collar does not work with the app but I reccomend it anyways since the batteries for the BF-30 are expansive,a dog will kill the battery within 3 weeks. Just get the BF-30 to keep on the side when you need to train your dog.

I have had this for the past 2 years, and it has worked great without any defects. The rechargeable model collar holds a charge, is easily recharged and has not caused any problems for my dog. I always take it off when she is in the house. If people are having problems with this they must be leaving the collar on all the time. I have recommended this to others, and will buy again if I move. Great customer service,

I purchased the High Tech Pet Door for my German Shepherd (KIA) and I was buying batteries every 2 or 3 months. With this collar, I just recharge it and it cost nothing. With this collar, I know that Kia will not be stuck out doors because her collar needs new battery. The best thing about it is it works on all the HtP products, so Kia only needs to wear one collar!

i bought the system 2 years ago and i am glad to found the supplement collar x-10 very good product

OK, did the research and bought this invisible-type-fence. Followed the easy-to-understand directions, charged and put the collars on, and did a little bit of training, not all that much really. Dogs (2) stay within their boundary, end of story. No headaches, no grief, it just plain works. Dogs now don't wear collars, except maybe once a month for a couple days as reminders.