App has been too slow to open. It takes almost a minute to open. The cameras often get offline by themselves n you have to reboot the panel several times to try to fix em. It takes a while to get em to work again. The instruction to make the app work faster are always wortless. If your doorbell camera has problems they ALWAYS replace em with refurbished doorbells. had problems with mine for months . took almost several refurbished doorbell cameras until they fixed it installing a brand new one