This app cant sync easily with my bracelet, and its support website is in either Chinese or Japanese (pardon my ignorance of the two), so its impossible for me to communicate problems to the developers. Very bad grammar within the app makes it difficult to use and is offensive. I wish I hadnt wasted my money on this device because its useless without the app working minimally. Sorry, but why release a product this bad in a language you didnt bother to get proofread by a native speaker?