content: Great idea. I am an environmentalist and absolutely loved the concept. I use Vivo phone. My concern is that the App keeps crashing after a day of use as soon as I open. Tried to switch off reinstall latest 4.7.3 version and also use beta version. I would like to use it regularly recommend others and if it doesnt crash I would certainly buy it. Please consider fixing the crashes asap. I have already reviewed the comments and found that it keeps crashing on most Vivo phones. Please note that I have tried the latest version upon your request in reply to this review. Cant wait to give you 5 stars after its use. Please let me know when you fix the issue.