This would be great if it didn't require me to mark negatives. in other words, it requires me to mark everyday I did NOT do something, such as smoke a cigarette or drink alcohol. This is overly cumbersome over time and is going to cause me to stop using the app because I don't want to have to check everything that DIDN'T happen. This could be much better if it assumes I didn't drink or smoke if I didn't make any mark for that day. Or at least give me the option to do it this way.