2 isn't some magical age, she might not have been ready to be worked with at that time. Potty training is a very child lead thing. Just keep reminding her, maybe go potty at that same time as well . I used an app on my iphone with my daughter and stickers as well. A lot of kids get too wrapped up in playing, it happens to my daughter on occasion and would probably happen more if she wasn't an expert pee and poop holder lol.