Divster - the first and second around 20-25 minutes.
I think the third is 40 minutes, but I'm not there yet.
The next part of this post is going to be a Gastric band app love bomb. (Help yourselves to a sick bag 
)
I've figured out why this is working so well for me (I think)
I've done weight watchers and slimming world with some success, but with both, my driving force has been "How much can I eat and get away with it" or "if I save up so many points now, I can have a crunchie and a bag of crisps at the weekend".
Nothing (before now) has ever actually tackled my overeating problem. I've still been able to eat all day, every day, if that's what I wanted to do.
Listening to this app seems to have changed my life (I know I'm only three weeks and a bit into it, so we're still in the honeymoon phase)
I have lost all cravings to snack all the time. I eat three smallish, sensible meals, and I'm happy with that. I don't feel I'm missing out, as, well, if I really want some chocolate, I can have some. But the thing is, I don't really want it.
Other diets focus the mind on food, they make you think about food all the time. This app is different. I barely think about food anymore. I don't get the almost physical pain when I tried to deny myself anything.
Today for the first time ever, in sainsburies, I looked at the massive row of sweets and chocolates lining the front of the kiosk, and instead of mentally picking out the ones I'd like, or actually buying four one, it struck me how pretty they looked, all the shiny wrappers and bright colours.
I've never, ever seen beyond the instant chocolate fix before.
Sue, if you're reading this, I think I love you!