Foods have a point value, the formula calculates that based on the protein, fat, fibre and carbohydrate content. Almost all fruit and vegetables have 0 points, so you're encouraged to fill up on those. Nothing is off limits, but that Domino's pizza was a whole day's points, on it's own. And that was with the low fat cheese. Back in the old days you jotted points down in a notebook and looked foods up in wee notebooks. Inevitably, there's an app for it now.
It also has a pretty graph to show what you've lost - that 7 there means I've passed 7lbs. Although the app and website accommodate those of us who use metric, the reward system is still using imperial.
I'm happy to be losing weight, mostly because I was aware that carrying extra was not helping my mobility. Or indeed my hypermobility - extra weight puts extra strain on joints. It's not really about looking slim and my target of 75kg won't make me slim. It's just about making myself a bit healthier. There's also the fact that I was going to have to replace most of my trousers if I didn't lose a bit!
Weight loss and in particular "the diet industry" is hotly contested amongst feminists. So for some of my friends, I know, I am a bad feminist for not only dieting but also for paying my £19.99 a month to an American-based multinational diet company. I don't think the fact I buy very few of their products redeems me much*. Kate Harding's Shapely Prose is just one example of many fat acceptance sites. She makes some very good points and since my aim is to end up a plump size 14-16 at the end of this I'll probably continue to agree with them then.
But I don't buy that trying to lose some weight necessarily makes you a traitor to the sisterhood. Even for people whose motivation is to look a bit better in a swimsuit. There must be some middle ground where we can say "hey, we don't all need to be a size 10" (or 8, or 6, or 0), where we acknowledge that you can be happy and beautiful and yes, healthy, at a whole range of weights but can also be supportive of people who want to be a size or two smaller than they currently are, for whatever reason, rather than publicly castigating them for it.
Replacing an inflexible hegemony about being slim with an equally rigid hegemony about being fat doesn't do anyone any good.
*I do admit to rather liking WW's Chocolate Caramel Wafers, £1 for a pack of 5 at Tesco right now. They're pretty close to Tunnocks' version but 2 points rather than 4. .