creates a food diary, with a calorie counter, for Twitter users who sign up to the free app.
The app helps people to lose weight by allowing users to list what they are eating in a chronological diary format, aided by CrowdCal, a user-driven calorie database.
It is also believed that the public stigma attached to sharing food consumption via Twitter shames some into eating sensibly.
To use the app wannabe slimmers use the direct message option in their Twitter status update to tweet their daily intake privately, whether it's an evening meal or coffee.
Food and drink entries then updates in their personalised and public food diary hosted on the Tweet What You Eat website, alongside the total amount of calories consumed.
Users can also create a 'Do Not Eat!' taboo list and engage other users on the Tweet What You Eat website.
Fry has reportedly lost six stone using Tweet What You Eat, while the recent appearance of Lucas' new slim line figure in celebrity magazines has been attributed to the app.
The website's creators have also opened an , selling mugs, t-shirts, travel flasks and badges to capitalise on its growing popularity.
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