Be a master chef overnight with Jamie Oliver's cooking app for iOS. The English chef has gained popularity for being a healthy-eating advocate and is well known for his TV show, The Naked Chef, which features mostly five-star home-cooked recipes.

Oliver has authored over 20 cookbooks that feature various culinary topics from baking, grilling, and traditional home cooking. A lot of these recipes come from his best-selling cookbooks such as Best of British, 10-Minute Meals, American Diner Classics, Asian Delights, and Get Kids Cooking.

Each recipe featured in Oliver's app come with a complete list of ingredients and step-by-step instructions on how to prepare the meal, complete with photos and video tutorials. There is also an additional section called Tips and Tricks, where Oliver shares some of his cooking secrets in preparing the best dishes.

Saving the best news for last - this wonderful cooking app is free to download. Users can have access to the basic app features (ingredients and instructions) at no cost. Freemium users receive 15 recipes that rotate weekly. There is however, a fuller version of the app available for purchase that unlocks additional recipes and tutorials.

Oliver considers himself a "food revolutionary" and has long been campaigning for healthy, delicious cooking. It was in June 2015 when Oliver announced that he will implement "sugar tax" on sodas and sweetened drinks served in his restaurants, as TechTimes previously reported. This was his way of protest against the UK government's refusal to apply additional taxation on soda companies.

"I've seen first-hand the heartbreaking effects that poor diet and too much sugar is having on our children's health and futures," Oliver said at that time.

He blames food and drinks that are high in sugar for the increasing cases of obesity and tooth decays among school children. Oliver advocates serving healthier dishes and controlling food portions in order to fight health-related issues caused by obesity.