Shoppers can compare Aldi prices to other supermarkets using MySupermarket app App will compare prices with Tesco, Asda, Sainsbury's, Waitrose and Ocado Aldi sales have jumped by 31.5 per cent in the last year alone Discount supermarket has launched a full school uniform set for £4 By Rachel Rickard Straus Price-savvy shoppers can compare the cost of Aldi products against the other major supermarket rivals from today using an online app. MySupermarket.co.uk already allows shoppers to compare the cost of items at Tesco, Asda, Sainsbury's, Waitrose and Ocado. From today it will also compare prices on all Aldi products. Since most products are own label, MySupermarket will compare them to the equivalent own label products at other retailers. New feature: From Sunday shoppers will be able to compare prices at Aldi with its rivals The tool could go some way to helping shoppers discover if they really could be saving money by shopping at the discount supermarket. Aldi has become a darling of the recession-hit middle classes, seeing sales rise by 31.5 per cent in the last year and massively outpacing the big four of Tesco, Asda, Sainsbury's and Morrisons. It has made huge efforts to attract Middle Britain shoppers by introducing a range of superior products at budget prices from fine wines and spirits, to coffee, olive oil, Aberdeen Angus steaks and even fresh goose for Christmas. The group slims down its overheads and profit margins to the minimum with minimalist stores, fewer staff and charges for plastic bags. Its approach has proved popular because of the resulting low prices which appeal to a nation suffering the longest and deepest cut in incomes and living standards ever recorded. Gaining popularity: Aldi sales are rising as it increases its market share Last month Aldi launched a basic school uniform set for boys and girls of any age for just £4 - the lowest priced supermarket uniform in the UK. Shoppers will be able to use the MySupermarket.co.uk website or its mySuperlist app to see their shopping basket compared to Aldi or put together an Aldi shop to buy offline or using the app. James Foord, Head of Marketing and Business Development for mySupermarket said: "Aldi are the fastest growing retailer in the UK and are building up a good reputation for some great products at great prices. Because of this, we want consumers to be able to see their products & prices online and compare where possible to the other supermarkets. Serial savers: Comparing the cost of individual items could help shoppers save money at the till