Das Barometer is a lifestyle app developed by PMD Agentur M-Verlag for Android devices. It is the official companion app to the exclusive coupon book for Oldenburg and Cloppenburg. The app provides access to hundreds of "2 for 1" coupons from various restaurants, leisure activities, and cultural events, as well as high discounts on retail stores. The app is designed to help users discover new places and experiences while saving money, following the principle of "Use for two, pay for one".

The app provides an easy search option for coupons, allowing users to filter by location, industry, time, and more. Additionally, users can mark their favorite coupons and keep track of those they have already used. It is important to note that all coupons and discounts are only valid with the printed book and are subject to the conditions listed in the book.