A new device called Aire, which can help determine what foods make you gassy, is now available for pre-order from the startup FoodMarble.

Aire is a small, portable device that is paired with its app to serve as a personal digestive tracker, FoodMarble says on its site. The device allows users to find the food that will most likely go well with their digestive system.

Aire was created to help those who struggle with problems like bloating, abdominal pain, constipation and diarrhea, which can be caused by certain foods.

“When food isn’t digested fully, a lot of it will turn into gas in the gut,” FoodMarble explains. “Many people cannot efficiently handle this gas, so it builds up causing bloating, pain and even diarrhea or constipation. It turns out though, you can measure how much of this gas is being generated. Gas that’s in the gut can seep into the bloodstream and upon reaching the lungs, it transfers to the breath.”

This technology has been used for more than 20 years by medical experts, but the new device makes it easier for those with digestive issues.

“We’ve adapted the technology, making it smaller, portable and more affordable for personal, everyday use,” says FoodMarble.

The app allows users to track their food intake, gas levels, sleep and stress to bring symptoms under control. Aire conducts “FODMAP tests” which analyzes how a user’s gut responds to common carbohydrates like fructose and lactose. The data is then cross-referenced with the Aire food database to translate a user’s breath reading to personalized food suggestions.

The device is available for pre-orders and FoodMarble will begin shipping the first batch in August 2017. The Aire devices, which are available in different colors, are at a special early bird price of $99. The device’s original price is $149.