Bierkeller is a free iPhone app developed by Arne Tempelhof, designed specifically for beer enthusiasts who want to keep track of their beer collection. With Bierkeller, you can easily manage and organize your beers, ensuring that you never lose track of your inventory again.

The app allows you to enter the expiration dates and quantities of your beer bottles, and it sends you notifications before a beer is about to expire. This feature ensures that you can enjoy your beers at their best, without worrying about drinking them past their prime.

In addition to tracking expiration dates, Bierkeller also allows you to add additional information to your bottles, such as alcohol content, beer style, or International Bitterness Units (IBU). This information can be useful for beer enthusiasts who want to keep a detailed record of their collection.

Searching for specific beers in your cellar is made easy with Bierkeller. The app provides a search function that allows you to quickly locate a particular beer, saving you time and effort.

One of the standout features of Bierkeller is its cloud backup functionality. This ensures that your beer collection data is securely stored and can be easily restored if you switch devices or accidentally delete the app.

Please note that Bierkeller requires an untappd account for usage. This integration with the popular beer social network allows you to access additional features and enhance your beer tracking experience.

Overall, Bierkeller is a must-have app for craft beer lovers who want to keep their beer collection organized and ensure that they never miss out on enjoying their favorite brews.