IBAN-Rechner is a free iPhone app developed by Jan Thewes that falls under the category of Business & Productivity, specifically Finance. This app allows users to convert their bank account number and bank code (BLZ) into a valid International Bank Account Number (IBAN). With the introduction of IBAN as the standard for all European financial transactions since February 1, 2014, this app proves to be a handy tool for individuals who need to perform transfers within the European financial area.

The app ensures the privacy of user data by not sending any bank details, such as account numbers, IBANs, or BICs. It uses Crashlytics for error analysis, where information about app usage and encountered errors is collected and sent to a central server. However, the user-entered data never leaves their device. More information about this can be found in the app's privacy policy.

IBAN-Rechner simplifies the process of generating and storing personal IBANs for quick access. It provides a convenient solution for individuals who frequently need to perform financial transactions within the European financial area.