دادحساب dadhesab is the first comprehensive app for legal and judicial calculations with a six-year history and tens of thousands of users from different legal backgrounds. The app offers a range of features, including calculating legal fees and court service tariffs, calculating the deadlines and legal dates of civil and criminal litigation, and calculating the delay compensation based on the latest Central Bank indices. It also allows users to search for lawyers, judges, court employees, official experts, family consultants, and students of law. The app is available on Android, iOS, and Web platforms, and it provides reliable and documented results with references to relevant laws and regulations. The app is free and is developed and supported by Mohsen Dehghani Baniani, a former court attorney and app and website developer.