Costbook is a fast, friendly expense tracker for iPhone, iPad and Apple Watch. Add an expense in a few taps, or scan a receipt and let AI fill in the amount, date and category. Organize your spending into lists, from monthly bills to a holiday or a wedding, each with its own charts and totals in any currency. Costbook Plus adds sync, unlimited lists, PDF/CSV reports, a map view and shared lists: invite friends, they join for free, and Costbook shows who owes whom. Available in 34 languages.