A no-spend challenge tracker for iPhone. Seal each no-spend day as a gold coin, fill a Mint Calendar, see a savings forecast and log impulse buys you walked away from. Groceries and transport don't break a day. Streaks, quests, 25 levels, badges, widgets and Siri. Free: the tracker keeps working; Pro (weekly, monthly, yearly or lifetime) adds challenges, insights and export. No account, no bank login, no ads, no tracking; data stays on your iPhone. 32 languages.