# DueZen Help > Help and how-to guides for DueZen, the calm bill, subscription, and savings tracker for iOS and Android. ## Docs - [App Lock](https://docs.getduezen.com/advanced/app-lock.md): Protect DueZen with Face ID, Touch ID, a fingerprint, or a 4-digit PIN, and understand what happens if you forget it. - [Auto-pay and flux alerts](https://docs.getduezen.com/advanced/auto-pay-and-flux-alerts.md): Mark auto-paid bills automatically, get prompted to check variable amounts before they bill, and set a grace period. - [Export and archiving](https://docs.getduezen.com/advanced/export-and-archiving.md): Export payment history as a CSV, understand what archiving does to an item, and restore an archived bill. - [Free trial tracker](https://docs.getduezen.com/advanced/free-trial-tracker.md): Track trial start and billing dates, receive escalating reminders at 7, 3, and 1 day, and decide to keep or cancel before you are charged. - [Savings goals](https://docs.getduezen.com/advanced/savings-goals.md): Create a goal with a target and date, log deposits and withdrawals, and see milestone celebrations at 25, 50, 75, and 100 percent. - [Your Journey](https://docs.getduezen.com/advanced/your-journey.md): A timeline of the moments you have earned in DueZen, with a one-time backfill for existing accounts. - [Categories and organization](https://docs.getduezen.com/core/categories.md): Built-in categories, how to create custom ones with their own colors, and how to re-categorize items directly from Fund Flow. - [Payment tracking](https://docs.getduezen.com/core/payment-tracking.md): Two ways to mark a payment, how undo works, what gets stored in history, and how to read the sparkline on a bill's detail screen. - [Quick Add](https://docs.getduezen.com/core/quick-add.md): Log a spend from any screen by holding the navigation bar. Merchant names auto-pull an icon, and duplicates are detected. - [Recurring bills](https://docs.getduezen.com/core/recurring-bills.md): The six recurrence intervals, how end dates auto-archive an item, and how to pause a subscription without deleting it. - [Reminders and notifications](https://docs.getduezen.com/core/reminders.md): Set how far ahead a reminder arrives, define quiet hours, and choose which of the 20+ notification types you want. - [Swipe gestures](https://docs.getduezen.com/core/swipe-gestures.md): Swipe left to mark a bill paid, swipe right to snooze it, and long-press to select several items at once. - [Add your first item](https://docs.getduezen.com/getting-started/add-your-first-item.md): How smart auto-fill works, and how to set the amount, due date, category, and recurrence for a new bill or subscription. - [Dashboard overview](https://docs.getduezen.com/getting-started/dashboard.md): What every section of the DueZen home screen shows, and how to reorder or hide sections to match your priorities. - [DueZen help center](https://docs.getduezen.com/index.md): Track bills, subscriptions, free trials, and savings goals in one place — without linking a bank account. Start here. - [Budgets and spending pace](https://docs.getduezen.com/insights/budgets.md): Set an overall monthly budget and per-category limits, and read the spending pace card and progress bars. - [Fund Flow](https://docs.getduezen.com/insights/fund-flow.md): Read the interactive donut chart, switch between Fund Flow and Flow Tracker, navigate months, and expand category cards. - [Payment history and reports](https://docs.getduezen.com/insights/history-and-reports.md): Filter and sort the History tab, jump straight to a month, and replay last month's Monthly Reflection. - [Celebrations and rewards](https://docs.getduezen.com/personalization/celebrations.md): The four kinds of celebration in DueZen — full-screen, mini-burst, money-saved, and quiet confirmations — and when each fires. - [Themes and appearance](https://docs.getduezen.com/personalization/themes.md): Twenty theme presets with light and dark variants, auto-dark scheduling, navigation tab order, and text size. - [Privacy and your data](https://docs.getduezen.com/privacy.md): DueZen requires no bank login and stores your data in encrypted device storage. What that means in practice, and what it costs you.