Bag: Bitcoin Portfolio Monitor is a lightweight, privacy-first Android app that helps users track only Bitcoin holdings and see net worth in real time without creating an account. Designed for people who prioritize self-custody, Bag: Bitcoin Portfolio Monitor keeps all wallet information and DCA records on the device, offers optional watch-only support and Tor routing as part of an optional one-time purchase, and presents balances across up to three fiat currencies so you can view value where it matters most.
The app focuses on a compact set of tools built around Bitcoin tracking: enter balances manually or add watch-only addresses to aggregate on-device totals, view live BTC prices in multiple fiat currencies, and inspect historical charts with ranges from 1 day up to 5 years and all-time. A dedicated DCA tracker lets you log purchases and calculate your cost basis and profit & loss over time. The home screen widget can be pinned for instant access to live price and portfolio net worth, and the optional privacy tier (one-time purchase) adds watch-only zpub support, Tor routing for network privacy, configurable alerts and always-on monitoring for addresses or xpubs.
User interaction in Bag: Bitcoin Portfolio Monitor is intentionally simple and touch-driven. Add a balance or watch-only address through the entry screen, edit entries by tapping an item, and reorder holdings with drag-and-drop gestures. Charts respond to pinch-to-zoom and tap-to-inspect so you can examine price points, volume indicators and percentage changes. The main dashboard surfaces current net worth and 24-hour change with quick access to the DCA ledger, alerts, and widget configuration. Notifications and alerts are configurable through clear on-device settings rather than requiring cloud accounts.
Historical charts in Bag: Bitcoin Portfolio Monitor are designed to help you follow price progression and evaluate strategy over time. Timeframes include 1D, 1W, 1M, 1Y, 5Y and ALL, and the DCA tool records individual buys so the app can compute average cost basis and realized/unrealized P&L. This approach creates a basic progression system for portfolio tracking: record transactions consistently, review moving averages and chart ranges to spot trends, and use the alerts feature to stay informed of price movements relative to your cost basis.
The interface prioritizes clarity with a minimal, readable layout: a dashboard card for net worth, a list view for individual balances, and full-screen charts for deeper inspection. Color and contrast options are available for better readability, and the home screen widget can be resized and configured to show either a single primary balance or an aggregated net worth in the selected fiat currencies. The app avoids animated clutter to keep focus on numbers and chart data, which is valuable for quick checks during the day.
Bag: Bitcoin Portfolio Monitor provides ongoing utility rather than game-like replayability: it becomes more valuable the more you use it to log transactions, track DCA performance, and refine alerts. Regular use builds a transaction history and cost-basis picture that helps inform future buying or hodling decisions. The app receives updates focused on privacy improvements, UX refinements and support for additional fiat currencies as needed, keeping the experience useful over time.
Accessibility features include readable typography, adjustable contrast and straightforward navigation to support a broad range of users. Because all wallet and transaction data is stored locally, the app can display cached balances and charts when a network connection is unavailable, although live price updates require connectivity. Backups of the app data rely on device-level tools rather than cloud sync; this was a deliberate tradeoff to avoid storing sensitive wallet metadata on external servers.
Privacy is a core design decision: Bag: Bitcoin Portfolio Monitor does not require accounts, does not collect personal data, and keeps information on the device. The optional one-time purchase tier adds advanced privacy features such as Tor routing and watch-only zpub support for users who want additional protections. Limitations are clear by design — the app is Bitcoin-only and does not support other cryptocurrencies, there is no cloud sync or account-based backup, and certain advanced monitoring options are gated behind the single purchase rather than included in the free tier.
The project is open source and maintained by independent developers who publish the codebase for audit and community contribution. This transparency allows technically minded users to verify behavior and builds. The team focuses on a focused feature set that supports self-custody users and prioritizes privacy, simple controls and predictable, local data storage rather than integrating broad exchange features or multi-asset portfolios.
