33CmHub

33CmHub is an expense-tracking application designed for managing personal income and expenditures, currency exchanges, and multi-currency accounts. The app features five main sections: Overview, Transactions, Currency Exchange, Analytics, and Management. For each entry, the original currency amount is preserved; users can manually input an exchange rate to calculate the equivalent value in their base currency. Transactions awaiting conversion still affect the original currency balance, and reports clearly highlight any records that have not yet been converted. The currency exchange function links the outgoing amount, the incoming amount, and any associated fees, ensuring that the principal amount is not categorized as an expense. Historical exchange rates are managed separately from the rates used for balance conversion; bulk conversions require a preview before confirmation, and all modifications to records remain traceable.

The application supports account archiving, customizable currency precision settings, various data visualizations (bar charts, donut charts, line graphs, and area charts), theme switching, a privacy lock, and local backup and restoration. All monetary calculations utilize decimal arithmetic with consistent rounding rules. Data is stored locally on the device, and the codebase is structured by functional modules to facilitate readability, ongoing maintenance, and future expansion.

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