FinTrack

A local-first CLI financial tracker written in Rust. Track your income and expenses on your own machine, with zero cloud dependencies and complete data ownership.

Why FinTrack?

• Your data stays yours. Everything is stored locally in ~/.fintrack/. No remote servers, no accounts, no privacy concerns.
• Simple and fast. Lightweight CLI tool that gets out of your way.
• Reliable. Simple and robust data storage ensures your data is safe.
• Transparent. Open-source and easy to inspect. All your financial data is in human-readable JSON.

Installation

Using Cargo (Recommended)

If you have Rust installed, install FinTrack directly from crates.io:

cargo install fintrack

Then verify installation:

fintrack --version

From Source

To build from source, you'll need Rust 1.70+. Install Rust here.

git clone https://github.com/steph-crown/fintrack.git
cd fintrack
cargo install --path .

Then verify installation:

fintrack --version

Quick Start

1. Initialize Your Tracker

fintrack init -c NGN

Or with opening balance:

fintrack init -c NGN -o 1000.00

This creates ~/.fintrack/tracker.json and sets your currency. Supported currencies: NGN, USD, GBP, EUR, CAD, AUD, JPY.

Flags:

• -c, --currency (optional) – Currency code, defaults to NGN
• -o, --opening (optional) – Opening balance, defaults to 0.0

2. Add Your First Record

fintrack add Income 4000 -s Wages

Or using long flags:

fintrack add Income 4000 --subcategory Wages

With description and date:

fintrack add Expenses 150.50 -s Groceries -d "Weekly shop" -D 28-12-2025

Arguments:

• category (positional, required) – Income or Expenses
• amount (positional, required) – Positive number
• -s, --subcategory (optional) – Defaults to "miscellaneous"
• -d, --description (optional) – Any text
• -D, --date (optional) – Format: DD-MM-YYYY, defaults to today

3. View Your Data

fintrack list

See totals:

fintrack total

Filter by date range:

fintrack list -S 01-12-2025 -E 31-12-2025

Filter by category or subcategory:

fintrack list -c Income
fintrack list -s Groceries

View first or last N records:

fintrack list -f 5   # First 5 records
fintrack list -l 10  # Last 10 records

List flags:

• -f, --first N – Show first N records
• -l, --last N – Show last N records
• -S, --start DATE – Start date filter (DD-MM-YYYY)
• -E, --end DATE – End date filter (DD-MM-YYYY)
• -c, --category CATEGORY – Filter by category
• -s, --subcategory NAME – Filter by subcategory

4. Manage Categories

View all categories:

fintrack category list

Note: Categories (Income, Expenses) are immutable and cannot be created, deleted, or renamed.

5. Manage Subcategories

View all subcategories:

fintrack subcategory list

Add a new subcategory:

fintrack subcategory add Utilities

Delete a subcategory (only if it has no records):

fintrack subcategory delete Utilities

Rename a subcategory:

fintrack subcategory rename Groceries Food

Subcategory commands:

• list – View all subcategories
• add <NAME> – Create a new subcategory
• delete <NAME> – Delete a subcategory (must have no records)
• rename <OLD> <NEW> – Rename a subcategory

6. Update or Delete Records

Update a record by ID:

fintrack update 5 -a 200 -d "Revised amount"

Update arguments:

• record_id (positional, required) – Record ID to update
• -c, --category CATEGORY (optional) – New category
• -a, --amount AMOUNT (optional) – New amount
• -s, --subcategory NAME (optional) – New subcategory
• -d, --description TEXT (optional) – New description
• -D, --date DATE (optional) – New date

Delete records by ID(s):

fintrack delete -i 5
fintrack delete -i 1,2,3  # Multiple IDs

Delete all records in a category:

fintrack delete -c Expenses

Delete all records in a subcategory:

fintrack delete -s Groceries

Delete flags (one required):

• -i, --ids ID1,ID2,... – Delete by record IDs
• -c, --by-cat CATEGORY – Delete all records in category
• -s, --by-subcat NAME – Delete all records in subcategory

7. Explore Your Data

Get a summary with exploratory data analysis:

fintrack describe

This shows:

• Total records
• Date range
• Records and totals by category
• Top 5 subcategories by total
• Average transaction amount

8. Export Your Data

Export to CSV:

fintrack export ~/Downloads -t csv

Export to JSON:

fintrack export ~/Downloads -t json

Export arguments:

• path (positional, required) – Directory where file will be created
• -t, --type TYPE (optional) – File type: csv or json (defaults to json)

Files are named: fintrack_export_YYYY-MM-DDTHH-MM-SSZ.{csv|json}

9. Other Commands

View raw JSON data:

fintrack dump

Clear all data:

fintrack clear

Common Commands

Task	Command
Initialize tracker	fintrack init -c NGN
Initialize with opening	fintrack init -c NGN -o 1000
Add record	fintrack add Income 4000 -s Wages
Add with description	fintrack add Expenses 150.50 -s Groceries -d "Weekly shop"
Update record	fintrack update 5 -a 200 -d "Updated"
List all records	fintrack list
List first 5	fintrack list -f 5
List last 10	fintrack list -l 10
Filter by category	fintrack list -c Income
Filter by date range	fintrack list -S 01-12-2025 -E 31-12-2025
View totals	fintrack total
Delete record by ID	fintrack delete -i 5
Delete multiple IDs	fintrack delete -i 1,2,3
Delete by category	fintrack delete -c Expenses
Delete by subcategory	fintrack delete -s Groceries
View categories	fintrack category list
View subcategories	fintrack subcategory list
Add subcategory	fintrack subcategory add Shopping
Rename subcategory	fintrack subcategory rename Old New
Delete subcategory	fintrack subcategory delete Shopping
Describe data	fintrack describe
Export to CSV	fintrack export ~/Downloads -t csv
Export to JSON	fintrack export ~/Downloads -t json
View raw JSON	fintrack dump
Clear all data	fintrack clear
Get help	fintrack help

Data Formats

Dates: DD-MM-YYYY (e.g., 30-12-2025)

Amounts: Positive numbers only (e.g., 4000 or 150.50)

Names: Alphanumeric, start with a letter (e.g., "Groceries", "Utilities_Bill")

Data Storage

All your data is stored locally:

~/.fintrack/
├── tracker.json           # Your financial data
└── backups/               # Directory for future backup functionality

You can safely back up the entire ~/.fintrack/ directory to protect your data.

Data Safety

You can view your current data anytime:

fintrack dump

This pretty-prints your tracker.json to the terminal.

Note: Automatic backups are not currently implemented. It's recommended to manually back up your ~/.fintrack/ directory periodically.

Examples

Track Monthly Income and Expenses

# Add monthly salary
fintrack add Income 50000 -s Wages -D 01-12-2025

# Add rent
fintrack add Expenses 20000 -s Housing -D 01-12-2025

# Add groceries
fintrack add Expenses 5000 -s Groceries -D 10-12-2025
fintrack add Expenses 4500 -s Groceries -D 20-12-2025

# View summary
fintrack total

# See expenses by category
fintrack list -c Expenses

Review Last Week's Spending

fintrack list -l 7

See Income for the Year

fintrack list -c Income -S 01-01-2025 -E 31-12-2025

Correct a Mistake

fintrack list -l 5        # Find the wrong record
fintrack update 42 -a 300  # Correct it

Analyze Your Spending

fintrack describe

This provides insights like:

• Total records and date range
• Spending breakdown by category
• Top subcategories
• Average transaction amount

Keyboard Shortcuts & Tips

• Use fintrack help to see all available commands
• Flag order doesn't matter: -c Income -a 4000 is the same as -a 4000 -c Income
• Category and subcategory names are case-insensitive (use "wages", "Wages", or "WAGES"—all work)
• Dates default to today if not specified
• Descriptions are optional but helpful for future reference
• Use fintrack describe to get insights into your spending patterns

Troubleshooting

"Tracker already initialized"

You've already run fintrack init once. If you want to start fresh, run:

fintrack clear

Then fintrack init again.

"Subcategory does not exist"

View all available subcategories:

fintrack subcategory list

Then use the exact name from the list.

"Cannot delete subcategory—it has X records"

You must delete all records in that subcategory first, or delete the subcategory and all its records at once:

fintrack delete -s Groceries

Data seems corrupted or missing

Run:

fintrack dump

to inspect your data. If something is wrong, you may need to restore from a manual backup or start fresh with fintrack clear and fintrack init.

Future Features

Coming soon:

• PDF Export: Export your data to PDF format
• Shell Autocompletion: Tab-complete commands and category names
• Configuration file: Customize defaults and display preferences

Contributing

Found a bug? Want a feature? Open an issue or pull request on GitHub.

License

MIT License. See LICENSE file for details.

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Want to Know More?

Interested in the technical design and architecture decisions behind FinTrack? Check out the Design Document for a comprehensive deep-dive into how the tool is built, including data structures, error handling, and the reasoning behind each decision.

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Get started now: fintrack init -c NGN