by luccazade



A web app to help manage personal finances.

Dashboard - Desktop Outgoings - Mobile


I was looking for a project to improve my (non-existent) HTML and CSS knowledge and so I built this web app to replace a number of spreadsheets I was using to track my own personal finances. It also gave me an opportunity to explore SQL Alchemy and Jinja templating.

It was designed with the following methodology in mind.

  1. Salary is paid monthly and not used until the end of the month.
  2. On the last day of the month, enough money to cover all monthly outgoings is paid into the account from which they are taken.
  3. The remaining balance (expandable income) is saved and then withdrawn weekly (on the same day every week) throughout the month.


  • Track monthly outgoings and ensure enough money is saved to cover them all.
  • Record and save for Annual Expenses - Link a monthly outgoing to your annual expenses so that the money is saved and ready when needed.
  • Record savings accounts and pensions to get a total of all savings.
  • Link an outgoing to a saving to increase the savings account balance by that amount each month.
  • Create "self loans" allowing you to borrow from savings and create a re-payment plan.
  • Salary Calculation (UK) - Calculate net salary and see tax, NI and pension breakdown.
  • Starling Bank Integration - See your main account and savings goal balances on the dashboard.
  • Multiple User Support - Multiple users can each have their own password protected set of data.
  • Mobile Responsive.

Change Log


  • Bumped starlingbank version.


  • The "Future Spending Money Savings" total now includes next months savings on the last day of the month. This helps when doing the banking on the last day.


  • Removed cryptography dependency. If updating from before this date a password change may be required.


  • Added files required to easily deploy to Heroku.
  • Added ability to create a user or change a users password using environment variables (useful for easy Heroku deployment).


  • Fixed an issue loading existing Weekly Pay Day config.
  • Passwords are now hashed before storage.
  • Delete warnings now include the name of the item being deleted (for confirmation).


  • Fixed session expiry.


Heroku Deployment

The easiest way to run your own version of BlueSheet is to click the button below to deploy it to Heroku. They offer free accounts which have some limitations but should easily suffice for general use.


Once deployed, to update to the latest verion you can do the following:

  1. Download and install Git if you don't have it already.
  2. Download and install the Heroku CLI Tool if you don't have it already.
  3. Open a terminal / command prompt.
  4. Login to Heroku using: heroku login
  5. Clone your existing deployments source code: heroku git:clone -a <your app name> (where "<your app name>" is what you called BlueSheet on Heroku). Note: You may get a message to say that you have cloned an empty repository, this is ok.
  6. This will have created a directory with the same name as your app. Nagivate to that directory: cd <your app name>
  7. Link this repository: git remote add source
  8. Download the latest source code from the linked repo: git pull source master
  9. Push the latest source code to your app: git push heroku master
  10. You can now delete the directory that was created if required.

Other Deployment Options

Alternatively this is a flask python app so can be deployed in a number of different ways. I personally run this in a Docker container using Gunicorn. This is then served by Caddy Web Server.

The following environment variables need to be set for the app to run:


Both should be strong passwords. Note: These will be automatically generated if deploying to Heroku.

You can also optionally set a DATABASE_URL environment variable which can be any SQL Alchemy connection string. This will default to sqlite:///database.db (a SQLite database stored in a location relative to where the applicant is run) if not specified.

Note: The Heroku deployment will automatically setup a PostgreSQL database and fill in the DATABASE_URL accordingly.

Admin CLI is a command line tool allowing you to add users, unlock user accounts and change passwords.

Alternatively you can also set USERNAME and PASSWORD environment variables. When the app is fist launched, if the declared user already exists the users password will be updated, if not a new user will be created.

Add a user

python /path/to/ add-user -u -p MyS3curePwd!

When the user first logs in they will be taken to the configuration page.

Unlocking a user account

If a user enters an incorrect password more than 3 times in a row their account will be locked, to unlock an account you can run the following:

python /path/to/ unlock-user -u

Changing a users password

To change a users password you can run the following:

python /path/to/ change-password -u -p My0t4erS3curePwd!