Currently, I use Google Sheets for tracking expenses and investments. There are two files, one for tracking expenses and the other is for investments.
I track my daily expenses in a sheet. A sheet is indicated the month and the year. Once I spend the money I input the expense soon to prevent from forgetting. It's simple. A table with a category expense, detail expense, and the amount. This is something that I want to do because this habit can make me understand how I spend my money. I mean do I appreciate the money?
For investments, a sheet is indicated a category of investments. Stocks, bonds, and mutual funds, for example. I also use a simple table to track what I buy or sell. By the way, Google Sheets has a GOOGLEFINANCE formula [0] that is very usefull for getting the price of a stock.