Honestly for one unit, just download some Google sheets template and be done.

You can even download a template online and modify it to your own style.

I am also interested in hearing from others if forcing tenants to download an app is a large barrier?

Does anyone know how I can share files so that I can make it available for download?

It is not intended to appear seamless. 

You can link to bank accounts, have multiple businesses, tag expenses, track mileage (it will let you decide if it's personal or business), download P&Ls and other reports. 

My question, however, is which program or application have you found that is the simplest in terms of being seamlessly work across multiple devices?

Pixlr is becoming one of my favorites when I am unable to use Adobe It is like Photoshop with some of the same functionality, but it can be run on the web instead of downloading the application.

I've just downloaded the guide and will read it soon. 

With online banking today, a defacto budget can be seen by, downloading all transaction from the first of the month to the last day of the month, eg Jan-1 thru Jan-31 in CVS format.double-click on the file and you get a spreadsheet.annotate each line by the kind of expenditure it is: {cash, food, utils, car, internet, entertainment,...}select the column with your annotations and sort ascending, extend the selection.If you know Excel, insert a line between the groupings, and SUM() the values of each groupwhoola!