The App has been developped with Excel 2016.
It have it's extension in xlsx,
That means that is compatible from Excel 2007 to Excel 2016.
There is No VBA Macro too !
So you can't messed up the cells by wrong manipulating it !
Unlike others Managers, I partially lock the file with a password so you are not "free" in the file.
It's great because you can't messed up the work, but it's frustrating to not see the formulas and be forced to modify the typing zones.
I tried to port it in Google Sheets, but unfortunately, there is some bugs and unexpected errors ...
That's why I'm always talking about Excel, since everyone (or most of people) have it installed. Everyone will be able to use it.
I didn't tried on OpenOffice or any Free Open Source Office program.
/!\ Be warned ! /!\
See How it Works in the DOWNLOAD Section
Compatible
Excel 2007/10/13/16
Reliable / Protected
User Friendly Interface
Reliable
User Friendly Interface
No VBA Code