Multi-platform online spreadsheet solution

*I wasn't sure which forum to put this in.

Right now I am using Google Sheets to keep track of an online spreadsheet that I am working on. I'm using the spreadsheet to track sales and expenses of a small business I run.

So far it seems to be working well on my PC at work, and my MBP at home. However, the iPhone experience isn't the greatest.

Is there a different, free online spreadsheet application that might work better across these three platforms?

 

Thanks for the suggestions, and for moving the thread to the proper forum!