Good Value. Performs Well.
This spreadsheet program is pretty powerful and easy to use. Certainly well worth the $1 I paid for it. My 5 star rating is based on what it does for what it cost. I found it to be stable on my IPad 3rd gen. Entering formulas and formatting was easy. I consider myself to be an Excel power user - this obviously isnt Excel but it is pretty darn good as a handy iPad spreadsheet tool considering its low price. I have not yet attempted to import any of my spreadsheets from Excel into it yet so cant comment on that feature yet. I had no problem emailing it out.
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Calc XLS Spreadsheet, v3.7.0