"Cells And Columns"
Microsoft Excel is the official Excel application now available for free for iOS devices.
However, you need to keep in mind that the app requires an Office 365 profile in order to work in all the devices, so first of all, you should create an account if you still don't have one.
Afterwards, you can easily begin to create new documents and synchronize them across all your devices.
As you will see, the design of the app is extremely aesthetic and intuitive, presenting responsive controls and the classic appearance you already know from using the desktop version of the popular software.
You can expect all usual features in this mobile app: formulas, tables, charts, comments and everything you need. Also, perfect synchronization, as it always know where you were working when you open it again.
If you were worried about group projects, you don't have to rack your brains anymore: Microsoft supports working simultaneously on the same project and easy sharing with others.
Microsoft Corporation is the developer of these mobile releases for the popular Microsoft software.