KoBoToolbox is building its forms using a widely shared standard called XLSForm. XLSForm makes it possible to create very complex electronic forms in Excel (or any other spreadsheet program).

All forms created with KoBoToolbox can be imported from or exported to XLSForm files. This means they are fully compatible with other related tools such as ODK or Formhub.

Editing a form in Excel can be an easy way to quickly make several changes to a form (for example for translating an entire form).

The XLSForm format is wonderfully documented on xlsform.org.

When using XLSForm you can create complex calculations as referenced in this article

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