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Custom features are those defined by you while creating an application, as they are custom feature names of the feature will be prefixed with instance prefixID.
Feature type
Checkbox:
A checkbox is a boolean type of feature type it will store value in a boolean format i.e true or false. That means if the checkbox value is true then we will get to know users have access to that particular feature and if the checkbox value is false then we will get to know the user has no access to that particular feature.
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The number type of feature indicates the number of APIs can a user use using that feature. For example, the user to which this feature's license is assigned can consume n APIs per day, after that he will get an error that his allocated amount is exhausted.
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