Feature Management for Mobile

[MichaelLHerman]

We are using Feature Management for both web and mobile.

It would be helpful if we could segment wether a feature is enabled based on user OS (Android vs iOS) and based on application version (to turn on a feature only after a specific version). We are already using groups to segment users by client organization, so we can't reuse groups as far as I know, unless a user could be in multiple groups ("ClientX", "Android", "1.0.2")? Also support for version ranges would be good, as there'd be no way to do that in the current UI

[zhiyuanliang-ms]

Hi, @MichaelLHerman Thanks for reaching out.

May I know the programing language of the Feature Management library you are using? Are you using targeting feature filter?

It would be helpful if we could segment wether a feature is enabled based on user OS (Android vs iOS) and based on application version (to turn on a feature only after a specific version). We are already using groups to segment users by client organization, so we can't reuse groups as far as I know, unless a user could be in multiple groups ("ClientX", "Android", "1.0.2")

Currently, you can use a custom feature filter to do this. A .NET example of custom feature filter which enables feature flag based on the browser type can be found here.

Another workaround is that you can give all users a version tag(group) and exclude all the versions before the specific version in the targeting filter settings.

[MichaelLHerman]

@zhiyuanliang-ms
Using ASP.NET backend which uses Microsoft.FeatureManagement, passing along a list of enabled features to the user in an API call upon login.

Thanks, will look into a custom feature filter that parses a custom User-Agent string that will include app version and platform

Can you confirm that custom feature filters use an AND condition? If I have multiple custom feature filters on a feature flag, they must all evaluate to true for the feature to be on?

Edit: I see that a "Require all above feature filters to be enabled" checkbox appears when I add more than one, seems like the default is OR and checked represents AND. I think this could be added to the feature filter documentation you shared.

[juniwang]

Hi @MichaelLHerman you are correct it is OR by default. Checking the checkbox enables AND evaluation. You can check this document for more information: https://learn.microsoft.com/en-us/azure/azure-app-configuration/feature-management-dotnet-reference#requirement-type