In what ways is using an app better than using a CGM?
Do some of these apps integrate with a CGM to automatically ingest data from them?
Using an app is different from using a CGM. It doesn't say in the FAQ if Glucosio parses data from a CGM, but it does say Glucosio takes input from your glucose monitor and outputs graphs and suggestions.
Is there an iOS version?
In the article - they're next step is launching their API and iOS version. I certainly hope they're using HealthKit and CareKit.