ageledger 

A neutral .NET API over Google Play Age Signals (Android) and Apple's Declared Age Range (iOS): the age range the platform shares, requestAgeRange, isEligibleForAgeFeatures, requiredRegulatoryFeatures and... More information

Test doubles for Ageledger: fake Android and Apple backends for unit tests that run on plain .NET, with no device and no platform SDK. For tests only; do not ship it in an app.