The Kids Memory Game app does not use or track any data on you. If you use the full version, the app does not have access to the internet and all data are downloaded locally. If you use the lite version, the app has access to the internet and downloads data from https://github.com. The requests are subject to their own privacy policy, typically they'd log you IP address or similar. If you use the Google Play version, the app itself doesn't have access to the internet but additional data (theme packs) may be downloaded by Google Play Services, subject to their own privacy policy.