Chinese Language Apps:

Memrise:
IOS: https://apps.apple.com/us/app/learn-languages-with-memrise/id635966718
Android: https://play.google.com/store/apps/detailsid=com.memrise.android.memrisecompanion

Pleco:
IOS: https://apps.apple.com/us/app/pleco-chinese-dictionary/id341922306
Android: https://play.google.com/store/apps/details?id=com.pleco.chinesesystem

Duolingo:
IOS: https://apps.apple.com/us/app/duolingo/id570060128
Android: https://play.google.com/store/apps/details?id=com.duolingo

Busuu:
IOS: https://apps.apple.com/us/app/busuu-language-learning/id379968583
Android: https://play.google.com/store/apps/details?id=com.busuu.android.enc

Google Translate:
IOS: https://apps.apple.com/us/app/google-translate/id414706506
Android: https://play.google.com/store/apps/details?id=com.google.android.apps.translate

Bing Translate:
IOS: https://apps.apple.com/us/app/microsoft-translator/id1018949559
Android: https://play.google.com/store/apps/details?id=com.microsoft.translator