Below is a listing of AWS certification exam quiz apps for all platforms:
AWS Cloud practitioner FREE version:
IOS: https://apps.apple.com/ca/app/aws-certified-cloud-pract-prep/id1488832117
Microsoft/Windows10:https://www.microsoft.com/en-ca/p/aws-certified-cloud-practitioner-exam-preparation/9ns1xttj1d5s
Google play: https://play.google.com/store/apps/details?id=com.awscloudpractitonerexamprep.enoumen
Amazon App Store (Android): https://www.amazon.com/dp/B085MFT53J/ref=mp_s_a_1_2?keywords=cloud+practitioner&qid=1583633225&s=mobile-apps&sr=1-2
Web/PWA: https://aws-cloud-practitioner-exam.firebaseapp.com
AWS Solution Architect FREE version:
Google Play (Android): https://play.google.com/store/apps/details?id=com.awssolutionarchitectassociateexamprep.app
iOS: https://apps.apple.com/ca/app/solution-architect-assoc-quiz/id1501225766
Pwa: https://awscertifiedsolutionarchitectexamprep.com
Amazon android: http://www.amazon.com/dp/B085MG99H9/ref=cm_sw_r_tw_awdm_xs_pqfzEb4HSYJV1
Microsoft/Windows10: https://www.microsoft.com/en-ca/p/aws-certified-solution-architect-associate-exam-prep/9ncch3cgskmp
AWS Cloud Practitioner PRO Versions:
ios: https://apps.apple.com/ca/app/aws-certified-cloud-pract-pro/id1501104845
Android google : https://play.google.com/store/apps/details?id=com.awscloudpractitonerexampreppro.enoumen
Amazon android: https://www.amazon.com/dp/B085HGKRMG/ref=pe_385040_118058080_TE_M1DP
Microsoft/Windows 10: https://www.microsoft.com/en-ca/p/aws-certified-cloud-practitioner-exam-preparation-quiz-pro/9phhz236gh4d
AWS Solution Architect PRO versions:
Ios: https://apps.apple.com/ca/app/solution-architect-assoc-pro/id1501465417
Android google: https://play.google.com/store/apps/details?id=com.awssolutionarchitectassociateexampreppro.app
Windows10: not available yet
Amazon android: https://www.amazon.com/dp/B085HR898X/ref=pe_385040_118058080_TE_M1DP