This is a great method to increase traffic, gain exposure and have social proof! There are several platforms where you can get “an award” for your app! We recommend you to sign up to these pages: BestMobileAppAwards, GlobalMobileAwards, AppGrowthAwards2019, DrivenxDesign, and MobileVillage
Regardless of whether you win or lose you will get the recognition anyways! You can get a badge you can include at the bottom of your webpage!