Other "Competitor" apps - Pasarus/FelineAdoptionAgencyMajorProject GitHub Wiki

Pets Adoption: Adopt Dog, Cat or Post for Adoption

https://play.google.com/store/apps/details?id=ppapps.petsapp&hl=en

Pets Adoption: Adopt Dog, Cat and Other Pets

https://play.google.com/store/apps/details?id=com.SelfappDeveloper.AdoptDog&hl=en

• Contains a very nice material design theme, and implementation.

Appets - Adopt a pet

https://play.google.com/store/apps/details?id=co.applist.appets&hl=en

Pet Adoption UK

https://play.google.com/store/apps/details?id=uk.co.petadoptionuk.petadoptionuk&hl=en

General pet apps that span multiple agencies is actually quite common, no single agency apps available for Cats protection, RSPCA etc.