Thank you for reaching out. I can certainly understand the concern of which device would be compatible with your A13 and I would be happy to give your a resource with further information. The Galaxy Wearable app is the core for everything related to your Samsung smartwatch. However, this app is only available on your phone, which means you need to connect your watch and phone together. Samsung watches are only compatible with certain Android and iOS phones - make sure your phone is compatible before you try setting up your watch.
Note: Your device may not be compatible depending on the region, carrier, or model.
Give this link a try for all the specifications and requirements for all of our Samsung smartwatches, and then you can compare the watches and find the best fit for your needs: https://www.samsung.com/us/support/answer/ANS00082502/
