Based on the search results, it seems the AIWA Smart Band - ASB-40 synchronizes with apps. It is available for R199 from one seller and R298 from another. This is a very affordable smart band that allows you to view notifications from your phone right on your wrist. While I don't have specific details on exactly which apps it pairs with, smart bands in general often synchronize with messaging, fitness tracker, and other health and lifestyle apps. Hopefully this gives you an idea of options to check out within your budget that may meet your needs. Let me know if you have any other questions!
