Apple's newest update for WhatsApp allows iOS users to set it as the default calling and messaging app.Users can make WhatsApp their default app by going to Settings > Apps > Default Apps and selecting WhatsApp for both messaging and calling.This update will be a convenient quality-of-life improvement for many users who prefer using WhatsApp over Apple's first-party options.Apple also recently implemented the option to change the default navigation app on iOS, but it's currently limited to the European Union.