Not all apps that are on the Apple Store and Play Store are legit. There are a lot of scam apps and clone ones that are available for download there, and if you are not careful enough, you will fall victim to using those apps.
I don't even know the kind of security check the security team of those stores carries out on the apps before they approve it and make it available for public download, or they don't even run those checks until they are being reported by scammed customers.
Apple Store is better than Google Play because you will find more fake applications on Google Play than on Apple Store.
Importantly you can not rely on either Apple Store or Google Play and their works to be safe for your devices and funds. You must proactively secure your devices and fund, so let's start with official websites of exchanges, wallet softwares on which you can find official links to their application download links.
Never start with Searching on either Apple Store or Google Play when you need to find and download any application.