Is Amazon Appstore safe for downloading apps?

Generally, yes: the Amazon Appstore is a legitimate marketplace operated by Amazon, and it is usually safe to download apps from Amazon’s official source or use it on Amazon devices.

A few important caveats:

• The store itself is not the same as every app on it — each app can still vary in quality and safety.
• If you install the Amazon Appstore on a non-Amazon Android device, you may need to enable the system’s “Install unknown apps” permission. That’s normal for sideloading, but you should only download the installer directly from Amazon.
• App selection is smaller than Google Play, and some apps may update more slowly.

So the short answer is: the Amazon Appstore is generally safe, as long as you use Amazon’s official download/source and stay cautious about the individual apps you install. As with any app store, exact app availability and policies can change, so it’s a good idea to check Amazon’s current official information if you’re deciding about a specific app.