Amazon Appstore, a mobile appstore for Android devices operated by Amazon, is one of the most popular Android appstores except Google Play. However, it is reported that the Amazon Appstore itself and ...

For recent Android versions, go to Settings > Apps. Then, select the app if it's in the recently opened apps list or select ...

The Discord desktop app automatically checks for updates when you open it, but you'll have to use your phone's app store to update the mobile app.

To update Slack, you'll likely need to go to your system's App Store. Only Windows users can update from within the app.