The App Store lets you download purchased apps again, without having to pay for them again, thanks to its smart system. Apple sells its iOS apps for a lifetime, so you can buy them anytime and anywhere. Apple’s iCloud and App Store synchronization lets you easily re-download paid apps you’ve used in the past for free. Your App Store apps are automatically stored in your iCloud online storage, allowing you to access them from your iPhone or iPad App Store anytime you need them.
Here are the Steps for Downloading or re-downloading the purchased App Store app after uninstalling or removing it from the iPhone and iPad again from the App Store.
Useful also: How to change app icon size in iPhone, iPad – Resize app icon.
How to Re-download Apps Already Purchased from App Store on iPhone and iPad
1. Launch the App Store on your iPhone and iPad.
2. Click on the profile icon at the top right corner of the iPhone screen.

3. From the list of options, you have to tap on Purchased.
4. Tap on “My Purchased“.

5. Here, you can see all apps in two different categories; one is All, which means installed or used in the current device. The second is Not on This iPhone/ Not on This iPad.
6. Under this tab, you can see all apps with a cloud icon, which means you can get it from the App Store anytime.
7. Tap on it to re-download from the App Store.

Or
If you have a problem finding the app, then you have a search option to find it easily from this list. The search option is at the top of all the apps list.
Now you are done, you can use purchased apps any time from the App Store.
Enjoy your old paid apps! If you deleted any, you can download them again from the App Store. Let us know if you need help finding a particular app.