: The 5s often has limited space (16GB or 32GB). Go to Settings > General > iPhone Storage to see what you can delete to make room.
If an app (like YouTube or certain social media) is completely unsupported even via the "Purchased" trick: Open . Go to the service's website (e.g., youtube.com).
Select . This creates an icon that works similarly to a lightweight app. Important Tips for iPhone 5s
If the app still supports iOS 12, the process is straightforward: Open the on your iPhone. Tap the Search icon (magnifying glass) at the bottom right. Type the name of the app and tap Search . Tap Get or the Cloud icon to download. 2. How to Download "Incompatible" Apps
: Downloading and running apps on older hardware drains the battery quickly. Keep your charger handy during the setup process.
Downloading apps on an iPhone 5s today can be tricky because its last supported operating system is . Many modern apps now require iOS 13, 14, or higher. 1. The Standard Way (App Store)