iPhone 13 memory filling up, seeking cleanup app

There are no cleanup apps which can clean up an iPhone, to be honest. iOS is an encrypted, sandbox system which 3rd party apps can't really touch affectively. They can go in and make a mess of things, however.

If you're running out of space, you need to delete things you don't need or use, which can include: Photos, Videos, Music, Files, Apps, Messages, Email, etc.

Don't look for a shortcut, which at best may cause more issues than they can solve.

Read this --> Manage storage on iPhone - Apple Support

If you are running out of storage on your iPhone, you own an iPhone which doesn't have enough to meet your needs. Storage is one of the most important things on iPhone, yet is one of the most overlooked things people fail to consider when buying a new iPhone. Today, all new iPhones Apple sells come with 256GB minimum and even that may not be enough for most people. When you buy your next iPhone, buy one with the most storage you can afford. Not once has anyone come on this forum and said they have too much storage. But daily, people come here saying they don't have enough.

Some of apps Cache may take much storage and needs to renstall them like instagram

but u may see what files or or apps are heavy size and manage them.