Short answer: in a real storage emergency, manual cleanup wins when the obvious fix is tiny and immediate. A cleaner app wins once the problem is broad enough that finding duplicates, screenshots, heavy videos, or mixed clutter manually would take too long.
The key difference is not control. It is speed with enough decision quality. When the phone is full and you need room quickly, the wrong move is spending ten minutes deleting small files while the real storage hogs are still hidden inside grouped media.
When manual cleanup is enough
You only need a little space to complete one immediate task.
The clutter is clearly one category you can open and clear fast.
You already know exactly which files or videos are the biggest problem.
When a cleaner app becomes better
The phone is full because several clutter categories piled up together.
You need grouped review for duplicates, similar shots, screenshots, or large videos.
The real bottleneck is finding the best deletion candidates fast enough.
Manual scrolling would create too much review fatigue under time pressure.
What usually frees space fastest
The fastest wins usually come from heavy and low-risk categories first: large videos, screenshots, downloads, old attachments, and obvious repeated media. The best workflow is the one that gets you to those categories fastest without turning the process into guesswork.
If you want the broader commercial comparison, open best phone cleaner apps. If you want the deeper workflow tradeoff, continue to Cleanor vs Manual Cleanup.
In a storage emergency, the best tool is the one that gets you to the biggest safe wins before the warning blocks what you need to do.