How Broomie Decides What Is Safe to Clean on Your Phone

Phone cleaners have a reputation, and most of it is earned. Red warnings, huge junk numbers that come back an hour later, and the occasional "it deleted my photos" review. When we built Broomie, the first question was not what to find. It was how a cleaner should decide what it is allowed to touch at all. This post walks through the rules Broomie follows.

What actually counts as junk on Android?

We use one test: could Android or an app rebuild this file without you losing anything? If yes, it is junk. If no, it belongs to you, however large or old it is.

That test gives a short, clear list. Thumbnail caches, which the gallery makes again the next time it shows a picture. Logs and temp files that apps leave behind. The LOST.DIR folder, empty folders, and saved bug reports. Installer files for apps that are already on the phone. And app caches, which we come back to below.

Everything else, such as photos, videos, downloads, chat media and documents, is yours. Broomie can show it to you, sorted by size, but it never calls it junk. A ten-gigabyte video is not junk because it is big. It might be the only copy of something that matters.

Why does every item come with a reason?

Because a number on its own asks you to trust the app. A reason lets you check it.

Each item Broomie lists carries a short line that says why it is there: a thumbnail cache, an unfinished download, a log an app wrote, an installer for an app you already have. If a reason does not match what you know about your phone, untick the item. You know your files better than any scan does.

The numbers are honest too. Every size is measured on your phone, and every clean is written to a history that shows what went, when and how much. There are no made-up totals and no fake memory cleaning. If you want to see where your space went before you clean anything, our guide on how to free up storage on Android walks through the built-in tools first.

Why does Broomie never delete without asking?

A cleaner sees file names and sizes. It does not know which screenshot is a boarding pass or which voice note is from someone who is gone. So Broomie scans, explains and waits. Nothing is removed until you look at the list and confirm.

Behind that confirmation there are a few more rules, and they exist because each one closes a way a cleaner can hurt you:

• Protected means protected. You can protect any file, folder or app, and Broomie skips it from then on. If Broomie cannot read your protected list for any reason, it refuses to clean at all instead of guessing.
• One copy is always kept. When you remove duplicates or similar photos, a set always keeps one, the sharpest shot by default. Exact duplicates are matched by their full content, not by name.
• Shortcuts are not followed. A link inside a folder can point somewhere else on the phone. Broomie never follows one while scanning or deleting.
• Leftovers near chat media wait for you. Power mode can find folders left behind by apps you uninstalled. The ones in the folder where chat apps keep their media are never preselected, because that is where your photos from chats live.
• The weekly clean has a short list. Scheduled cleaning, part of Pro, only touches junk, empty folders and caches. Your own files are never part of it.

What is Recently deleted for?

People make mistakes, especially when tidying hundreds of photos at once. So Broomie splits every clean in two. Caches and junk, which can be rebuilt, are deleted. Your own files are moved to Recently deleted, a hidden folder on the same storage, instead of being erased.

They stay there for 3 days, or up to 30 days with Pro. A wrong tap takes one tap to undo. If a file cannot be moved there, Broomie leaves it where it is and reports it as not cleaned, rather than deleting it outright.

This matters more than any feature on the list. The worst thing a cleaner can do is cost you something you cannot get back, and a short safety net makes that very hard to do.

What is cache, and why is clearing it not magic?

Cache is data an app keeps so it does not have to fetch or work out the same thing twice: image previews, map tiles, parts of videos, pages you opened. It is there to save time and data.

When you clear it, the space comes back at once, and the app starts filling it again the next time you use it. Usually that is fine. It just means the next launch may be a little slower and download a little more. Our guide on how to clear cache on Android shows how to do it per app with no extra app at all.

So clearing cache is useful when storage is tight, because Android and app updates need room to install. It is not a way to make a phone faster, and we say so plainly. Broomie does not promise speed or battery life, because it has no honest way to measure either. Even its animation speed setting is described as making the phone feel quicker, which is all it does.

There is one more honest detail. With Power mode, part of Pro, Broomie can clear every app's cache in one tap, through a small helper it sets up via Wireless debugging. Android does that job for all apps or none, so it cannot skip an app you protected. Broomie tells you that before you tap.

How does this compare with other cleaners?

Some tools take a similar line and some do not. Broomie vs Files by Google looks at the free cleaner many phones already have, and Broomie vs SD Maid compares a cleaner built for experienced users. If you have used a cleaner full of alerts, Broomie vs CCleaner covers the differences.

A cleaner earns a place on your phone by being boring in the right way: it shows you what it found, tells you why, does what you confirmed and nothing more. That is also why Broomie has no ads, which we explain in why our apps have no ads.