Congestus
See in seconds what fills your disk: the biggest files, a map of every folder, and the leftovers you can clear. Free for 40 days, then €5 once.
Features
What it does
Very fast scans
One thread per folder: millions of files in seconds on an SSD, with live progress, and cancellable at any time keeping the partial results.
The biggest files
A list of what takes the most space, with category and extension filters. Reveal them in Finder or Explorer, or copy the path.
Folder map
A map of every folder to see at a glance where the space piles up.
Charts by type
Which kinds of files take the most room, click to filter, and the ten heaviest extensions.
Scan history
Every scan is saved in a local database so you can reopen, re-run or delete it.
Cleaning with confirmation
Only when you ask, it sends files to the Trash (macOS and Linux) or the Recycle Bin (Windows), always after a confirmation. Scanning only reads names, sizes and dates.
Privacy
What data it uses
- Nothing leaves your computer: no account, no telemetry and no crash reports.
- The only connection is an optional once-a-day check for new versions on congestus.app, which you can switch off.
- The licence key is verified on your computer; the app contacts no server for that.
- It only stores summaries of each scan in a local database.
Support
Frequently asked questions
How much does it cost?
It is free for 40 days. After that, anyone who keeps using it needs a €5 licence, paid once, with every future version included: one per person for all their computers, or one per shared computer. Nothing is locked when the trial ends; only a reminder appears at launch.
Does it delete files?
Only when you ask, only to the Trash or the Recycle Bin, and after a confirmation. Scanning only reads names, sizes and dates; it never opens or changes your files.
Why do I see access errors on macOS?
macOS protects some folders. To scan the whole disk, give Congestus “Full Disk Access” in System Settings → Privacy & Security, then scan again.
Why does Windows show a warning when installing?
SmartScreen warns about new publishers until our Windows signing certificate is in place. Choose “More info”, then “Run anyway”. The macOS versions are signed and notarized by Apple.
How do I buy a licence?
On congestus.app, through Stripe, which acts as the seller and issues the invoice with the VAT for your country. You receive the key by email and it works on Mac, Windows and Linux.
Can't find the answer? Write to support@diodelogic.com and mention the app name and your system.