Hi Product Hunt, I'm Dmitry, and this is the story why I built Backspace. A while ago I was in a cafe, writing code for one of my mobile apps. No tests running, nothing building, nothing downloading. I noticed the MacBook had 10 GB free and thought: fine, that's enough for now. An hour later macOS warned me there was 1 GB left. I hadn't started anything. I was still trying to find what had eaten the space when it hit zero, and every service I had running started to crash. Backspace is the tool I wanted in that hour. It samples free space in the background, warns you the moment something starts eating the disk, and attributes each drop to what actually changed. For the space that is already gone, it asks the tools themselves: OrbStack, Docker Desktop, Colima and Podman for where their disks live, simctl for which simulators exist and which runtimes they need. It walks the disk for node_modules, target, Pods and the rest, and works out which project each one belongs to. On my own Mac the first scan found: - 212 of 246 Docker volumes that belong to no project - 16 simulators that can't start because their iOS runtime is gone - 6.75 GB of build output in projects nobody has touched in six months Two rules I didn't bend: 1. Honest numbers. Every size is allocated blocks, not apparent size, so a sparse VM image doesn't show up as 8 TB, and space shared through APFS clones isn't counted twice. 2. Nothing leaves your Mac. No analytics, no telemetry. The app talks to Lemon Squeezy for the licence and to our site for updates, and that's all. The scan is free and shows everything. one single payment, no subscription, unlocks removal, background monitoring, alerts, history and an audit log of every command it ran. I'd like to hear what it finds on your machine, and what it misses. Which tool leaves the most behind on yours?

Backspace

Find what Docker, Xcode and your builds did to your disk

Find what Docker, Xcode and your builds did to your disk