Two numbers, either side
Left: what your dev folders grew since the last scan, +28M. Right: Bud's face, memory in use, 65%, and the hottest CPU sensor, 55°. Every Mac reports its own notch size, so the numbers always clear it.
Early access soon · macOS 14 or later
Keep your dev Mac
cool, clear and awake
Silicon Bud watches your disk, memory and heat while your agents work. See what grew, which tasks hold your RAM, and keep the Mac awake and cool through a long run.
Free to watch. Pro is a one-time purchase. Downloads open once the signed, notarized build is ready.
The notch
Bud lives around the notch
Two numbers beside the notch while you work, never behind it. Hover for one more line, click for the whole picture. These are the builder's real numbers from 8 November.
One line with the details
+28.4 MB since last scan, 44.4 GB memory in use, CPU and GPU temperatures. It sits below the notch and folds away when the pointer leaves.
The whole picture, without opening the app
Disk since the last scan, memory by dev task, how long Claude Code has been at work, 42.31 GB worth a look, keep awake and Scan Now. A click anywhere else closes it.
Up close: the notch as it looked on the builder's Mac.
What Bud watches
Four things a dev Mac runs out of
What grew, and why
Compares your dev folders with the last scan, explains node_modules, Xcode builds and caches, and shows the whole disk.
Which task holds it
Each AI agent with everything it started, editors, Xcode, the Simulator and dev servers, per project.
CPU, GPU and fans
Real sensor readings, the hottest core, and every fan's speed. A fan boost when a long build needs it.
No sleep mid-run
Keep the Mac awake for an hour, four, until you stop it, or exactly while your agents run. Even with the lid closed.
Disk
Your disk grew. See what changed.
Every scan is compared like with like, so growth is real growth. Worth a look points at what's usually safe to clear: older Xcode copies, node_modules left in agent worktrees, the npm cache. Nothing moves until you review it, and then only to the Trash.
Space comes back only after you empty the Trash yourself. Silicon Bud says so every time.
The whole-disk view shows how full the disk is at a glance (used in blue, free in mint) and which folders grew since the last survey. It only reads names and sizes.
Memory and heat
Agents are hungry. Know which one.
Memory by dev task groups each agent with every process it started, so "something is slow" becomes "the agent in project B holds 6 GB". The last six hours sit right below, and temperatures come straight from the Mac's sensors.
On the builder's Mac on 8 November: 44.9 GB in use, 29.3 GB of it dev tasks. Project names hidden.
New
Leave the agents running. Read the night in one card.
While you were away
Back after a few hours? Silicon Bud shows the agent runs and their time, the hottest moment, the memory peak and how long the Mac stayed awake. It even says how much of the break it actually saw.
FreeLast 6 hours
Memory, dev tasks and CPU heat as small lines, one reading a minute. Gaps stay gaps: when the Mac slept, the line breaks instead of pretending.
FreeAgent sessions
Every Claude Code and Codex run of the last three days: when it started, how long it ran, its project and its memory over time.
ProMeet Bud
Your Mac, with a face
Bud lives in your menu bar and the notch. Its face follows real readings, never a guess, so one glance tells you how your Mac is doing. Click it for the menu bar panel: watched disk, memory and heat, keep awake, and Scan Now.
Bud powers on the first time you open Silicon Bud. Its eyes morph between moods, and it blinks.
CalmAll normal.
FocusedAI agents are running.
HotCPU at 90 °C or more.
BreezyFan boost is on.
SurprisedSomething grew on disk.
How it behaves
Looks without touching, until you say so
Scans change nothing
Folder names and sizes only. No file contents, no secrets, no .env files.
Trash, never delete
No permanent delete, ever. It never empties your Trash, and restoring is always free.
A helper with two jobs
Lid-closed mode and the fan boost need a small helper you approve in System Settings. It can do exactly those two things, only for Silicon Bud, and hands control back to macOS on quit, battery power or heat.
Stays on your Mac
No account and no telemetry. Your history never leaves your Mac. This site has no trackers either.
Pricing
Watch for free. Pay once for the kit.
No subscription. Pro adds the tools for long agent runs and the reviewed move to the Trash.
Free
€0
- Scan the folders you choose and compare with the last scan
- Whole-disk view: how full it is and what grew
- Memory in use and the dev-task total
- Last 6 hours of memory and heat, and what happened while you were away
- CPU and GPU temperatures and fan speeds
- Notch mode
- Keep Mac awake for 1 h, 4 h or until off
- Redacted reports, and restore, always
Pro
One-timePrice set at launch
- Everything in Free
- Memory by dev task
- Agent sessions: every run, its time and its memory
- Keep awake while AI agents run, even with the lid closed
- Fan boost for long agent runs
- Daily scans and growth alerts
- Reviewed move to the Trash, with a journal
- Updates for v1
Before you download
Will it delete my code?
Scans change nothing. Only node_modules folders, single Xcode project builds and the npm download cache can be moved, to the Trash, after you review them. Source, archives, simulators, Docker volumes and models are never moved.
Does it need admin rights?
No, except for two optional Pro features: staying awake with the lid closed and the fan boost. Those use a small helper you approve in System Settings, Login Items. It can do only those two things, and you can remove it in Settings.
Is the fan boost safe?
It only ever adds cooling: never below the speed macOS chose, never outside the fan's range. It hands the fans back to macOS when you pick Auto, quit, switch to battery or the Mac gets very hot. If another fan app is in control, Silicon Bud leaves it alone.
Can I close the lid while an agent runs?
With Pro, yes, while Keep Mac awake is on and the Mac is plugged in. Don't put a running Mac in a bag: it can overheat. Silicon Bud lets it sleep on battery or heat.
Can I undo a move to the Trash?
Yes, while the item is still in the Trash and its original place is free. Silicon Bud never overwrites. Once you empty the Trash, recovery may be impossible.
What leaves my Mac?
Your history stays local. The license check talks to the payment provider, and updates come from siliconbud.app. No scan paths, no telemetry.
Is it a subscription?
No. Pro is a one-time purchase for v1. Restore stays free even without a license.
Wasn't this called CacheTrail?
Yes. It started as a disk app and grew into a monitor for the whole dev Mac, so it got a new name and a new face.
Let Bud keep an eye on your Mac
Silicon Bud is being built in public, one day at a time.