01
Real-time rhythm
Menu-bar readout
Up/down speeds sampled at 1 Hz and shown live in the menu bar. No window required.
BANDWIDTH ECG · SESSION · 14:32:07 LIVE
NETWORK HEALTH MONITOR · for macOS
Your network, on ECG.
A diagnostic monitor for your bandwidth.
Track bandwidth peaks, detect lag arrhythmias, and answer — with data — the one question: do I actually need to upgrade my plan?
CPU
< 1%
RAM
< 50MB
macOS
13+
MONITOR · BandwidthECG.app
RECORDING
318.4 ↓ 42.1 ↑ Mbps
LEAD I · DOWN
318.4 Mbps
LEAD II · UP
42.1 Mbps
Today's peak
471.8 Mbps
Plan usage
63 % · 500 Mbps
CHAPTER 01
Diagnostic Capabilities
Six continuous readings
Six continuous measurements, from live rhythm to long-term trend. Each one reads like a report you can actually use.
02
Peak capture
Daily & all-time
Automatically logs daily and all-time peak throughput so you can tell if your plan still has headroom.
03
Rhythm strips
1m → 24h windows
Six time windows — 1m / 5 / 15 / 30 / 60 min / 24h — to see both micro-spikes and long-term shape.
04
Approach alert
Amber / Red
As usage approaches your plan ceiling, readings turn Amber, then Red — just like a patient monitor.
05
Local chart
No cloud, ever
Every reading stays in ~/Library. No accounts, no telemetry, no uploads. Period.
06
Low-draw instrument
CPU <1%, RAM <50MB
Built on native APIs. You'll forget it's running — which is the point of a good monitor.
CHAPTER 02
Your First Check-up
Three steps, ninety seconds
Check in, attach the electrodes, read the report. Three steps, about 90 seconds.
~ 90 SECONDS
- 01INTAKE
Attach the electrodes
Grab the DMG from GitHub and drop it in Applications. The app takes over the menu bar — no Dock clutter.
RUNTIME ~ 30s - 02CALIBRATION
Enter your plan's ceiling
Tell it your plan's rated speed (say, 500 Mbps) so the instrument knows when to raise an alert.
RUNTIME ~ 20s - 03DIAGNOSIS
Live diagnostic readout
From then on, every glance is a check-up. Upgrade decisions become data-driven — not vibes.
RUNTIME continuous
CHAPTER 03
Live Rhythm Strip
A realistic bandwidth trace
A realistic bandwidth trace — calm baseline, sharp peaks, the occasional spike. Exactly what you want to read at a glance.
RECORDING | SESSION 00418 | WINDOW 15m
PLAN CEILING · 500 Mbps
APPROACH · 80%
AVG 182.6 Mbps
PEAK 471.8 Mbps
DIP 18.2 Mbps
NEAR-PEAK HITS 3
RHYTHM STABLE
14:25 14:28 14:31 14:34 14:37 14:40
CHAPTER 04
Clinical Notes
The five questions we get most
The five questions we get most.
01 Q: Is this really free?
[ + ] [ – ]
Q:
Is this really free?
A:
Yes — 100% free. No subscription, no in-app purchase, no ads.
02 Q: Does my data leave my computer?
[ + ] [ – ]
Q:
Does my data leave my computer?
A:
No. Readings are stored only in ~/Library/Application Support/BandwidthECG on your Mac. This is not a cloud service.
03 Q: Which macOS versions work?
[ + ] [ – ]
Q:
Which macOS versions work?
A:
macOS 13.0 (Ventura) and later. Apple Silicon and Intel are both native.
04 Q: Will it slow down my Mac?
[ + ] [ – ]
Q:
Will it slow down my Mac?
A:
It won't. Monitoring uses native APIs — typically under 1% CPU and under 50 MB of RAM.
05 Q: How do I fully uninstall?
[ + ] [ – ]
Q:
How do I fully uninstall?
A:
Drop the app in the Trash. To clear all recorded readings too, remove ~/Library/Application Support/BandwidthECG.
SIGNED
Dr. Bandwidth
Document ID · BWECG-FAQ-2026-04
Rx
DISCHARGE PRESCRIPTION · TAKE HOME
DATE · 2026-04-24 VALID · indefinitely
Take it home.
Install the instrument.
Free. Local. Lightweight. Starting today, decide with data — not gut feel.
Coming soon · macOS 13+
Requires macOS 13.0+ · Apple Silicon & Intel
PRESCRIBED · 3 ITEMS
- Free · No ads
- 100% local — no data uploaded
- CPU < 1% · RAM < 50 MB
DOSAGE
Always-on · 1 click install · 0 maintenance
COMING SOON
SIGNED BY
Bobo Chen, Engineer
Rx · BWECG-2026-04-24