📶 Yifi

See what's slowing you down.

Yifi is a native macOS menu bar app with a minimal always-on footprint that monitors your network health in real time. It breaks your connection into clear sections so you can quickly find where problems start, whether that is your Wi-Fi signal, router, ISP, or DNS.

Features

• Lives in your menu bar, always one click away and out of the way
• Real-time diagnostics update every 3 seconds across four key areas:
  • Connection to Router: link rate, signal strength, noise level
  • Inside Home Network: latency, jitter, and packet loss to your router
  • Connection to Internet: latency, jitter, and packet loss to the internet
  • Website Name Lookup: DNS resolution speed
• Color-coded status indicators: green, yellow, and red dots show what is healthy and what is not
• Sparkline charts: mini trend graphs for each metric so you can spot patterns over time
• Liquid Glass design with a native macOS look and feel

Resource Footprint

Yifi is designed to stay in the menu bar all day with a small runtime footprint.

• Measured on a live yifi process using top (61 samples at 1s intervals over 60s)
• CPU usage: 0.469% average, 2.200% p95, 2.500% max observed
• Memory usage: 27.07 MB average resident, 28.00 MB p95/max observed
• Threads: typically single-digit

This is consistent with a native Swift/macOS background app that polls lightweight network diagnostics every few seconds.

CPU Profile (60s, 1s interval)

%%{init: {"xyChart": {"width": 420, "height": 220}} }%%
xychart-beta
    x-axis "Percentile" ["avg","p50","p95","max"]
    y-axis "CPU %" 0 --> 2.6
    bar [0.469,0.000,2.200,2.500]

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Memory Profile (60s, 1s interval)

%%{init: {"xyChart": {"width": 420, "height": 220}} }%%
xychart-beta
    x-axis "Percentile" ["avg","p50","p95","max"]
    y-axis "Memory (MB)" 26.5 --> 28.5
    bar [27.07,27.00,28.00,28.00]

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Requirements

• macOS 26.2 or later
• Location permission (required by macOS to access Wi-Fi information)

Install with Homebrew

brew install --cask itsnauman/yifi/yifi

Yifi is distributed unsigned, so macOS will block it on first launch. Run this to fix it:

xattr -cr /Applications/yifi.app

Building from Source

1. Clone the repository:

   git clone https://github.com/itsnauman/yifi.git
   cd yifi

2. Open in Xcode (26.3+):

   open yifi.xcodeproj

3. Build and run (Cmd + R). The app will appear in your menu bar.

Yifi has no third-party dependencies. It uses only Apple frameworks (SwiftUI, CoreWLAN, CoreLocation).

Permissions

On first launch, Yifi will ask for location access. macOS requires this for any app that reads Wi-Fi network information. Yifi does not track or store your location.

License

MIT