KisoStats

Introduction

KisoStats (基礎) is a lightweight system monitor for macOS that lives in your menu bar. Monitor your Mac's CPU, RAM, SSD, and network performance at a glance — without opening any windows.

• Free — No subscription, no in-app purchases
• Private — No data collection, no analytics, no network requests
• Lightweight — Less than 5 MB, minimal resource usage
• Disk Cleanup — Built-in tool to free up storage space
• Multilingual — English, German, and Japanese

Key Features

• Real-time CPU, RAM, SSD, and network monitoring in the menu bar
• CPU/RAM history graphs with 2-minute sparkline charts
• Color-coded status indicators for quick health checks
• Disk cleanup with 8 categories including Browser Cache, Homebrew, and iOS Backups
• Automatic updates via Sparkle
• Auto-start at login option
• Instant language switching (EN/DE/JA) without restart
• Universal Binary — runs natively on Apple Silicon and Intel

Installation

Step 1: Download

Download the latest KisoStats DMG from kyototech.co.jp.

Step 2: Install

1. Open the downloaded .dmg file
2. Drag KisoStats to your Applications folder
3. Eject the DMG

Step 3: Launch

1. Open KisoStats from your Applications folder
2. If prompted, click Open to confirm you trust the developer
3. Grant any requested permissions when prompted (e.g. Downloads folder access)

Step 4: Grant Full Disk Access (recommended)

For the disk cleanup feature to scan and delete files in all categories (especially Trash and Logs), KisoStats needs Full Disk Access:

1. Open System Settings → Privacy & Security → Full Disk Access
2. Click the + button and add KisoStats from your Applications folder
3. Restart KisoStats

System Requirements

Requirement	Details
macOS	14.0 (Sonoma) or later
Architecture	Apple Silicon (M1/M2/M3/M4) & Intel — Universal Binary
Disk Space	Less than 5 MB
Internet	Optional — used only for auto-update checks

Menu Bar Display

After launching, KisoStats appears in your macOS menu bar with a compact two-line display that updates every 2 seconds:

↓12.5K  CPU 15%  SSD 45%
↑8.2K   RAM 6.2G

Symbol	Meaning
↓	Download speed (current network receive rate)
↑	Upload speed (current network transmit rate)
CPU	Processor usage percentage
RAM	Memory currently in use (in GB)
SSD	Storage usage percentage

Click on the menu bar display to open the detail panel with full system statistics and the disk cleanup tool.

System Monitor

The detail panel has three tabs: Monitor, Graph, and Cleanup. The Monitor tab shows comprehensive system statistics with visual indicators:

CPU

Current processor usage displayed as a percentage with a progress bar. Shows real-time load across all cores.

RAM

Memory usage in gigabytes with a percentage indicator. Shows how much of your total RAM is currently in use.

SSD

Storage usage with total capacity displayed. Shows used space as a percentage of your disk.

Network

Real-time download and upload speeds. Automatically scales between B/s, KB/s, MB/s, and GB/s.

Color Indicators

Each metric uses color coding for quick health assessment:

Color	Usage Range	Status
Green	Under 50%	Normal
Orange	50% – 80%	Elevated
Red	Over 80%	Critical

History Graphs

The Graph tab shows CPU and RAM usage over time as sparkline charts with a 2-minute history (60 samples at 2-second intervals).

• CPU History — Processor usage percentage over the last 2 minutes
• RAM History — Memory usage percentage over the last 2 minutes

Each chart includes:

• Gradient fill for visual clarity
• Grid lines at 25%, 50%, and 75%
• Current value displayed as an overlay

Disk Cleanup

The Cleanup tab helps you free up disk space by safely removing temporary and unnecessary files.

Cleanup Categories

Category	Description
User Cache	Application cache files stored in ~/Library/Caches
Log Files	System and application log files
Downloads (>30 days)	Files in your Downloads folder older than 30 days
Trash	Empty your Trash
Xcode DerivedData	Build artifacts from Xcode (for developers)
Browser Cache	Cache files from Safari, Chrome, and Firefox
Homebrew Cache	Downloaded packages and old versions from Homebrew
iOS Backups	Device backups stored in ~/Library/Application Support/MobileSync/Backup

How to Clean Up

1. Open the detail panel by clicking KisoStats in the menu bar
2. Switch to the Cleanup tab
3. Click the refresh button to scan for removable files
4. Review each category and its estimated size
5. Uncheck any categories you want to keep
6. Click the trash button to clean the selected categories

Auto-Update

KisoStats includes automatic update checking via Sparkle. When a new version is available, you will be prompted to download and install it.

• Click the circular arrows icon in the panel header to manually check for updates
• Updates are signed with EdDSA for security
• The update check connects to kyototech.co.jp only

Settings

Auto-Start at Login

Click the power button icon in the panel header to toggle auto-start:

State	Meaning
Blue	KisoStats starts automatically at login
Gray	Manual start only

Language

KisoStats supports three languages:

• English
• German (Deutsch)
• Japanese (日本語)

To change the language, click the globe icon in the panel header and select your preferred language. The change takes effect immediately — no restart required.

Privacy

KisoStats is designed with privacy as a core principle:

• No data collection — KisoStats does not collect any personal or usage data
• No analytics — No tracking, no telemetry, no crash reporting
• Minimal network usage — The only network request is the auto-update check to kyototech.co.jp
• Everything stays local — All system metrics are read and displayed locally on your Mac

Troubleshooting

Common Issues

Issue	Solution
KisoStats does not appear in the menu bar	Check if KisoStats is running in Activity Monitor. Try quitting and restarting the app. Also check System Settings → Control Center → Menu Bar Only.
Cleanup does not free expected space	Some system files may be in use and cannot be removed while active. Try restarting your Mac and running the cleanup again.
Cleanup shows 0 KB for Trash or Logs	KisoStats needs Full Disk Access to scan protected directories. Go to System Settings → Privacy & Security → Full Disk Access and add KisoStats.
CPU/RAM shows incorrect values	System metrics update every 2 seconds. Wait a moment for accurate readings to stabilize.
Some cleanup categories are grayed out	Categories with 0 bytes are automatically disabled. Click the refresh button to rescan.

Uninstalling KisoStats

To completely remove KisoStats from your Mac:

1. Quit KisoStats (click the × button in the panel)
2. Drag KisoStats from the Applications folder to the Trash
3. Empty the Trash

Support & Contact

Resources

• Website: kyototech.co.jp
• Email: support@kyototech.co.jp

Updating KisoStats

KisoStats checks for updates automatically via Sparkle. You can also click the circular arrows icon in the panel header to check manually. Alternatively, download the latest version from kyototech.co.jp.

Copyright 2025-2026 KyotoTech LLC. All Rights Reserved.
This documentation is for KisoStats version 1.5.