Stats vs iStat Menus vs FavTray
Stats vs iStat Menus vs FavTray
System monitoring is one of the most common uses for the macOS menu bar. A 2025 MacUpdater analysis found that system monitors are the third most-installed category of Mac utilities, behind password managers and screenshot tools. The three main options in 2026 are Stats (free, open-source), iStat Menus ($14.99, commercial), and FavTray (free core with Pro tier, bundled with developer tools).
This comparison breaks down features, pricing, resource usage, and the best choice for different workflows.
How do Stats, iStat Menus, and FavTray compare on features?
All three apps monitor the same core system metrics, but they differ significantly in depth, customization, and scope.
| Feature | Stats (Free) | iStat Menus ($14.99) | FavTray (Free / Pro) |
|---|---|---|---|
| CPU monitoring | Yes | Yes (per-core graphs) | Yes |
| GPU monitoring | Yes | Yes | Yes |
| RAM usage | Yes | Yes (process breakdown) | Yes |
| Disk usage | Yes | Yes (S.M.A.R.T. data) | Yes |
| Network throughput | Yes | Yes (historical) | Yes |
| Battery health | Yes | Yes (cycle count, health) | Yes |
| Bluetooth devices | Yes | No | No |
| Fan speed / temperature | Yes | Yes (custom sensors) | No |
| Weather | No | Yes | No |
| Historical graphs | No | Yes (up to 30 days) | No |
| Menu bar widgets | Yes (basic) | Yes (highly customizable) | Minimal (single icon) |
| Notification alerts | No | Yes (temp, battery thresholds) | No |
| Eye rest timer | No | No | Yes |
| AI cost tracking | No | No | Yes |
| Window management | No | No | Yes |
| Port management | No | No | Yes |
| Keep-alive | No | No | Yes |
| Open source | Yes | No | No |
Stats covers the broadest hardware monitoring for free. iStat Menus adds depth — historical data, custom sensors, notification thresholds, and the most customizable menu bar widgets available. FavTray trades monitoring depth for breadth, bundling basic system info with five other developer tools.
What does each app cost?
Pricing models differ significantly across the three options:
| Stats | iStat Menus | FavTray | |
|---|---|---|---|
| Upfront cost | Free | $14.99 (one-time) | Free |
| Subscription | None | None | ₹49/mo (Pro, optional) |
| In-app purchases | None | None | None |
| License type | MIT open source | Per-seat commercial | Per-seat, free core |
| Family sharing | N/A | No | No |
| Upgrade pricing | N/A | Major versions paid | Included in subscription |
Stats is the clear cost winner for pure system monitoring — it is free with no catches. iStat Menus charges $14.99 once but historically charges for major version upgrades (version 6 to 7 was a paid upgrade). FavTray’s system monitoring is free; the Pro subscription adds advanced features across its other plugins.
Which system monitor uses the fewest resources?
Resource consumption matters because a monitoring tool that hogs CPU defeats its own purpose.
| Metric | Stats | iStat Menus | FavTray |
|---|---|---|---|
| RAM (idle) | ~50-80 MB | ~60-90 MB | ~40 MB |
| CPU (idle) | 0.5-2% (continuous) | 0.3-1.5% (continuous) | ~0% (on-demand) |
| CPU (active popover) | 2-4% | 2-5% | 1-3% |
| Menu bar icons | 1-6 (configurable) | 1-8 (configurable) | 1 (shared with all plugins) |
| Disk footprint | ~15 MB | ~25 MB | ~8 MB |
| Update interval | 1-10 seconds | 1-30 seconds | On popover open only |
FavTray takes a fundamentally different approach: it only polls system metrics when you open its popover. When the popover is closed, CPU usage from monitoring is effectively zero. Stats and iStat Menus update continuously to keep menu bar widgets current, which consumes a small but constant amount of CPU.
This on-demand design means FavTray uses fewer resources overall, but you do not get persistent menu bar readouts for CPU or RAM. If you need a live CPU graph always visible in your menu bar, Stats or iStat Menus is the better choice.
When should you use Stats?
Stats is the right choice when you want dedicated, detailed system monitoring with zero cost:
- You want per-core CPU graphs in the menu bar
- You care about fan speeds and thermal monitoring
- You want Bluetooth device battery levels
- You prefer open-source software you can audit and contribute to
- You do not need additional developer tools bundled in
Stats is maintained by exelban and has over 25,000 GitHub stars. It is the most popular open-source Mac system monitor and receives regular updates.
When should you use iStat Menus?
iStat Menus is the right choice when you need the deepest monitoring capabilities and are willing to pay for polish:
- You need historical graphs (daily, weekly, monthly trends)
- You want notification alerts when CPU temperature exceeds a threshold
- You need S.M.A.R.T. disk health monitoring
- You want weather in your menu bar alongside system stats
- You prefer highly customizable menu bar widget layouts
iStat Menus 7 by Bjango has been the benchmark for Mac system monitoring since 2009. Its $14.99 price is reasonable for the depth it provides.
When should you use FavTray?
FavTray is the right choice when you want system monitoring as part of a broader developer toolkit:
- You need system info alongside window management, eye rest, AI tracking, keep-alive, and port management
- You want to minimize menu bar icon count (one icon instead of five or six)
- You prefer on-demand monitoring that uses zero resources when not viewed
- You already use or plan to use FavTray for its other plugins
FavTray’s System Info plugin covers the metrics most developers check regularly — CPU, RAM, disk, network, and battery — without the granularity of per-core breakdowns or historical charts.
Can you run Stats or iStat Menus alongside FavTray?
Yes. There is no conflict in running a dedicated system monitor alongside FavTray. A common setup is Stats for persistent menu bar CPU/RAM readouts plus FavTray for everything else. This adds one extra menu bar icon but gives you the best of both approaches: continuous monitoring from Stats and on-demand developer tools from FavTray.
For developers who want to consolidate everything into a single icon, FavTray’s built-in system monitoring covers the essentials. For those who need deep hardware telemetry, pairing Stats or iStat Menus with FavTray is a practical combination. Read more about menu bar organization strategies to find the right setup for your workflow.
Frequently Asked Questions
Is Stats app as good as iStat Menus?
Stats is a free, open-source system monitor that covers CPU, GPU, RAM, disk, network, battery, and Bluetooth. iStat Menus adds more detailed breakdowns, historical graphs, weather, and custom menu bar widgets. For basic monitoring, Stats is excellent. For deep customization and historical data, iStat Menus justifies its $14.99 price.
What is the best free system monitor for Mac?
Stats (github.com/exelban/stats) is the best free Mac system monitor. It provides CPU, GPU, RAM, disk, network, and battery monitoring with configurable menu bar widgets. FavTray also includes free core system monitoring alongside 6 other developer tools.
Does iStat Menus work on macOS Sonoma and Sequoia?
Yes. iStat Menus 7 supports macOS Sonoma (14) and Sequoia (15). Earlier versions may have compatibility issues. Stats and FavTray both require macOS 14.0 or later.
Can one app replace both iStat Menus and a break reminder?
Yes. FavTray includes system monitoring (CPU, RAM, disk, network, battery) alongside an eye rest timer, AI cost tracker, window manager, port killer, keep-alive, and cloud cost tracker — all in one menu bar icon. This replaces iStat Menus plus 4-5 other utilities.
Which Mac system monitor uses the least resources?
FavTray's system monitor only collects stats while the popover is open, using zero CPU when closed. Stats runs continuously in the menu bar. iStat Menus runs continuously with configurable update intervals. For minimal resource impact, FavTray's on-demand approach is lightest.