An honest comparison of the most popular Mac system monitoring, cleanup, and optimization tools. Which one is right for you?
Last updated: March 2026
| Feature | Pulse Pro | CleanMyMac X | iStat Menus | OnyX |
|---|---|---|---|---|
| Price | Free | $40/yr | $12 | Free |
| CPU monitoring | ✓ | — | ✓ | — |
| Memory monitoring | ✓ | — | ✓ | — |
| Storage breakdown | ✓ | ✓ | ✓ | — |
| Battery health | ✓ | — | ✓ | — |
| Network speeds | ✓ | — | ✓ | — |
| Temperature & fans | ✓ | — | ✓ | — |
| Disk I/O | ✓ | — | ✓ | — |
| Menu bar app | ✓ | — | ✓ | — |
| Desktop widgets | ✓ | — | — | — |
| Junk cleanup | ✓ | ✓ | — | ✓ |
| App uninstaller | ✓ | ✓ | — | — |
| Large file finder | ✓ | ✓ | — | — |
| Duplicate finder | ✓ | ✓ | — | — |
| Disk visualizer | ✓ | ✓ | — | — |
| Privacy cleaner | ✓ | ✓ | — | ✓ |
| Login item manager | ✓ | ✓ | — | ✓ |
| Maintenance tools | ✓ | ✓ | — | ✓ |
| Malware scan | — | ✓ | — | — |
Pulse combines system monitoring and cleanup tools in a single menu bar app. It monitors CPU, memory, storage, battery, network, temperature, and disk I/O in real time. On the cleanup side, it includes smart cleanup, app uninstaller, large file finder, duplicate finder, space lens (disk visualizer), maintenance tools, privacy cleaner, and login item manager. It also supports macOS desktop widgets via WidgetKit.
Best for: Users who want both monitoring and cleanup in one free app.
Drawback: No malware scanning. Apple Silicon only (no Intel support yet).
The most popular Mac cleanup tool. CleanMyMac excels at junk removal, app uninstalling, malware detection, and system optimization. It has a polished UI with animated scan progress. However, it's primarily a cleanup tool — it doesn't offer real-time system monitoring, menu bar widgets, or hardware stats like CPU, memory, or temperature.
Best for: Users who want a premium cleanup experience with malware protection.
Drawback: Requires annual subscription. No system monitoring.
The gold standard for Mac system monitoring. iStat Menus shows detailed CPU, memory, disk, network, battery, and sensor data in the menu bar. It offers highly customizable displays and notifications. However, it's monitoring-only — no cleanup tools, no app uninstaller, no junk removal.
Best for: Power users who want the most detailed system monitoring.
Drawback: One-time purchase but no cleanup features. Can be complex for casual users.
A long-standing free maintenance tool for macOS. OnyX runs maintenance scripts, clears caches, rebuilds databases, and manages hidden system settings. It's powerful but has an older-style interface and doesn't offer real-time monitoring or modern cleanup features like app uninstalling or duplicate finding.
Best for: Technical users who want deep maintenance controls.
Drawback: No monitoring. Dated UI. Can be intimidating for beginners.
If you want both system monitoring and cleanup tools without paying a subscription, Pulse Pro covers the most ground. It's the only free tool that combines real-time monitoring (CPU, RAM, battery, temperature) with cleanup features (junk removal, app uninstaller, duplicate finder).
If you need malware scanning, CleanMyMac is worth the subscription. If you only care about monitoring and want maximum detail, iStat Menus is hard to beat. And if you're technical and just need maintenance scripts, OnyX is a solid free choice.
Pulse is genuinely free — no subscription, no ads, no trial period. Both the Lite version (Mac App Store) and Pro version (direct download) are free. We plan to add optional premium features in the future, but the current feature set will remain free.
For most users, yes. Pulse Pro includes smart cleanup, app uninstaller, large file finder, duplicate finder, and maintenance tools — covering the most-used CleanMyMac features. The main thing Pulse doesn't have is malware scanning. If that's essential, you may want to keep a dedicated antivirus tool alongside Pulse.
For casual to intermediate users, yes. Pulse monitors CPU, memory, storage, battery, network, temperature, and disk I/O with a clean interface. Power users who need per-sensor graphs, custom menu bar layouts, or weather integration may still prefer iStat Menus.
Currently Pulse requires Apple Silicon (M1 or later). Intel support may be added in a future update.
Download Pulse Pro — Free