I make Shiny, so you should weigh that accordingly. I've tried to write this the way I'd want it written if I were the buyer: honest about what each app does, clear about who each one is right for, and upfront about the cases where you genuinely want both.
At a glance
| Shiny | iStat Menus | |
|---|---|---|
| Price | $4.99 once | $11.99 once (or via Setapp bundle, ~$9.99/mo) |
| Job | Action: frees memory | Monitor: shows live stats |
| Lives in menu bar as | One polished button | CPU, GPU, RAM, network, sensor graphs |
| Memory clearing | Yes | No |
| Live stats display | No | Yes, extensive |
| Active development since | 2025 | 2008 |
| Setapp bundle | No | Yes |
Different jobs, different tools
This is the part most comparison articles skip, because "vs" implies competition. iStat Menus and Shiny are not really competitors. They sit on opposite sides of the same problem.
iStat Menus is a system monitor. It watches your Mac continuously and surfaces what it finds: CPU usage per core, GPU load, RAM consumption, network throughput, disk I/O, sensor temperatures, fan speeds, and battery health. All of it streams live into your menu bar. It doesn't change anything. It's read-only, real-time diagnostics.
Shiny is an actor. It doesn't display live stats. What it does is free memory: close orphaned helper processes, release inactive RAM, pause idle background apps. You click the menu-bar button, it acts, it tells you how much it freed. That's the whole thing.
If you're slowing down and want to understand why, iStat Menus is the tool. If you're slowing down and want to fix it, Shiny is the tool. A lot of people end up wanting both.
Where iStat Menus wins
iStat Menus has been in continuous development since 2008, made by Bjango, a small Australian studio. That's nearly two decades of polish, and it shows.
Depth of monitoring. If you want to know your CPU temperature, your fan RPM, your GPU memory load, your network packet count, and your battery health cycle count, all simultaneously, iStat Menus delivers this. The data is accurate, the graphs are configurable, and you can choose exactly which stats appear in your menu bar and which live in the dropdown.
Apple Silicon awareness. On M-series Macs, iStat Menus surfaces data that matters specifically to Apple Silicon: unified memory pressure, the Neural Engine, efficiency vs. performance core splits. If you care about understanding how your M-chip is behaving under load, it's the best tool available for that job.
It's the power-user standard. If you read MacRumors forums, follow Mac-adjacent tech YouTube, or care about system internals, you've seen iStat Menus. It's the default recommendation for anyone who wants to keep an eye on their machine. The reputation is earned.
Setapp availability. If you're already paying for a Setapp subscription, iStat Menus is included. No additional cost. That changes the calculation significantly.
Where Shiny wins
Shiny is for a different kind of person: someone who doesn't particularly want a dashboard, but does want a fast way to clear memory pressure when their Mac starts dragging.
One job, no friction. There's no graph to interpret, no stat to understand, no decision to make. Your Mac feels slow. You click Shiny. It frees memory. You move on. The whole interaction takes about two seconds, and you never have to open an app or navigate anywhere.
It actually does something. iStat Menus will show you a red RAM graph. It will not do anything about it. If seeing the red graph is enough for you (maybe you restart the offending app yourself), great. If you want a tool that resolves the problem, that's Shiny's job.
Price. $4.99 once. iStat Menus is $11.99 once, which is also fair for what it does, but if you only need a memory action and not a monitoring suite, Shiny is the more focused spend.
No graphs eating your menu bar. iStat Menus, by design, puts a lot of information in your menu bar: CPU graphs, RAM bars, network throughput numbers. That's the value proposition. Some people love it. Others find it visually noisy. Shiny takes up one small button.
Can you (should you) use both?
Yes, and many people do. The workflow is natural: iStat Menus surfaces the problem (RAM pressure creeping up, temperatures rising, a process eating CPU), and Shiny gives you one button to act when memory is the culprit.
They don't conflict. They don't overlap. iStat Menus is read-only; Shiny does the write operation. Running both is a reasonable and common setup, not overkill.
The combined cost is about $17 one-time (assuming you buy iStat Menus directly rather than via Setapp). That's less than a single month of some software subscriptions, and both apps last indefinitely.
If you're already on Setapp, iStat Menus is already in your plan. In that case, adding Shiny for $4.99 gives you the action layer that iStat Menus deliberately doesn't include.
Who probably doesn't need both: someone who just wants one button to fix slow performance and has no interest in system monitoring. That person wants Shiny only. Who probably should consider both: anyone who already uses or wants iStat Menus for visibility, and occasionally finds themselves staring at a red RAM graph wishing something would just clear it.
Bottom line
iStat Menus and Shiny aren't really alternatives. They're complements that happen to share a topic (RAM) while doing completely different things with it.
If you want system visibility: iStat Menus. It's the best Mac monitor available, has been for years, and $11.99 is fair for what it delivers.
If you want to free memory in one click: Shiny. $4.99 once, no dashboard, no graphs, just the action.
If you want both: run both. They're designed for different jobs and sit comfortably side by side in your menu bar.
The only case where you're genuinely choosing between them: you only have $12, you care about RAM, and you're deciding how to spend it. If you'd look at a live dashboard, get iStat Menus. If you'd rather just have a button that fixes the problem, get Shiny. If the $5 difference doesn't matter, get both.
For more on the memory-clearing side of things, see how Shiny compares to Activity Monitor, or the broader best Mac memory cleaners in 2026 roundup. If you're still deciding whether any of these tools are worth it, are Mac cleaner apps actually worth it is the honest starting point. And if you want to understand what Activity Monitor is actually showing you, how to use Activity Monitor on Mac covers the basics clearly.