Thermal Canary Pro watches your hardware while you game. Crash forensics, throttle diagnosis, and silent overlay alerts - layered on top of the free Thermal Canary desktop app for Linux.
Perpetual license · no subscription · no phone-home after activation
Your GPU cost €700–€1000. Thermal Canary Pro costs €49.
That's 0.05× the hardware cost - cheaper than a USB cable. This isn't software. It's hardware insurance.
No history. No overlay. No alerts beyond the window itself.
Free is a passive display. Pro watches, remembers, and speaks up only when it matters.
A 60-second rolling sensor buffer, auto-dumped the instant your GPU crashes or your PC reboots unexpectedly.
"Your GPU hit 94°C, 340W, right before the crash."
MangoHud shows your FPS dropped. Pro tells you why - thermal limit, power limit, or voltage limit - in plain English, live.
"Frame drop at 14:32 - GPU power limit, not heat."
Repaste your CPU, undervolt your GPU, swap a fan - compare sessions side by side and get a shareable PNG as proof.
"Hotspot delta down 11°C after repaste."
Silent until it matters. A 3-second toast over your fullscreen game the moment something needs your attention.
"GPU 87°C - fan stuck?"
Tracks the gap between edge and junction temperature over weeks. A growing delta means your paste is drying out - before it fails.
"Delta grew 8°C → 19°C over 60 days. Repaste recommended."
Beyond the five headline features, Pro is packed with the kind of detail power users actually check for.
Same live data, tuned for OLED panels, bright rooms, or late-night sessions.
Regular price €59 after launch. No subscription, ever.
Launching soon.
No. €49 once, forever, for every v1.x release. Linux power users are hostile to SaaS pricing on desktop tools, and so are we. A future major version (v2) will be a separate paid upgrade at a steep discount for existing owners - never a recurring charge.
Once. Activation calls our license server a single time, writes a signed offline token to your machine, and that's it. Every check after that is fully local - no telemetry, no background pings, no dashboard tracking your hardware.
Free shows what's happening right now: six live gauges, no memory. Pro remembers, compares, and watches for you - session history, crash forensics, throttle diagnosis, and alerts while you're heads-down in a game.
Any Linux desktop with lm-sensors, an NVIDIA or AMD GPU, and a kernel new enough to expose hwmon (basically anything from the last decade). Steam/Proton gaming and overclocking rigs are exactly what this was built for.
Thermal Canary reads Linux's hwmon kernel interface directly - there's no equivalent on Windows without a completely different sensor stack. We're running the Linux channel hard for now rather than splitting focus.
Activating on a new machine automatically releases the license from the old one - no support ticket, no waiting. Just re-enter your key.
No, and not by default ever. There is no analytics SDK, no crash reporter phoning out, no usage tracking. Session history, health diagnostics, and crash dumps all stay in local files on your machine (~/.local/share/thermalcanary/).
Both are fully supported for temperature, usage, fan, VRAM, and power via NVML (NVIDIA) or amdgpu (AMD). One exception: the Hotspot Delta Analyzer is AMD-only, because NVIDIA's Linux driver doesn't publicly expose GPU junction temperature the way amdgpu does.
One license activates one machine at a time. Switching machines is instant and free (the old activation is auto-released), but two machines can't be active simultaneously. If you regularly hop between two rigs, keep that in mind.
Nothing, for a while. Thermal Canary Pro checks in roughly every 24 hours but tolerates up to 30 days offline before it needs to reconnect. A short outage or a trip off-grid won't lock you out.
Yes, MIT licensed, on GitHub. Pro is a closed-source paid extension that injects panels into the free app; the core sensor reading, gauges, and window are 100% free and always will be.
It only appears when it needs to (a real thermal, power, or fan event), as a small toast in the corner of the screen for about 3 seconds. It's a real window, so yes, it can appear on a capture, same as any other overlay like MangoHud.
