Before replacing your PC,
run the diagnostic
Nyctale explains in plain language why your computer overheats or slows down, then helps you fix it in a few clicks. No overly complex tools: it's built for everyone.
Windows 10 and 11 — via the Microsoft Store, no sign-up required
Here's what Nyctale tells you
A verdict in plain words, not a wall of numbers: what's wrong, why, and what to do about it.
And when no software can fix the problem, Nyctale says so honestly — instead of selling you a cleaner or a new PC.
What does the Nyctale diagnostic check?
A slow computer always has a cause. Nyctale finds it, instead of leaving you to guess.
Why it overheats
A component stuck in a loop, a program working in the background without you seeing it: Nyctale identifies which one.
Why it's slow
Saturated memory, a memory-hungry browser, a cluttered startup: the diagnostic states precisely what's slowing the machine down, not just "your PC is old".
What's actually broken
A drive nearing end of life, repeated abnormal shutdowns: Nyctale tells apart a real hardware issue from a simple setting to fix.
Nothing leaves your computer
Nyctale reads your computer's information and analyzes it on the spot. No internet connection is needed to produce a diagnostic.
Read-only
The diagnostic never changes anything on your system. It reads, it analyzes, it explains — the decision is always yours.
Easy to understand results
The application gets straight to the point. No technical jargon or complicated graphs, just a clear diagnostic of what's wrong.
What Nyctale checks, in full transparency
No mystery score, no "1,247 problems found": here are the 13 points checked in every scan, and nothing else.
- Runaway programs
- Working memory (RAM)
- Web browser
- Browser memory saving
- Real restarts
- Overheating and slowdowns
- Crashes and shutdowns
- Free disk space
- Drive health
- Battery
- Programs launched at startup
- Windows system files
- Overall machine load
Our commitments
- Nyctale will never sell you a PC: its job is to tell you when a replacement isn't needed.
- It changes nothing without your consent, and tells you plainly when no software can fix the problem.
- No data from your computer is sent online: the diagnostic runs entirely on your machine.
Who makes Nyctale?
Nyctale is developed in France by an independent developer, under the La Fabrik Numérique banner (also behind VoxCut, VectorPop and InOneShot). It is published on the Microsoft Store, which reviews every app before it goes live.
A question, or a doubt about a result? Write to us: contact@nyctale.fr
You repair PCs? Nyctale becomes your client diagnostic tool.
A diagnostic your client understands without jargon, a before/after report that justifies the intervention, and a license that follows you across every machine you work on — even from a USB drive, no internet connection required.
Pricing
See what's wrong first, pay only if you want to go further.
Diagnostic
Free
See before you pay
- Full diagnostic, no limit
- Plain-language explanations
- One guided repair included
Full version
€24.99
one-time payment, no subscription
- Unlimited guided repairs
- Ongoing monitoring: Nyctale warns you as soon as a problem appears
- No account needed, everything stays on your computer
Less than a visit to a repair shop (€50 to €80), far less than a new PC (€300 to €800).
Pro (technicians)
€29.99
per month
- Full technical detail (processes, drive, raw values)
- Before/after report for the client
- PDF export with custom letterhead
- No anti-copy, USB license
Frequently asked questions
Ready to find out what's going on?
Windows 10 and 11 · Install in under a minute
The Microsoft Store installs Nyctale with no Windows security warning. The .exe installer is still available if you prefer.
How does the Nyctale diagnostic work?
Run the scan
One click. No data is sent anywhere — everything stays on your computer.
Read the verdict
No technical jargon: every point is explained as if to someone who knows nothing about computers.
Act, or don't
If everything's fine, you just saved yourself an unnecessary purchase. If something's wrong, Nyctale tells you what to do.