HTM Pro · Home Theater Maestro

Standard

Free, forever

Everything you need to understand and design your room, with no account and no time limit.

€0forever

Full 3D room modelling (free shapes, attics, beams)
Speaker placement up to 32 channels (Dolby Atmos, DTS:X Pro, Auro-3D)
Acoustic prediction: RT60, per-seat frequency response, first reflections, 3D modal map
Acoustic treatment plan + DIY absorber calculator
Import your measurements: REW (.mdat), Audyssey (.ady), ColorHCFR (.chc)
Guided video calibration (test patterns, gamma, white balance, CIE)
AV equipment & predicted cabling (design)
Summary PDF + project export, always free

Download for free

Pro

Deliver and prove

The deep analytics and deliverables of a professional , for demanding enthusiasts and installers.

€79one time · 2 devices at a time · 1.x updates included

Per-seat scientific metrics: banded RT60, C50, C80, ITDG, STI, IACC
Full modal analysis: mode list, density, Bonello criterion
Echogram / ETC at the listening position + SBIR detail
Absolute SPL: SPL-meter anchoring + per-seat level
Detailed CEDIA/CTA-RP22 grid (P1–P21)
Full PDF report (~25 sections: acoustics, layout, cabling, bill of materials, compliance, video…)
Calibration exports: EQ filters (REW format) + Audyssey write-back (.ady)
Custom target curve (house curve) with preview
Installer branding on the report cover page
Unlimited projects + compared placement variants
Subwoofer placement optimizer: positions ranked by bass uniformity, applied in one click
Auralization: simulated playback, seat by seat
QRD diffuser designer: build plans for a custom diffuser
3D geometry import beta (.dae / .gltf / .obj): your room from CAD software, with furniture detection
3D model export (.obj / .glb): your room’s real geometry, sloped attic ceilings and non-rectangular footprints included, ready to reuse in your own software
2 devices at a time: your computer and your phone, for instance. Reinstalling or reactivating a device already known costs nothing, and you can release a device at any time from the app to activate another one.

Coming soon 📄 See a sample report (PDF)

Sales are not open yet: the current beta remains fully usable.

By purchasing, you accept the Terms of Sale and the licence. See the refund policy.

Our line: design for free, pay for the deliverable

The core of HTM (modelling, predicting, comparing, importing your measurements) is free and will stay free. Pro funds development by charging for what has professional value: the per-seat numbers, the complete dossier you hand over (or treat yourself to), and the exports that drive your calibration. Your data never leaves your machine, with or without Pro.

For perspective: a basic acoustic study of a dedicated room is billed around €900 incl. tax in France. HTM Pro gives you the complete dossier for less than a tenth of that, regenerable at will as your room evolves. It is also less than the price of a single acoustic panel installed in the wrong spot.

And Pro funds what comes next as much as what exists today. Your feedback and improvement ideas are reviewed as a priority and carry weight on the roadmap whenever we find them relevant. We won't promise to build everything, no one knows what the future holds; but by going Pro you don't just buy features, you take part in what HTM becomes.

A simple activation, then 100% offline

1 · Buy your licence

€79, one time. No subscription, no account to create.

2 · Get your code by email

Right after payment, you receive your license code by email. No account to create, no personal data stored by the app.

3 · Paste your code into HTM

Settings → About → Pro license: paste the code. Pro is active immediately, for life, and the app keeps working fully offline.

Frequently asked questions

How many devices can I use it on?

On two devices at a time, your computer and your phone for instance. Reinstalling or reactivating a device already known does not use up a slot, and you can release a device at any time from within the app (Settings → About) in order to activate another one. No account to create: an Internet connection is only needed for the first activation, after which the software works offline.

I'm changing computers: do I lose my licence?

No. Your key stays valid: paste it on the new device. If both slots are already taken, release the old device from within the app, even if you no longer have it to hand. Nothing to reissue, nothing to buy again.

Is it a subscription?

No: €79, once. All 1.x updates are included.

What about my privacy?

Nothing changes: HTM remains a 100% local application, with no account and no telemetry. Activation is verified on your machine: no connection is ever required. See the privacy policy.

I'm an early tester (founder)

Thank you! Founders receive a free lifetime Pro licence when sales open, replacing their beta code.