MTAT — Motor Threshold
Maximum-likelihood (ML-PEST) motor-threshold estimation with confidence intervals across four parameter-estimation methods.
For TMS researchers & clinicians
Precise TMS targeting & thresholds, right in your pocket.
TMS Toolbox puts four trusted computational aids — motor-threshold estimation, Beam F3, and 10-20 scalp targeting — into one calm, fast app. Every calculation runs entirely on your device.
No accounts. No tracking. No network required.
Four tools, one app
Everything you reach for at the coil
Each tool implements a peer-reviewed method, with clear inputs and a saveable run log for your records.
Adaptive PEST
Non-parametric staircase estimation of motor threshold using classic PEST step rules — fast and reference-grade.
Beam F3 — Left DLPFC
Scalp-measurement localizer for the left dorsolateral prefrontal cortex using the validated Beam F3 method.
EZ-EEG 10-20 System
Interactive 10-20 scalp targeting with centimeter-distance guidance measured from the vertex.
Why it's different
Built for the way TMS teams actually work
Private by design
No accounts, no analytics, no advertising IDs. Every calculation runs on-device and nothing you enter leaves your phone.
Works fully offline
No internet connection required — ideal for shielded rooms and clinical spaces where connectivity is limited.
Peer-reviewed methods
Each tool implements a published algorithm, with citations to the original method authors right in the app.
Saveable run logs
Export a plain-text log of any run — settings, pulse-by-pulse history, and final estimate — straight to your device's Files.
Fast & focused
A clean, low-distraction interface designed for use at the coil, not a spreadsheet buried in menus.
iPhone, iPad & Android
One consistent experience across platforms so your whole team can standardize on the same tools.
Intended use
A professional aid — not a medical device
TMS Toolbox is intended for trained TMS researchers, clinicians, and technicians. It is an educational, research, and calculation aid — it is not an FDA-cleared medical device and does not diagnose, treat, or make clinical decisions.
Every output should be independently verified against established references and your own clinical judgment before it is used.
Read the full Terms of UseQualified users only
Requires appropriate training in TMS techniques, motor-threshold determination, and scalp-based cortical localization.
Your data stays yours
Head measurements, MEP responses, and threshold estimates never leave your device.
Get TMS Toolbox
Download TMS Toolbox
Works offline, with every calculation running on your own device. Choose the option that matches your hardware.
iPhone, iPad & Mac
One download covers all three. Installed and updated through the App Store.
App Store
The standard way to install on iPhone and iPad. On Macs with Apple silicon, the same app runs natively from the Mac App Store — useful for planning sessions at a desk. Updates arrive automatically, and nothing needs to be enabled or approved first.
Android
Phones and tablets, including Amazon Fire tablets. Three ways to install — any one of them gets you the same app.
Amazon Appstore
For Amazon Fire tablets, and for any Android phone running the Amazon Appstore. Handles installation and updates for you, with no Google account required.
Galaxy Store
Built into every Samsung Galaxy phone and tablet, so there is nothing extra to install. Updates come through the Galaxy Store app alongside your other Samsung apps.
Direct download .apk
Install the app file straight from us, without going through a store. Use this if you don’t have the Amazon or Galaxy store on your device, or if your organisation distributes apps internally. It is the same app, signed by us — but Android will ask you to confirm a couple of warnings along the way, because it can’t verify an app it didn’t supply.
What you’ll see when you install
Download the APK — 9.0 MB
Android shows a warning for any app that doesn’t come from a store — something like “your phone isn’t allowed to install unknown apps from this source”, and possibly “this app wasn’t scanned” or “unknown developer” from Play Protect. That is expected and it is not a sign that anything is wrong — it simply means the app was downloaded directly rather than from a storefront. Here is the whole process:
- Tap Download the APK above on the Android device itself. Your browser may ask you to confirm — choose Download anyway.
- Open the downloaded file, from the notification or from your Files app under Downloads.
- If Android says it isn’t allowed to install from this source, tap Settings, turn on Allow from this source, then press back.
- Tap Install.
- If Play Protect warns about an unrecognised developer, choose More details, then Install anyway.
- Open TMS Toolbox from your app drawer. Done.
Updates are not automatic with this method — check back here for new versions. To confirm you have the genuine file, its SHA‑256 checksum is published next to the download.
Store links go live as each listing is approved. Questions in the meantime? Contact support.
Email support
Get in touch
Have a question, a bug report, or feedback on a method? Send us a note and we'll reply by email. We read every message.
Email us directly
Response time
We aim to respond within 2–3 business days.
Help & docs
Setup, saved files, and FAQs live on the Support page.