Privacy Policy | MotorTach

This page covers both of our iPhone apps. MotorTach reads a motor's speed and load from the sound it makes. MotorTach Pro does the same and adds job sites, motor records over time, PDF reports and backups for technicians and contractors.

The short version

Neither app collects anything. There is no account, no analytics, no advertising, no tracking and no third-party code.
Neither app has an internet connection of its own. Nothing is sent to us or to anyone else.
Everything you record or type stays on your iPhone. It leaves only when you share or save it, and only to the place you pick.

Both apps

Microphone

The apps need the microphone while a reading is running. iOS asks your permission the first time, and you can turn it off at any time in Settings. Sound is analyzed on your iPhone as it arrives. It is never uploaded.

Saved recordings

A recording is kept only when you tap Save. It is stored in the app's own storage on your iPhone with the reading and the motor's settings. Deleting the recording deletes the sound. Deleting the app deletes all of them.

Sharing

When you share a recording, the app packages it and hands it to the app you choose: Mail, Messages, AirDrop or Files. We don't pick who it goes to and don't send anything on our own. Once you've sent it, the app you used decides what happens to it.

A shared recording contains:

the sound
the reading, as text and as a data file
the motor's settings and any names, notes or labels you gave it
the nameplate photo, if you took one
a short measurement log (numbers only, no sound and no personal information)
a random identifier made when the app was installed, so recordings from one phone can be studied together. It isn't your name, your Apple Account or your phone's ID.

Camera and nameplate photos

The camera is used only to photograph a motor's nameplate. Each photo is re-saved when you take it, which removes the location, time and camera details your iPhone would otherwise attach. Photos are stored with the motor and deleted with it.

Photo library

If you choose, the apps add screenshots of a reading (and, in MotorTach Pro, nameplate photos) to your photo library. This is add-only access: the apps never read or browse your photos. You can turn it off in Settings.

Children

These are tools for working on machinery. They aren't directed at children and collect no data from anyone.

What's different in each app

Topic	MotorTach	MotorTach Pro
Sound kept after a reading	The last 15 seconds, in memory, until you start a new reading or leave the app. Kept only if you save it.	Kept only when you save a sample.
Measurement log	A numbers-only log on the phone. It leaves only if you send it from Help, or with a recording you share.	The log for each saved sample is stored with that sample and leaves only inside a share. There is no running log.
Files app	Saved files are private to the app.	Your files can be seen in the Files app and copied off with a cable (Finder on a Mac, Apple Devices on Windows), so you can keep your own copies.

MotorTach Pro only

Job sites and customers. You can type in site names, addresses and contact details. They're stored only on your iPhone and leave it only inside a report, an export, a backup or a handover that you make. Please treat your customers' details with the same care you would on paper.
PDF reports and spreadsheet (CSV) exports. These are created on your iPhone when you ask for them and include whatever is in the records you chose: site, motor and reading details, your company name and logo. You choose where they go.
Backups and handovers. A backup copies your records, recordings and photos into one file saved where you choose: your own Mac, PC, network drive or iCloud Drive. A handover file sends one site to another technician who uses the app. We never see either file.
Reading nameplate text. Selecting text in a nameplate photo uses Apple's Live Text, which runs on your iPhone.
No location. MotorTach Pro doesn't use your location.

Changes to this policy

If this policy changes, the new version will be posted here with a new date. Any change to what can leave your iPhone would also be shown in the apps themselves.

Contact

Questions about privacy in MotorTach or MotorTach Pro:

info@harmonicsentry.com

MotorTach and MotorTach Pro are published by Harmonic Sentry LLC.