Effective 10 August 2026
What you type into EQExpert when you describe a problem never leaves your device. There is no copy of it on any server, because the app never sends it anywhere. The translator runs entirely in your browser.
We do keep your email address if you make an account, your subscription status if you pay, a small record of which instruments and symptoms get looked up, anything you deliberately write in the feedback box, and the fixes you save to your room memory. That is the whole list.
This policy explains what EQExpert collects, what it does not, who else touches it, and how long any of it is kept. It applies to the EQExpert web app at eqexpert.app.
EQExpert is operated by TMARK PRODUCTIONS, which is the data controller for the information described here. You can reach us at info@markexproductions.com about anything on this page, including any request to see or delete your data.
Our postal address is PO Box 390634, Snellville, GA 30039, United States.
The problem you type in. When you describe what you are hearing, that text is processed by code running in your browser and is never transmitted. It is not logged, not stored, and not used for training anything. It is not sent in a shortened form, a hashed form, or an anonymized form. It simply never leaves the device.
We also do not collect your location, your contacts, your microphone input, or your audio. EQExpert does not listen to anything.
Only if you create an account. Signing in uses a one-time link or code sent to your email, so we hold the address in order to sign you in and to attach your subscription and saved fixes to you. There is no password to store.
EQExpert Pro is billed through Stripe. When you subscribe, your card details go directly to Stripe and are entered on Stripe's own checkout page. We never see, receive, or store your card number. What we receive back is your subscription status, the plan you chose, and a Stripe customer reference so the app knows you are entitled to Pro.
The app records a small, fixed set of events so we can tell which problems people actually hit and whether the fixes work. Each event carries a random session identifier generated on your device, the event name, and a short payload. If you are signed in, it is also linked to your account.
Only these events are recorded: a lookup was performed, a fix was marked as worked or did not work, a soundcheck was started or completed, a clarifying question was answered, a Pro upgrade button was clicked, an entitlement was checked, a quick-fix path was chosen, and the share sheet was opened. The payload holds things like which instrument, which symptom, whether the fix worked, whether you are on Free or Pro, and which link or campaign first brought you to the app. It does not hold anything you typed.
If you use the feedback box, we store the message you wrote, whether you flagged it as a bug, an idea, or a missing term, which build of the app you were on, and whether you were on Free or Pro. If you are signed in, your email address is attached so we can reply. If you are not signed in, the feedback stays anonymous, and we do not attempt to work out who sent it.
Because this box is free text, please do not type anything into it that you would not want us to read.
When you save a fix that worked, we store the name you gave the room, the instrument, the symptom, the action taken, the frequency range, and when it happened. This is what lets the app remember what worked in your room. It is tied to your account, so it only exists if you are signed in.
Your IP address is used to rate limit three endpoints, which is how we stop automated abuse: sending feedback, starting a checkout, and recording product events.
To count requests we store the address in a rate limiting table, on its own, with a counter and a time window. It is not joined to your account, your feedback, or anything else. A daily job deletes every entry older than 24 hours, so an address survives for at most a day.
Our hosting provider also records IP addresses in standard server logs, which is normal for any website.
EQExpert uses your browser's local storage rather than tracking cookies. Nothing here is sent to us unless it is listed as collected above. It stays on your device and you can clear it at any time through your browser settings.
| What | Why |
|---|---|
| Your rooms and channel lineups | So the app opens where you left it |
| Recent lookups | Quick access during a show |
| Saved fixes | A local copy of your room memory |
| Hints and tour progress | So the app stops explaining things you have seen |
| Appearance choice | Light, dark, or follow the system |
| Sign-in tokens | To keep you signed in |
| Referral source | Which link first brought you here |
We do not use advertising cookies, cross-site trackers, or third-party analytics scripts.
We keep the list of outside companies short on purpose. Each one only receives what it needs to do its job.
| Provider | What it handles |
|---|---|
| Supabase | Account sign-in and the database holding events, feedback, and room memory |
| Stripe | Subscription payments and the billing portal |
| Resend | Delivery of sign-in emails, and subscription emails such as welcome, cancellation, expiry and refund notices |
| Vercel | Hosting and standard server logs |
We do not sell your data, and we do not share it with advertisers or data brokers. We would only disclose it if the law required it.
Our providers process data in the United States. If you are in the United Kingdom or the European Economic Area, your data is transferred outside your home region. That transfer relies on the standard contractual clauses our providers offer, which are the safeguards approved for this purpose.
| Data | Kept for |
|---|---|
| Product events | 12 months, then deleted automatically |
| Feedback messages | 24 months, then deleted automatically |
| Room memory | As long as your account exists |
| Account and email | As long as your account exists |
| Subscription records | As long as required for tax and accounting |
| Rate limiting entries | 24 hours, then deleted automatically |
If you close your account, your room memory and your email address are deleted with it. Ask us and we will do it.
If you are in the United Kingdom or the European Economic Area, the law asks us to name a lawful basis for each use.
| What | Basis |
|---|---|
| Account, sign-in, subscription, room memory | Performance of our contract with you |
| Product events and feedback | Our legitimate interest in understanding and improving the app |
| Rate limiting and abuse prevention | Our legitimate interest in keeping the service available |
| Tax and accounting records | Our legal obligations |
Wherever you live, you can ask us to show you what we hold about you, correct it, or delete it. Email info@markexproductions.com and we will respond within 30 days.
If you are in the United Kingdom or the European Economic Area, you also have the right to receive your data in a portable format, to object to processing we base on legitimate interests, to ask us to restrict processing while a dispute is resolved, and to withdraw consent where we relied on it. You can complain to your national data protection authority. In the UK that is the Information Commissioner's Office.
If you are in California, you have the right to know what we collect, to delete it, and to not be discriminated against for asking. We do not sell personal information, so there is nothing to opt out of.
EQExpert is built for people working live sound and is not directed at children. We do not knowingly collect data from anyone under 16. If you believe a child has given us data, email us and we will remove it.
Sign-in is passwordless, so there is no password of yours for anyone to steal from us. Database access is restricted by row-level security, meaning the app can only read rows belonging to the signed-in account. Card details never touch our systems. No system is perfect, and we will tell affected users promptly if something goes wrong.
If we change what we collect or who processes it, we will update this page and move the effective date at the top. Material changes will be announced in the app.
Questions, requests, or complaints: info@markexproductions.com, or write to TMARK PRODUCTIONS, PO Box 390634, Snellville, GA 30039, United States.