Privacy Policy

Stower is a Mac app that shows you which conversations you owe a reply to. It is built so your data stays on your device. Here is exactly what it does and does not do.

The short version

• Stower reads your Messages and contacts entirely on your Mac.
• Your messages and contacts never leave your device. We can’t see them.
• The only network request the app makes is a one-time license check.
• The app sends no analytics, no telemetry, no “phone home.” The only thing we ever see about how you use the app is what you choose to email us — a bug report, or an aggregate stat you decide to share.
• Payment is handled by Lemonsqueezy. We never see your card details.

Your messages stay on your Mac

Stower reads your local Messages database and your contacts to work out who you owe a reply. All of that analysis runs on your device using Apple’s on-device models. Stower does not upload, transmit, store, or share the contents of your messages or your contacts. There is no Stower server that receives your data, because there isn’t one.

As of June 16, 2026, Stower reads only your Messages and contacts. Reading your Photos is a possible future feature — it is not implemented today. If it is ever added, it will follow the same rule: analysis on your device, nothing uploaded, and we’ll update this policy before it ships.

Transparent analytics: only what you choose to send

Most apps quietly stream usage data home in the background. Stower doesn’t. There is no analytics SDK in the app, no event pipeline, no “anonymous diagnostics” toggle that’s really on by default. We have no way to see how often you open the app, what you click, or whether you’ve actually used it.

The only thing we ever see about your in-app behavior is what you actively email us — usually a bug report, or an aggregate stat the app prepares for you to review and send (something like “7 days of use, 142 messages indexed, 0 errors”). Nothing is attached or transmitted until you hit send in your own email client, and you can read it first.

The one thing that leaves your Mac: a license check

To confirm you’ve paid, the app sends your license key to our payments provider, Lemonsqueezy, to validate it. That request contains your license key and basic activation info — never your messages, contacts, or photos.

Payments and email

When you buy Stower, payment is processed by Lemon Squeezy, LLC, acting as the merchant of record. They collect the information needed to take payment (such as your name, email, and billing details) under their privacy policy. We receive your email address and order details so we can send you your license key and important product emails (for example, security updates). We do not sell your information.

This website

stower.app uses PostHog for anonymous, privacy-friendly usage analytics — so I can see which parts of the page actually help people decide. It records things like which page you visited and which buttons you clicked. It does not collect your name, email, or any personal information, and it is not used for advertising. No data is ever sold or shared. This is separate from the Stower app, which still sends nothing.

If you’d rather not be counted, your browser’s Do Not Track setting and standard ad-blockers (uBlock Origin, etc.) will block it.

Your choices

You can ask us to delete the order and email information we hold by emailing hello@stower.app. Because your app data never reaches us, there is nothing on our side to delete there.

Children

Stower is not directed to children under 13, and we don’t knowingly collect their information.

Changes

We’ll post any updates here and revise the “last updated” date above.

Contact

Questions? Email hello@stower.app.