Privacy Policy

Effective: 11 August 2026

Poise is built so that the data that matters most, your raw motion and moment-to-moment posture, is read on your device and never transmitted. Poise is provided by Aaron Lalor-Fitzpatrick, an independent developer based in Paraguay, who is responsible for the limited data described below.

What we collect

Here's everything, broken down by where it happens. The short version: your raw motion never leaves your device, and the rest is a limited set of data linked to a random identifier rather than to you, used to run your stats and improve Poise, plus attribution data.

Your raw motion stays on your device. The motion stream Poise reads to detect slouching, the moment-to-moment head angles it produces, and your calibration baseline are all processed entirely on-device. We never collect, store, or transmit your raw motion or the angles derived from it.

What we send to PostHog. To power your progress stats and community comparisons, and to improve Poise, we collect a small amount of data linked to a random, app-generated identifier rather than to you personally:

your daily good-posture total (how long you held good posture each day), which drives your goals, achievements, and comparisons such as "better posture than 26% of users this week";
usage statistics such as how long you use Poise and how many nudges you receive;
the settings you choose, such as nudge sensitivity and hold timers.

About that identifier. It is generated by the app itself. It is not your name, email address, Apple ID, or a device identifier, and it is reset if you delete the app. When you send feedback from within the app, we may attach the same identifier, so that we can see how Poise was being used when you reported a problem. Where you also provide an email address with your feedback, that submission is no longer anonymous to us.

You can turn all of this off at any time in Settings → Privacy. If you do, your personal stats stay on your device but community comparisons won't be available.

Analytics on this website

This website uses Google Analytics 4 to understand how visitors find and use the page. Google Analytics is loaded only after you accept the cookie banner. If you decline, no analytics cookies are set and only anonymous, aggregate signals are sent to Google. We never see your IP address in full (it's anonymised), and we don't use this data for advertising.

This website also uses Vercel Speed Insights to measure how fast the page loads for real visitors. Speed Insights does not use cookies, does not identify users, and is enabled regardless of cookie consent.

Analytics in the app

The Poise app uses RevenueCat to manage your subscription and PostHog to understand aggregate app usage patterns. Alongside the data described above, PostHog may collect further details such as session length and which screens you open, all linked to the same random identifier, but never your name, contacts, or your raw motion stream. You can disable PostHog analytics in the app's Settings → Privacy menu.

Advertising attribution

If you install Poise after tapping one of our ads (for example on TikTok), we use AppsFlyer together with Apple's SKAdNetwork to understand which campaign led to the install, so we can measure whether our advertising is working. This tells us things at the campaign level only, such as how many installs a given ad produced.

We do not collect Apple's advertising identifier (IDFA), and Poise does not track you across other apps or websites, so iOS does not ask you for tracking permission. Attribution relies only on Apple's privacy-preserving SKAdNetwork and limited, non-identifying signals such as device type and operating system version. We never use this to build an advertising profile about you, and we never sell it.

Contact form and in-app feedback

If you send us a message via the contact form, we receive the name, email address, topic, and message you submit. Submissions are delivered to us by a third-party form provider, Web3Forms, which also captures the sender's IP address so we can identify and block abuse. We use this information solely to reply to your message and to keep the form free of spam. We never share it with advertisers or use it for marketing.

You can ask us to delete the message thread at any time by replying to our response and requesting deletion. See Web3Forms' own privacy policy for details on how they process form submissions on our behalf.

In-app feedback. You can also send feedback from inside the Poise app. When you do, we receive the message you write, along with basic technical details such as your app version and device model (for example, "iPhone16,2"). The email field is optional: if you provide one, we use it solely to reply to you; if you leave it blank, your feedback reaches us with no contact details attached. In-app feedback is stored by Supabase, Inc. on servers in the United States. Unlike the website contact form above, no name or topic is collected, and we do not store your IP address alongside your feedback. As with any internet service, Supabase records the IP address your request comes from in its own server logs, which it retains for a limited period for security and operational purposes.

Subscriptions

Subscription purchases are processed through Apple's App Store. Payment information is handled entirely by Apple and is never accessed by Poise.

No account required

Poise does not require account creation, and we never collect your Apple ID. The only information the app collects on its own is the limited data described above, linked to a random identifier rather than to you. We receive contact details only if you choose to give them to us, either by messaging us through the website contact form or by adding an email address to feedback you send from inside the app.

How long we keep data

Your raw motion and the angles derived from it: stays on your device; deleted when you delete the app.
Data sent to PostHog (daily good-posture total, monitoring time, nudge counts, settings): kept for up to 24 months, then deleted. Turn this off any time in Settings → Privacy.
Contact messages: kept only as long as needed to handle your enquiry, and deleted on request.
In-app feedback: kept for up to 24 months, then deleted, or sooner if you ask us to delete it.
Attribution data: SKAdNetwork reports are aggregated by Apple and are not tied to you.

Children's privacy

Poise is not directed to children under 13, and we do not knowingly collect personal information from them. If you believe a child under 13 has provided us information through the contact form or in-app feedback, get in touch and we'll delete it.

Your rights

You can stop using the app at any time and delete all local data by removing the app.
You can cancel your subscription anytime through your Apple subscription settings.
If you have questions about your data, get in touch.

Your rights in your region

Depending on where you live, you may have additional rights over your personal data:

EU / UK (GDPR): you can request access to, correction of, or deletion of your data, object to or restrict its processing, and request a copy of it. The legal basis for our limited processing is our legitimate interest in understanding and improving how Poise works, which covers the app-usage data and the feedback described above, plus your consent for website analytics. You can object to app analytics at any time by turning them off in Settings → Privacy; to have feedback you have sent us deleted, get in touch. You can also complain to your local data-protection authority.
California (CCPA/CPRA): you can request to know what personal information we hold, request its deletion, and opt out of any sale or sharing of personal information. We do not sell your personal information.

To exercise any of these rights, get in touch. We won't charge you or treat you differently for asking.

Changes to this policy

If we update this policy, we'll change the effective date at the top of the page. Material changes will be highlighted within the app.

Contact

For privacy questions, send us a message.