Last updated: July 3, 2026

The short version

Splay's core features run entirely on your phone. Your camera video, your joint angles, your Mobility Score, and your answers to the setup questions never leave your device. We do not have a server for your health data, and there is no account to create.

One thing does leave your device: the app includes the Facebook SDK from Meta, which we use to measure whether our advertising works. It collects a device identifier, basic app usage events (like installing or opening the app), and purchase events, and shares them with Meta. Because this is used for tracking, iOS will ask for your permission first through the App Tracking Transparency prompt. You can say no, and the app works exactly the same.

If you delete the app, everything it stored on your device is gone with it.

1. Who this policy covers

This policy explains how the Splay app ("Splay," "we," "us") handles information when you use it. It applies to the Splay iOS app and nothing else.

Because Splay has no backend and no user accounts, we (the developer) never receive, store, or have access to your personal health information. The sections below describe data the app handles on your own device, plus the limited advertising data described in Section 2.

2. What the app handles, and where it stays

Everything in this section stays on your device unless a line says otherwise.

Camera video (never saved, never sent). To measure your range of motion, Splay uses your phone camera with Apple's on-device Vision framework. The camera frames are analyzed in memory, frame by frame, and are never written to storage and never transmitted. We do not record, save, or upload video or photos. From each frame the app keeps only the math it needs (joint positions and angles) for a short rolling window of about 12 seconds, then discards it.

Your mobility and fitness data. Your Mobility Score, your per-joint scores, and your scan history are computed on your device and stored on your device (in the app's local storage). This is health and fitness information. It is not linked to your name or any identifier, and it never leaves your phone.

Your setup answers. During onboarding the app asks a few questions (for example an age range, your goal, roughly how many hours you sit, and what is motivating you). Your answers are stored locally and used only to tailor your experience inside the app. They are not linked to your identity and are not transmitted.

App settings. Preferences such as your sound and reminder settings are stored locally on the device.

Subscription status. If you subscribe, your purchase is processed by Apple through the App Store, not by us. The app checks your subscription status with Apple's StoreKit on your device. We do not see or store your payment details. Apple's handling of your purchase is governed by Apple's privacy policy.

Advertising and analytics data (this does leave your device). The app includes the Facebook SDK, provided by Meta Platforms, Inc., which we use to measure the performance of our advertising. Through this SDK, the following is collected and shared with Meta:

• Identifiers (Device ID): a device-level identifier, including your device's advertising identifier (IDFA) if you allow tracking.
• Usage data (product interaction): basic app events such as installing the app and opening it.
• Purchases: the fact that a subscription was started and its value. We never see or share your payment details — only the purchase event.

This data is used for tracking as Apple defines it: it may be linked with data collected from other apps and websites to measure and improve our advertising. Meta's use of this data is governed by Meta's Privacy Policy (https://www.facebook.com/privacy/policy). Your health and fitness data — your video, joint angles, scores, history, and setup answers — is never part of this. Advertising measurement using your device identifier only happens if you allow tracking when iOS asks.