Tally

Privacy Policy

What Tally does on your device

Tally is a video editor for dance practice and performance footage. All of its features — dancer tracking, face blurring, audio sync, and visual effects — run entirely on-device using local machine learning models. Your videos, your audio, and your edits are never uploaded, never shared, and never leave your phone.

What we access, and why

• Photo library — Tally asks for access to import videos you choose, and to save your edited videos back to your camera roll when you export. Tally never reads or accesses any photo or video you don't explicitly select.
• Microphone — used only if you choose to record audio directly in the app (for example, to sync against a studio track). Audio is processed and stored locally.

What we store

All projects, edits, and exported videos are stored locally in the app's private storage on your device. Tally has no backend server for your content, no cloud sync, and no user accounts — there is nothing tied to your identity for us to store.

Body-pose and face-landmark data

To keep your chosen dancer centered in frame and to blur bystanders, Tally analyzes video frames on your device to estimate people's body pose. This produces a set of coordinate points for body joints — including approximate positions for the head (nose, eyes, and ears) — that Tally uses purely to locate and follow a person within the frame.

• What is collected — Only the coordinate positions of body-pose joints. Tally does not create a faceprint or face template, does not perform facial recognition, and does not identify who anyone is. The head points are used only as location markers for framing and blurring.
• How it is processed — Entirely on your device, using Apple's on-device Vision framework and an on-device machine-learning model bundled inside the app. No frames, images, or pose data are ever sent off your device.
• Who it is shared with — No one. This data is never transmitted to us or to any third party, and is never sent to any online or AI service.
• Where it is stored and for how long — Pose coordinates are cached locally in the app's private storage so analysis only runs once per video. They remain only on your device and are deleted when you delete the corresponding project.

Anonymous usage analytics

To understand how Tally is used and where to improve it, we collect anonymous, aggregate usage statistics through TelemetryDeck, a privacy-focused analytics service built for this purpose. This data:

• is anonymous and aggregate — it cannot be used to identify you or tied back to you;
• covers things like how often the app is opened and which features are used (for example, how many people use audio sync or a given filter);
• never includes your videos, audio, photos, pose data, or any personal information;
• is not used for advertising, and Tally does not track you across other apps or websites (no IDFA, no ad identifiers).

Analytics is on by default, but entirely optional. You can turn it off at any time under Settings → Privacy → Share anonymous usage. Turning it off stops all collection immediately.

Third parties and AI services

The only third-party service Tally uses is TelemetryDeck, for the anonymous usage analytics described above. Tally does not integrate any advertising or ad-tracking services, and does not send any of your videos, audio, or pose data to any third-party or cloud-based AI service. All machine learning — dancer tracking, body-pose estimation, and face blurring — runs locally on your device and does not transmit that data anywhere.

Children's privacy

Tally does not knowingly collect any personal information from anyone, including children. The only data collected is anonymous, aggregate usage statistics that cannot identify any individual.

Changes to this policy

If Tally's data practices ever change, this page will be updated and the "Last updated" date above will reflect that.

Contact

Questions about this policy? Reach out at tally.dancevideo@gmail.com.