Effective date: July 26, 2026
Just'a Tabata is an interval-training timer for iPhone and Apple Watch, made by Vinh Nguyen ("we", "us"). This policy explains what the app does with your information. The short version: we don't collect anything ourselves, and your workouts never leave your device — but the free version shows ads, and Google's ad software collects data to serve them.
We do not collect, transmit, sell, or share your personal data, and we operate no servers of our own.
Your training data stays on your devices. Workouts, history, and health data are never uploaded, never used for advertising, and never shared.
The free version shows ads through Google AdMob, which collects device and ad-interaction data to serve and measure them. See "Advertising" below.
Just'a Tabata Pro removes all ads. Nothing on this page about advertising applies while Pro is active.
Within the European Economic Area, the United Kingdom, and Switzerland, ads are only personalized if you consent — and you can change that choice at any time.
The app keeps the following information only on your iPhone (and, if you use one, your Apple Watch):
Workouts you create, and your Quick Start configuration.
Session history — when you trained, for how long, rounds and sets completed.
Settings — sound, haptics, theme, and similar preferences.
This data lives in the app's private storage on your device. Part of it (your Quick Start and settings) is shared with the app's own Home Screen widget through Apple's App Group mechanism — still entirely on your device. You can delete individual sessions in the app, erase everything with Settings → Reset all data, or remove all app data by deleting the app.
With your permission, Just'a Tabata:
saves your finished workouts to Apple Health (from iPhone and/or Apple Watch), so they count toward your Activity rings, and
reads your live heart rate and active energy on Apple Watch during a workout, solely to display your heart rate on the timer screen.
Health data is handled by Apple's HealthKit on your device and protected by Apple's own privacy safeguards. We never transmit health data anywhere, never use it for advertising or marketing — it is never sent to Google or any ad network — never sell it, and never share it with third parties, including data brokers. You can withdraw Health access at any time in Settings → Privacy & Security → Health, and you can review or delete workout entries in the Health app. Deleting a session inside Just'a Tabata also removes the matching workout that your iPhone saved to Apple Health.
The free version of Just'a Tabata shows ads supplied by Google AdMob (Google Ireland Limited / Google LLC). Ads appear in three places: a banner while a workout is running, a full-screen ad after a finished workout, and an optional video you can choose to watch in exchange for 24 hours of Pro features. Buying Just'a Tabata Pro removes all advertising.
To serve, cap, and measure ads, Google's advertising software collects and processes information from your device, including:
device and app identifiers, such as the Apple Advertising Identifier (IDFA) if you allow tracking, along with a non-personal app-instance identifier if you don't,
device information — model, operating system version, language, and coarse location derived from your IP address (we never request precise location),
ad interaction data — which ads were shown, whether they were viewed or tapped, and whether an ad was fraudulent or invalid.
We never send Google your workouts, your session history, or any Apple Health data. Google acts as an independent controller of the data it collects for advertising; its handling is governed by the Google Privacy Policy and the Google Advertising Policies. We do not receive any of it in a form that identifies you — only aggregate earnings and performance figures.
Tracking. iOS asks for your permission before the app can use the Advertising Identifier to track you across apps. If you decline, ads still appear but are not personalized. You can change this any time in Settings → Privacy & Security → Tracking, and you can reset or limit the identifier there as well.
Consent (EEA, UK, Switzerland). Before any ad loads, we show Google's certified consent form covering advertising purposes and Google's ad partners. To review or withdraw that consent later, open Settings → Ad Privacy Options in the app.
Remove ads entirely. Purchase Just'a Tabata Pro. Ads stop immediately and no further ad requests are made.
The 24-hour Pro pass earned by watching a video is recorded only on your device (an expiry timestamp). Watching a video tells us nothing about you.
If you pair an Apple Watch, your workouts, Quick Start, and settings sync between your iPhone and Watch using Apple's WatchConnectivity — a direct, device-to-device Apple mechanism. This data does not pass through any server of ours.
Just'a Tabata Pro is a single one-time purchase, processed entirely by Apple through the App Store. There is no subscription and nothing renews. We never see your payment details. The app only learns, on your device, whether Pro is active so it can unlock features. Your purchase can be restored on your other devices from the app's paywall, and refunds are handled by Apple.
Earlier versions of the app sold Pro as a monthly or yearly subscription. Those are no longer offered, but if you still hold one it continues to unlock Pro, and you can manage or cancel it in your App Store account settings as usual.
The "Start Quick Start" shortcut and the Home Screen widget run on your device using Apple's App Intents. No request or usage information is sent to us.
If you have opted in to share analytics with app developers (an iOS-level setting), Apple may provide us with aggregated, anonymized statistics such as download counts or crash reports. These contain no workout data, no health data, and nothing that identifies you.
Just'a Tabata is not directed at children under 13, and we do not knowingly collect personal data from them. Because the app serves advertising, it is not intended for use by children under 13; ads are not requested with child-directed treatment. If you believe a child has used the app and you want their device's ad identifier reset, follow the steps under "Your choices" above or contact us.
If the app's behavior ever changes in a way that affects your privacy, we will update this policy and its effective date before the change ships.
Questions about privacy? Email vinhnguyen30062002@gmail.com.