Privacy Policy

1. Information processed on your device

Saved calculations, stock names, and your theme and language settings are stored only on your device. Saved calculations and stock names are never sent to the Operator's servers or included in the usage statistics described below, and the Operator cannot see them. Deleting the app deletes them — there is no separate backup.

2. Advertising and privacy choices

Google AdMob may process the advertising ID and other device identifiers, approximate location inferred from IP addresses, app launches, ad views and clicks, and error and performance diagnostics to provide and measure ads and prevent fraud. Calculation inputs and document contents are not included in ad requests. Loading ads in advance can involve network communication before an ad appears.

Where consent is required, Google’s consent management tool presents choices. When the advertising privacy options entry appears in Settings, you can review or change those choices. You can also reset or delete the advertising ID in Android settings. Deleting that ID or rejecting personalised ads does not stop all advertising-related processing.

Retention, deletion and international processing by Google are described in the Google Privacy Policy and Google’s partner services information. Once an ad-removal purchase is verified, the app stops new ad requests; information already processed is not automatically deleted.

3. Purchase information

Remove ads is a one-time Google Play in-app purchase, not a subscription. The app processes Google Play purchase information to verify and restore ownership and stores the purchase status on the device. Payment details such as card numbers are not provided to the Operator, and the app does not send the purchase information it uses for verification to the Operator’s servers. While usage statistics are being sent, however, the purchase of Remove ads may be recorded in the usage statistics described below.

4. Usage statistics

To understand how each feature is used and to improve the app, the app sends usage statistics to Firebase Analytics, a Google service. Usage statistics are not used for advertising.

• Sent: the features you use; automatic usage events such as first open, screen views and engagement time; an app instance ID (different for each installation); app and OS versions, device model and language; approximate location at country or city level inferred from your IP address; ad-related events; and, if you buy ad removal, a purchase event (product ID, name, price and currency)
• Not sent: numbers and amounts you enter, stock names and saved calculations; your name and email address; the advertising ID and the Android device ID (SSAID). Ad personalisation signals are also turned off
• Storage: records are copied daily via BigQuery (Google Cloud) to the Operator's database and deleted 14 months after collection. Aggregate results without identifiers may remain
• Turning it off: use Settings › Send usage statistics, which is on by default. Every feature remains available, and records sent before you turned it off are deleted when the retention period ends. Because the records contain nothing that identifies you, the Operator may be unable to find them if you ask for deletion

The Operator entrusts the collection and storage of usage statistics to Google LLC, and in the process they are transferred abroad as follows.

• Recipient: Google LLC (privacy inquiries)
• Countries, timing and method: the United States and other countries where Google operates data centers, sent over the network from time to time while you use the app
• Data, purpose and retention: the data listed under Sent, for analysing feature usage and improving the app, kept for 14 months from collection
• How to refuse and its effect: turning off Settings › Send usage statistics stops the transfer, and refusing does not limit your use of the app

For details on how Google processes this data, see the Firebase privacy information.

The Operator entrusts the operation of the database holding the copied records to Supabase (privacy policy); the records are stored in the Republic of Korea (Seoul region), and only the Operator's administrative accounts can access them. Records sent before this policy takes effect may also be copied to this database after it takes effect, while they remain with Google.

5. Storage, deletion and requests

Internal app data stays on your device to provide the features. Clearing app data or uninstalling the app removes internal data, which the Operator cannot restore. Copies you save, export or share separately must be deleted at their storage location or from the receiving service.

If you email the Operator, the Operator processes your email address and message to reply. Do not send unnecessary documents, passwords or payment details. For access, correction, deletion, restriction of processing or withdrawal of consent, contact twinkle.ai.labs@gmail.com. For on-device data the Operator does not hold or information managed by Google, the Operator explains how to act through the relevant device or service.

Inquiry information is deleted without undue delay after the response and follow-up are complete, unless retention is required by law, in which case it is kept for the legally required period.

6. Children and contact

The Service is not directed at children under 16. If you believe a child’s personal information has been provided to the Operator, contact twinkle.ai.labs@gmail.com. The Operator is Twinkle AI Labs, a name used by an individual.

7. Changes

Revisions and their effective dates are announced on Polaris and in the app policy screens: at least 7 days before ordinary changes and 30 days before material or unfavourable changes.