Updated: 9 November 2026. Applies to versions 0.2.6 through 0.2.9. The Google Drive section applies only to version 0.2.9 and versions offering that optional feature; it does not confirm public availability or Google approval. The automatic local backup described below is available from version 0.2.8; earlier versions provide manual backup and restore.
TAS Time & Calc is provided by Tempo Apps Studio. For privacy questions or requests concerning information you have sent us, contact info@tempoappsstudio.com.
Calculations on your device
The app stores calculations, calculation history, favourites, saved formulas, calculator memory and settings in its own storage on your device. Trial timestamps, licence status and limited local counters used to suggest a review are also stored there. A randomly generated local installation identifier binds personal gift licences to an installation. This is not an IMEI or Android advertising ID. The app has no account registration, developer-operated synchronisation server, advertising SDK or developer-operated user analytics system. Your calculations are not automatically sent to Tempo Apps Studio.
Google Play
Google Play handles payments, purchase status and purchase restoration. The app uses product and purchase information to display prices, verify entitlements and acknowledge purchases. A locally stored purchase receipt may contain product information, a purchase token and a signature. The app does not give Tempo Apps Studio your payment card details. Voluntary coffee contributions are separate purchases and do not grant access rights. Google Play components also process technical information to operate and diagnose these services. The app includes Google Play Billing and its technical transport component. Google processes technical interactions and device information in this context; Tempo Apps Studio does not use this to analyse your calculations. For update checks, Google Play processes device metadata, the app version and information about installed app components to determine suitable updates. If you voluntarily submit a rating or review, Google processes the rating and any text. Public reviews may appear on Google Play; closed-test feedback may be shared privately with the developer. These services are also governed by Google's privacy terms: https://policies.google.com/privacy .
Backups, exports and sharing
You create manual backups and exports on request and choose the destination or receiving app through Android. If you choose a cloud provider for this, that provider processes the file under its own terms. From version 0.2.8, you can also opt into automatic backup after granting persistent read and write access to a shared local phone folder through Android. The app saves verified copies in the TAS Time & Calc subfolder daily or weekly; Android may delay execution. You can turn this off. The app stores the chosen destination, frequency, timestamps and any error status locally. To upload copies to your own cloud, you separately configure a suitable synchronisation app or cloud function; the chosen service processes those files under its own terms. This local-folder route does not provide cloud synchronisation and does not confirm completed cloud uploads. Until upload finishes, a locally saved copy does not protect against loss of the device. Folder access must be granted again after reinstallation or on another device. Android system backup is disabled in the app manifest; any transfer performed by device software depends on that software's capabilities and settings. An app backup contains calculator data and settings, not purchase, gift or reviewer licences. The app does not encrypt these backup files itself. Choose storage and recipients you trust. Before restoring a backup, the app creates a local safety copy of the previous calculator data. Shared calculations and files go to the recipient you select; Tempo Apps Studio does not automatically receive a copy.
Optional Google Drive backup and restoration from 0.2.9
Google Drive is optional. Use your own Google account for automatic backups and restoration. If needed, create the account yourself and set up Drive before connecting it in the app. Internet and sufficient free Drive storage are required. Other offline features do not require a Google account.
With your permission, TAS Time & Calc writes backup files directly to your Google Drive over HTTPS and reads its own copies back for verification and restoration. The limited Google permission covers files created by the app or specifically made accessible to it. Tempo Apps Studio does not receive or host these copies on a developer server.
Copies contain saved calculations and histories, favourites/scenario names, calculator memory, saved scientific input/formulas/programs and necessary settings, including language, appearance and backup frequency. Purchase receipts, licences/trial state, access tokens, linked account details and device-bound permissions are not transferred as authorisation. Rights already present on the restore device are preserved; Google Play purchases are restored through Google Play. Unsaved screen drafts and internal usage counters are excluded.
The account address and a Google account identifier are stored locally for the chosen connection. Access tokens remain in memory/Google Play services and are not written to backup files or logs. Automatic backup is off by default, with daily/weekly scheduling and a manual save action. Android may postpone execution. Success is shown only after writing and reading the copy back. This is not live synchronisation.
Backup files have no additional password encryption provided by this app. Protect your Google account and do not share the files. Older copies are not automatically deleted. Disconnecting stops Drive backups and removes local connection details; existing cloud copies and Google permissions remain. Delete copies in Google Drive and revoke access in your Google account when desired. Existing local/manual backup routes remain separately accessible. Restoration replaces current calculator data/settings after confirmation and creation of a local safety copy. Automatic Drive backup is turned off until deliberately re-enabled. On another phone, install the same app, connect the same Google account and authorise it again.
Google user data is used only for the selected account connection, backup verification and restoration. It is not sold or used for advertising. Use and any transfer of data obtained through Google APIs follow the Google API Services User Data Policy, including its Limited Use requirements. Google processes data within its own service under its privacy policy.
Calendar and external links
This version does not read or synchronise a calendar and does not request calendar, contacts, location, camera or microphone permissions. Websites and social services open only when you choose a link; their own privacy terms apply.
Retention, deletion and support
Local data remains until you delete or replace it, or clear the app's data. The local safety copy can remain until a later restore replaces it or the app's data is cleared. Clearing Android app data or uninstalling the app removes its internal storage. You separately delete automatic backups in the selected shared phone folder, manually exported files, cloud copies and information held by recipients at the relevant destination. The app does not delete completed automatic backup copies itself; check available storage and the retention and deletion settings of any synchronisation service you use. Reinstallation may create a new installation code and require a replacement personal gift code. Google manages Play purchases and reviews; clearing local app data does not delete a Play transaction. You can delete reviews through your Google Play or Google account. Google applies its own retention periods to its services. If you email us, we receive your address and the information you choose to send. We use it to handle your request and keep it only as long as needed for that purpose, follow-up questions and applicable obligations. Please do not send payment card details or unnecessary personal content. You may contact us to request access, correction or deletion of information we hold about you; legal obligations may limit deletion. You may also contact the competent data protection authority.
Security and changes
Android and your device security protect local app storage. Google describes its update and review traffic as encrypted. Security at export destinations depends on the destination you choose. We will update this policy when the app's data processing changes.