Which versions this policy covers

Calculation, graph, matrix, optimization, and practice screens do not display ads in any build.

Calcademy 1.9.5 (build 30) is a corrective release: it fixes calculus and graph rendering defects, matrix cell input, and the placement of the branch-and-bound node details sheet. It adds no permission, no additional third-party SDK, and no new data processing compared with 1.9.4.

Calcademy 1.10.0 (builds 31–32) adds the offline Quiz practice module. Build 32 rewrites that question bank as rule recall rather than worked exercises, which changes the questions shown and nothing about how they are processed. The question bank ships inside the application; questions are drawn, answers are graded, and scores are calculated entirely on the device, with no network call and no backend. The module adds no permission, no additional third-party SDK, no account, and no new stored or transmitted data compared with 1.9.5.

Calcademy 1.10.1 (build 33) went to internal testing only and is superseded; it still offered the Quiz practice module and carried the calculator defect described below.

Calcademy 1.10.2 (build 34) is the first production build of this line and a corrective release: it addresses the scientific calculator layout, where the keypad could push the expression display and the result off the top of the screen. That fix turned out to be partial and is completed in 1.10.3. It also withholds the Quiz practice module. That module's code is compiled into the package, but every entry point to it — the home category, the quick-access tile, the module search result, and the category filter — is withdrawn, and the application declares no deep link, so the module cannot be started. 1.10.2 adds no permission, no additional third-party SDK, and no new data processing compared with 1.9.5.

Calcademy 1.10.3 (build 35) is a further corrective release for the same defect. The scientific calculator now sizes its keypad, its expression display, and its result panel to the screen it is actually on, so every key stays reachable at the display sizes, text scales, and navigation modes where 1.10.2 still cut the bottom rows off. It touches layout only: no calculation behaviour, permission, third-party SDK, stored field, or transmitted value changes from 1.10.2.

In-app access

Calcademy includes a localized About & Legal screen with an on-device summary of current data handling, local storage, the Google AdMob disclosure, educational use, and the financial disclaimer. It is reachable from Home and Settings and provides an external-browser action for the public policy URL.

The local summary remains available alongside the public policy link. The production Android manifest for builds 28–35 includes the advertising and technical permissions described in “Network access and sharing” below.

Data stored on the device

Calcademy may store the following locally with Android application storage and SharedPreferences:

• application preferences such as theme, language, angle mode, precision, haptic feedback, and key sound;
• calculation history and user-selected saved calculations;
• saved graph, matrix, and optimization workspaces supported by the current application;
• titles, notes, favorites, compact input/result summaries, and timestamps attached to saved items.

Quiz sessions are deliberately absent from that list. A session's questions, submitted answers, score, and review list exist only in memory while the session is open, and are discarded when it ends or the app is closed. Calcademy 1.10.0 and 1.10.1 keep no quiz history and transmit no quiz answer or result anywhere, and 1.10.2 and 1.10.3 do not offer the module at all.

Calcademy does not upload this content to its own server and does not offer an account or cloud synchronization. The Android configuration for Calcademy 1.9.4–1.10.3 (builds 28–35) excludes application data from Android Auto Backup, cloud backup, and device-to-device data transfer. When the app is uninstalled or its storage is cleared through Android Settings, on-device Calcademy data is removed and cannot be restored by Calcademy. The app does integrate the Google AdMob advertising SDK (see “Advertising” below).

Calcademy does process user-entered expressions, values, matrices, models, notes, and result data locally to provide its calculation and saved-work features. “No developer collection” does not mean that the app performs no data processing on the device, nor that Google AdMob performs no processing for advertising.

Advertising (Google AdMob)

Calcademy displays banner advertisements through the Google AdMob SDK, on the Home and Saved screens only.

The Google Mobile Ads SDK may automatically collect IP address, approximate location inference, app interactions, diagnostic and performance information, and advertising, device, or account identifiers for ad delivery, measurement and analytics, frequency capping, and fraud prevention, and may share this data with Google and advertising partners under Google's own policies ↗. Google protects these transfers with TLS. Calcademy does not add the user's calculations or saved-work content to an ad request.

Consent (Google UMP). Where consent is required, Google's User Messaging Platform (UMP) collects the user's choice before any ad is requested. Declining consent restricts the use of personalised advertising; however, it does not mean that all technical processing—such as IP address, app interactions, diagnostic information, and fraud-prevention signals—stops. Where UMP reports that consent is required, the choice may be reviewed or changed through Ad privacy options in Settings. The change is applied to the Google Mobile Ads SDK's next eligible advertising operations. Nothing in Calcademy is withheld for declining consent, and no feature is locked behind consent.

Where local law does not require consent, Google reports that none is needed and no form is shown.

The third-party involved is Google AdMob. Calcademy does not add Firebase, Google Analytics, or any analytics/crash-reporting SDK.

Network access and sharing

The production Android manifest includes INTERNET, ACCESS_NETWORK_STATE, the Google advertising ID (AD_ID), and Android Privacy Sandbox ad-services permissions for ad delivery. Google Mobile Ads and Android runtime components may also merge technical permissions such as WAKE_LOCK and FOREGROUND_SERVICE into the manifest. The app does not request permission to access the camera, microphone, location, contacts, calendar, or device files.

When the user chooses Copy or Share, selected text may be written to the system clipboard, or a generated graph image may be passed through the Android share sheet to an application chosen by the user. Calcademy does not send this content to its own server; the privacy terms of the operating system and receiving application apply. Calcademy never initiates that transfer without the user's action.

Data deletion

History and saved items can be deleted individually or within a supported category by using the available deletion actions on the relevant screens. Deletion actions in Settings clear only the data category identified on screen. To remove all on-device Calcademy data, application storage can be cleared through Android Settings or the app can be uninstalled. Calcademy application data is excluded from Android cloud backup and device-to-device transfer.

There is no account and no server-side profile, so there is nothing to request deletion of from a server.

Advertising identifiers are controlled through Android system settings rather than through Calcademy.

Children and sensitive data

Calcademy is an academic tool and is not designed to collect personal or sensitive information. Users should not place personal, confidential, financial-account, or health information in titles, notes, expressions, or saved calculation fields.

Financial disclaimer

Financial tools are provided for education and general calculation only. They are not financial, investment, tax, or legal advice. Results depend on user inputs and numerical methods.

Artificial intelligence

Calcademy 1.9.4–1.10.3 (builds 28–35) contains no artificial intelligence feature. Calculation, graph, matrix, and optimization results are produced by deterministic numerical methods running on the device; they are not generated by a language model. The Quiz practice module added in 1.10.0 draws its questions from a fixed question bank shipped inside the application and grades them on the device. Expressions, values, matrices, models, titles, notes, saved calculations, and quiz answers are not sent to an artificial intelligence service and are not used to train an artificial intelligence model.

Development disclosure: parts of Calcademy's source code were written with the assistance of artificial intelligence coding tools (OpenAI Codex and Anthropic Claude). These tools are used only during development, on the publisher's own systems, and have no access to user data, to the device, or to the application at runtime. Code produced with their assistance is reviewed by the publisher before release.

The remote AI assistant referred to under “Future features” is not enabled in these versions. If it is enabled in the future, this policy and the Google Play Data Safety declarations will be updated before any related data processing begins and before the relevant version is released.

Future features

Calcademy 1.9.4–1.10.3 (builds 28–35) does not include Supabase, accounts or sign-in, in-app purchases or subscriptions, remote AI, camera access, analytics, or a crash-reporting SDK. If any of these features is enabled in the future, this policy and the Google Play Data Safety declarations will be updated before data processing begins and before the relevant version is released. Where required, consent controls will be implemented before collection begins.

Changes

Material changes will be reflected by updating this policy's effective date and publication text.