Last updated: October 24, 2026
This policy covers AI Grader Go for iPad, published by BridgeAIWorks (Yung-Hsin Shieh).
1. Summary
AI Grader Go is a grading app for teachers. It has no accounts and no BridgeAIWorks server. We do not receive your exams, your students' work, their names, their grades, your class lists or your keys. The app contains no analytics, no advertising and no tracking.
Your data is kept inside the app on your iPad. The app does not use iCloud sync. Like other app data, it is included in your iPad's backups (iCloud Backup or a computer backup) if you have turned backups on.
Data leaves your iPad only when you start one of these actions:
- AI grading and other AI tasks. Images of students' answers, with the name area of each page blanked out, go directly to Google Gemini, using your own Google API key (Section 5).
- Sending grades by e-mail. Reports go from your own mailbox to the recipients you choose (Section 6).
- Exporting or sharing files. Files go wherever you send them (Section 8).
Student names and student numbers on the paper are read on the iPad itself and are not sent to the AI (Section 4).
AI scores are suggestions and can be wrong. The app is built so that the teacher reviews every result before it is used.
2. Who is responsible for what
- You and your school decide which students' work is graded with the app and why. Under most data protection laws the school or teacher who makes that decision is responsible for the student data (often called the "controller"). Please follow your school's rules.
- BridgeAIWorks writes the software. Because no student data ever reaches us, we do not store or process it on anyone's behalf.
- Google processes what you send to Gemini, under the agreement between you and Google (Section 5).
- Your e-mail provider carries the e-mails you send, under your agreement with that provider (Section 6).
- Apple handles purchases and subscriptions (Section 9).
3. What the app stores on your iPad
- Class lists: student names, student numbers and, if you add them, student e-mail addresses.
- Scanned papers and page images, and any pages you re-shoot with the camera.
- Exams, questions, answer keys and rubrics.
- AI replies, scores, comments, the evidence the AI quoted, your Apple Pencil marks and your review decisions.
- Reports, the e-mail send log, cost estimates, the count of pages graded this week, and your settings.
Your Google API key and your e-mail passwords are stored in the iPadOS Keychain on this iPad only. They are never sent to BridgeAIWorks.
The app's files are stored inside the app's own container and protected by iPadOS Data Protection. You can also turn on a Face ID, Touch ID or passcode lock for the app.
4. Names and student numbers are read on the iPad
To match each paper to a student, the app reads the name and student number written in the header of the paper. This is done on the iPad by Apple's Vision framework, using only the header area. The result is compared with your class list; when the match is uncertain, you choose the student yourself. Names and student numbers read this way are not sent to Google or to us.
Before a page image is sent to Gemini, the app blanks out the header area where the name and student number are written.
Please note: if a student writes a name or other personal details inside an answer area, that part of the page is sent as written, because the AI has to read the answers.
5. Google Gemini: what is sent, when, and under whose terms
Nothing is sent until you allow it. Before the first AI task, the app shows what will be sent and asks for your permission. You can withdraw permission at any time in the app's Settings; AI features then stay off until you allow them again.
What is sent, by task:
- Grading: images of the students' answer pages with the header area blanked, close-up crops of answer areas that the app checks again, and your rubric, questions and answer key, together with the app's grading instructions.
- Drafting a rubric: the exam paper or question file you choose.
- Class analysis and student summaries (optional): scores, step-by-step results and grading comments. Names and student numbers are replaced by codes such as S1 and S2; the table that links codes to students stays on your iPad.
How it is sent. Requests go directly from your iPad to Google's Gemini service over an encrypted connection. They do not pass through BridgeAIWorks. Your API key identifies your own Google Cloud project, and Google also receives the technical information that every internet request carries, such as your IP address. Each AI task that Google charges for shows an estimated cost first. Gemini usage is billed to you by Google; it is not part of the App Store subscription.
What Google does with it. What you send is handled under the Gemini API Additional Terms of Service and Google's Privacy Policy, under your own account with Google. Google treats two kinds of use differently:
- Unpaid use (a key from a project without billing): Google may use what you send to improve its products, and human reviewers may read it. Google asks users not to send sensitive, confidential, or personal information to its unpaid services. In the European Economic Area, Switzerland, and the United Kingdom, Google applies the paid-service data terms even when a service is offered free of charge.
- Paid use (a key from a Google Cloud project with billing enabled): Google states that it does not use your prompts or replies to improve its products, keeps them for a limited time to detect abuse and meet legal requirements, and processes them under its data processing terms.
Because students' work is personal data, use a key from a project with billing enabled. In the European Economic Area, Switzerland and the United Kingdom, Google's terms allow apps to use only the paid service. You can read Google's current terms at https://ai.google.dev/gemini-api/terms.
What we cannot do. BridgeAIWorks cannot see, retrieve, correct or delete anything held by Google. To have content removed there, use your Google account's controls or contact Google. Withdrawing permission or removing the key in the app stops future requests; it does not affect what was already sent.
Your school's rules. Before you send students' work to an AI service, check that your school's rules and local law allow it, and inform students or parents as your school requires.
6. Sending grades by e-mail (optional)
If you set up a mailbox in Settings, the app can send grade reports to the students on your class list. Messages are sent through your own mail server (for example your school's Gmail or Microsoft 365 account, or another server you enter), signed in with your own account. A copy is sent to you by default so that you keep a record.
A message contains the text you write and, if you choose, the student's report as a PDF attachment, which can be password-protected. When a PDF is protected, the e-mail explains the password rule but never contains your passphrase.
The app keeps a send log on your iPad (sent, failed, no address). Delivered messages are handled by your mail provider and the recipients' providers under their own terms. BridgeAIWorks does not receive them. For a single message you can also use the iPad's own Mail app instead.
7. Camera
The app asks for camera access only when you choose to re-shoot a page. You can say no, or turn it off later in iPadOS Settings; everything else keeps working. Photos you take are stored inside the app with the rest of that exam. Files are imported through the system file picker, the share sheet or drag and drop, which hand the app only the files you choose.
8. Files you export or share
Graded PDFs, score lists (CSV or Excel), class reports and exam packages leave the app only when you export or share them. Once you send them somewhere (Files, AirDrop, a USB drive, another app), they are handled by that destination, not by AI Grader Go.
9. Subscriptions and purchases
Subscriptions, free trials and payments are handled by Apple through the App Store. BridgeAIWorks does not receive your payment details or your Apple Account information. Apple provides us with sales reports; these do not contain your exams or your students' data. The weekly count of graded pages is kept only on your iPad and is not sent to us. You can manage or cancel your subscription in your App Store account settings.
10. No analytics, advertising or tracking
The app contains no analytics SDK, no crash-reporting SDK and no advertising SDK, and it does not track you across apps or websites. It does not use the advertising identifier.
If you have chosen in iPadOS Settings to share analytics with app developers, Apple may give us crash reports and technical diagnostics under Apple's privacy policy. We use them only to fix problems.
11. Software that runs on your iPad
The app includes open-source software that runs entirely on the iPad and sends nothing anywhere: the Python interpreter, SymPy and mpmath (used to check mathematical expressions), and MathJax (used to display formulas). Their licences are listed in the app.
12. How long data is kept, and how to delete it
- On your iPad: data stays until you delete it. You can delete a student, a class, an exam or a grading batch in the app, and clear temporary files on the storage page. Deleting the app removes its data from the iPad.
- Keys and passwords: remove your API key and mail passwords in Settings before deleting the app; iPadOS may keep Keychain items after an app is deleted.
- Backups: your iPad backups keep copies of app data until those backups are replaced or deleted, according to your backup settings.
- Google: what was sent to Gemini is kept according to Google's terms for your type of use (Section 5).
- E-mail and exports: copies in mailboxes and exported files stay where they were sent.
- BridgeAIWorks: we hold none of this data, so there is nothing for us to keep or delete.
Students or parents who want to see, correct or delete their data should contact the teacher or school, who hold it. We cannot retrieve it.
13. Children and students
AI Grader Go is a tool for teachers and other adult educators. It is not directed at children, and students do not use the app. The app processes students' work, and many students are minors; the school and the teacher are responsible for having a lawful basis for that, and for giving the notices or obtaining the consents their local laws and school rules require.
14. Security
Connections to Google and to mail servers are encrypted (TLS); the app refuses to send a mail password over an unencrypted connection. Keys and passwords are kept in the Keychain. Please protect your iPad with a passcode, keep iPadOS up to date, and take care with files you export.
15. Changes to this policy
When this policy changes, the "Last updated" date changes with it, and material changes are described on this page.
16. Contact
Publisher: BridgeAIWorks (Yung-Hsin Shieh)
Privacy questions: support@bridgeaiworks.com
Support: https://bridgeaiworks.com/support/