Your material.
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Study AI with suitable privacy

At launch, cloud AI and credit purchases are available only to adults aged 18 or over. Ages 13–17 can use local practice; cloud AI and purchases remain unavailable until required OpenAI project privacy settings and safeguards for minors are verified. A parent or legal guardian’s declaration is not identity verification. Local practice works without an account. We save declared age group, permission status, notice version and acceptance time with the AI account; no birth date or parent details are collected. Delete AI account withdraws permission and removes those records. OpenAI screens source text and results for study safety; we retain only daily aggregate safety counts, without content or learner identity. Do not upload personal information about yourself or others. Report unsuitable results to support without private material. For a personal safety concern, speak with a trusted adult or local emergency services.

Your library stays with you

Imported documents, cards, drafts, review dates and saved answers are stored on your device. Drafts may include pages you did not select for question creation. Automatic app backup and device transfer are disabled on Android; deliberate library exports remain available and should be stored privately. On Apple devices, device backups may include app data.

Material sent to AI

Question creation sends the source excerpts you select. An answer check sends the source excerpt, question, card answer and the answer you typed. Each action has separate approval in the app. With AI credits and pilot access, content passes through Reviso’s server to OpenAI. For credit-task recovery, approved content and results remain in active server storage for up to 24 hours from task creation, then are removed. An approved request may also remain temporarily on your device to finish after an interruption.

Sign-in, purchases and credits

Apple sign-in does not request your name or email. Google sign-in requests basic profile information only, without Gmail or file access. Reviso uses the stable account identifier and does not store your name, email or profile photo on its server. On iOS, the Google SDK profile cache is cleared after sign-in. Reviso keeps its own sign-in access securely on each platform. Google processes sign-in and connection information, including account identifier and IP address that may estimate coarse location for fraud prevention, plus technical SDK and device-environment information under its own policy. Google sign-in privacy disclosure. We retain the identity provider and hashed provider account identifier, internal account identifier, secure sign-in access, purchase identifiers, products, balance and credit changes. Task times, types, statuses and expenditure counters support service operation, duplicate-charge prevention, balance recovery and refunds. A trial-claim record limits the free trial to once per account. These records are not automatically deleted after 24 hours; that limit applies to task content and results.

On-device recognition and SDK diagnostics

Android uses the bundled Google ML Kit text-recognition SDK to read supported scanned pages on the device. Google documents that its SDK sends diagnostic and usage information over HTTPS, including device and app information, per-installation identifiers, timing, feature/API events, configuration, input/output sizes and error codes. These diagnostics differ from the study text you separately approve for cloud AI. See Google’s ML Kit data disclosure and Google’s privacy policy.

Cloud processing

Reviso’s service is hosted on Cloudflare. We ask OpenAI not to store the response for API retrieval. This does not mean providers retain no data: their own policies govern processing and retention. OpenAI API data policy.

Pilot and personal API key

The pilot stores a hashed invitation identifier, expiry, allowance and request records without study text or results; these are not automatically removed when the pilot ends. Your invitation code is stored in the device Keychain and authenticates with Reviso. It is not included in an exported library backup. If you separately choose a personal OpenAI key, it is sent directly to OpenAI and usage is charged to your own API account.

Account deletion and your material

Choose Delete AI account in AI settings to revoke sign-in and remove study content and results from active server storage. Pseudonymous purchase and credit records remain for refunds and balance recovery, and the trial-claim record remains to prevent repeated claims. Material on your device stays until removed separately. External providers and backups have their own retention policies. Removing a pilot code does not delete pilot records. For questions or privacy requests, contact yairsabag@gmail.com.

To request deletion without reinstalling Reviso, email a Reviso account deletion request. We may ask you to verify account ownership before acting. Do not send passwords, sign-in tokens, payment details or study files. State whether you signed in with Google or Apple; support will explain any further verification needed. The purchase, credit and trial records retained for refund handling and fraud prevention are described above.