Privacy policy

Effective date: 11 November 2026

HiMint is an AI language practice service operated by Yu Suet Li, the operator of Klaro. This policy covers the HiMint iPhone app, its backend and himint.app. For privacy requests, contact support@klaroinvest.com and include “HiMint” in the subject.

What we process

• Account information: your email address, password hash, authentication sessions and, if you choose Sign in with Apple, the identifier and information Apple provides.
• Learning content: goals, profile details, messages, voice audio, transcripts, assessment observations, practice history, feedback and memories used to personalise practice.
• Service records: consent choices, credit usage, purchase and subscription identifiers, timestamps, IP addresses and technical logs needed for operation, security and troubleshooting.

We use these data to authenticate you, provide and personalise language practice, deliver verification messages, manage purchases, secure the service and respond to your requests. Please avoid sharing unnecessary sensitive information about yourself or other people in conversations.

AI and voice processing

Mint is AI, not a human teacher. With your agreement in the app, learning content, including voice audio and transcripts, is sent to OpenAI to run conversations, transcribe speech, assess responses and generate feedback. Context from your learning record may accompany a request. AI observations can be inaccurate; they are not certifications or professional advice.

The microphone is used when you start a voice activity and grant permission. Processing audio is separate from choosing to retain recordings for replay. You can turn off retained recordings in Settings. Turning this off does not prevent audio processing during a voice session you start.

Providers and international processing

OpenAI processes AI requests; Resend delivers account emails; Cloudflare provides website hosting, network protection and backup infrastructure; Apple provides app distribution, optional Apple sign-in and purchases. These providers receive the information needed for their roles and may process it in countries other than where you live. Their own policies also apply to their services.

We do not sell your personal information or use practice content for targeted advertising. This website has no advertising pixels, third-party analytics or mailing-list form. Cloudflare still processes network information when serving the site.

Storage and retention

Account and learning records are retained while needed to provide your account and practice history. If you enable recording retention, retained recordings expire after up to 180 days. Temporary assessment audio is used while processing your assessment and is cleared when no longer required by that processing flow. Transcripts and feedback form part of your learning record.

Deleting an account removes its active account and learning records. Backup copies may still contain earlier records until those backups are replaced or removed. They are restricted to recovery and are not used to continue teaching a deleted account. Provider-side retention follows the provider’s applicable policies. We may retain limited records where required for legal obligations, security or resolving a dispute.

We use HTTPS for public service traffic, password hashing, access controls and encrypted off-device backups. No system can guarantee absolute security.

Your choices and requests

• Use Settings to change recording retention, export your learning record, sign out or delete your account.
• Ask Mint to correct or forget a saved memory. Contact support if a change does not take effect.
• Contact support@klaroinvest.com to request access, correction or deletion, or to withdraw consent. We may need to verify account ownership. Some processing is necessary to provide the service, so withdrawal may prevent further use.

Deleting the app alone does not delete your account. Deleting an account does not cancel an Apple subscription; manage subscriptions in your Apple account settings.

Adults and policy changes

HiMint is intended for adults aged 18 or older. We do not intentionally offer it to children. If you believe a child has supplied personal information, contact us. We will publish changes to this policy here with an updated date and provide additional notice when appropriate.