Privacy Policy
Effective date: October 22, 2026
akin.ai.app ("we", "us") sets out below its Privacy Policy (this "Policy") concerning how we handle users' personal information in "Exevoice" (the "Service") that we provide.
Article 1 (Personal information)
"Personal information" means personal information as defined in the Act on the Protection of Personal Information: information about a living individual that can identify that specific individual by the name, date of birth, address, telephone number, contact details or other description contained in it, together with information that can identify a specific individual on its own (personal identification codes), such as data on facial appearance, fingerprints and voiceprints, and the insurer number on a health insurance card.
Article 2 (Information we collect and how we collect it)
In providing the Service, we collect the following information.
Information stored on our servers
- Email address (obtained through registration with an email address, Google login, or Sign in with Apple. If you choose "Hide My Email" in Sign in with Apple, this is the relay address issued by Apple)
- Session record text (structured text organized by AI from your recorded audio: summary, your words, physical, memory, share text and so on)
- Full session transcript (the full text after the transcription of your audio has been corrected for notation, and before AI summarizes and organizes it. Notation correction is done only for recordings in Japanese; for recordings in English it is the transcription itself. It is not shown in the app screens and is used only as an internal reference when generating features that look back and observe across your accumulated records)
- Session date and recording length
- Purchase history and subscription status for users on paid plans (obtained via RevenueCat)
- Record of consent to sending data to outside AI services (the date and time of consent, the version of the disclosure shown at that time, and the dates and times you withdrew and gave consent again)
Information collected automatically as you use the Service
- Device information (OS version, device type and so on)
- Usage logs (access date and time, feature usage and so on)
- Error information (crash reports and so on)
Information we do not store on our servers
The Service does not store on our servers the audio you record, or the transcribed text before notation correction. These are sent temporarily to outside AI processing services and are discarded once processing finishes. See Article 4 for details.
The Service records what you choose to say, and what you say may include references to bodily sensations or how you are feeling physically. We do not actively collect or analyse these as information for medical or health management purposes; we treat them as part of your own journal for looking back.
Article 3 (Purposes for collecting and using personal information)
We collect and use personal information for the following purposes.
- To provide and operate the Service
- To provide features that look back and observe across your past session records
- To respond to your enquiries
- To send notices about new features, updates and the like for the service you use (advertising email, such as campaigns or information about other services we provide, is sent only where we have obtained your consent in accordance with law, and you can stop receiving it at any time)
- To contact you as necessary, for maintenance and important notices
- To identify users who breach the Terms of Service or who try to use the Service for improper or unjust purposes, and to refuse them use
- To let you view, change or delete your registered information and view your usage
- For purposes incidental to the above
Article 4 (Handling of audio data and what you say)
Prior consent to sending data to outside AI services
Before sending your data to the outside AI services described below, we disclose in a screen inside the app the types of data sent, the names of the companies they are sent to, and the purpose of sending, and we obtain your consent.
If you do not consent, no recording or transcription takes place and no data is sent to outside AI services at all. Even then, you can still read the session records already stored, as before.
You can review what was disclosed at any time from "About AI processing" in the app's settings screen. The record of consent (the date and time, and the version of the disclosure) is stored on our servers.
You can withdraw your consent at any time from the same screen. After you withdraw it, and until you consent again, no new recording, transcription or generation of monthly reflections is started and no new data is sent to outside AI services (except for processing already under way at the moment you withdraw). You can still read the session records already stored, as before. The dates and times you withdrew and gave consent again are also kept as part of the record of consent.
Audio and pre-correction text are not stored
The Service does not store on our servers the audio you record or the transcribed text before notation correction. They are processed as follows.
1. The recorded audio is sent through our servers to OpenAI's Whisper API, which produces transcribed text. The audio is never stored on our servers.
2. The transcribed text is corrected for notation using a dictionary we maintain, then sent to Anthropic's Claude API, where it is organized into structured text (the "session record"): summary, your words, physical, memory, share text and so on.
3. The audio is discarded once transcription finishes, and the transcribed text before notation correction is discarded once the session record has been generated. The recording file left on your device is also deleted once transcription finishes.
4. After a month has ended, when you open that month's reflection, that month's session records (as edited by you, if you edited them) and the full transcripts after notation correction are sent to Anthropic's Claude API to produce observations and questions across the month (the "monthly reflection"). Monthly reflections are stored in the same way as session records, described below.
Storage of session records and full transcripts
Session records, full transcripts after notation correction, and monthly reflections are stored in the Asia Pacific (Tokyo) region of Supabase, linked to your account. In the app, only you can read your own records.
This content is stored encrypted with a key specific to you, in a form that cannot be read from the admin console or the database. The encryption keys are managed separately from the database and are used only for the functions of the Service (showing your records in the app and generating monthly reflections). Records saved with versions of the app from before encryption was supported (version 1.3.4 and earlier) will be encrypted progressively. Information other than what you said (session dates, recording lengths, language, when a record was edited, the month and count for monthly reflections, usage counts, and which account a record belongs to) is not encrypted.
The full transcript is not shown in the app screens and is used only as an internal reference when generating features that look back and observe across your accumulated records. We do not actively read or analyse individual content.
About training use at outside AI services
We use the OpenAI and Anthropic APIs in a way that your input is not used to train their machine learning models. However, temporary retention and processing by each company for purposes such as preventing abuse, ensuring safety and complying with law are governed by that company's API terms and policies. Please refer to each company's API usage policies for details.
About references to your body and physical condition
What you choose to say may include descriptions of your body: its state, sensations, discomfort and so on. We state the following about such descriptions.
- We do not provide medical advice, diagnosis or treatment suggestions through the Service. Text organized by AI is your own speech structured so that it is easier to read back; it is not intended to be used as a basis for medical judgement.
- The Service does not connect with Apple HealthKit or any other health data platform, and does not obtain health data such as heart rate, step count or sleep.
- What you say is stored as your own journal for looking back, and we do not actively analyse or profile it.
- We do not sell or share what you say for advertising purposes.
- If you need a basis for your own judgement about poor condition, pain or symptoms, please always consult a medical institution.
About the share feature
If you choose to publish content to an outside service (such as X) using the share feature, that content becomes public information and is handled in accordance with the privacy policy of that outside service. Managing or deleting it after sharing is your own responsibility.
Article 5 (Outside services and transfer of information overseas)
We use the following outside services in providing the Service. In these services, your information may be stored and processed on servers located in the country where the service is based.
Supabase Inc. (United States)
Database and authentication. The data storage region is Asia Pacific (Tokyo).
Privacy policy: https://supabase.com/privacy
RevenueCat, Inc. (United States)
Managing purchases of paid plans (auto-renewing subscriptions) and checking subscription status. We do not obtain payment information such as credit card numbers.
Privacy policy: https://www.revenuecat.com/privacy/
OpenAI, L.L.C. (United States)
Transcribing audio (Whisper API). We send data with settings that exclude it from training.
Privacy policy: https://openai.com/policies/privacy-policy
Anthropic, PBC (United States)
Organizing transcribed text, and producing monthly reflections (Claude API). We send data with settings that exclude it from training.
Privacy policy: https://www.anthropic.com/privacy
Google LLC (United States)
Authentication service (Google login), and sending, receiving and storing enquiry emails (Gmail).
Privacy policy: https://policies.google.com/privacy
Apple Inc. (United States)
Authentication service (Sign in with Apple), and purchase and payment of paid plans (App Store).
Privacy policy: https://www.apple.com/legal/privacy/
Mixpanel, Inc. (United States)
Analysis of how the Service is used. We send your user ID, records of actions in the app (such as screens shown, recordings started and completed, and actions on the plans screen), recording length, character counts, language, the type of app build, types of error and so on. We do not send audio, what you say, or your email address.
Privacy policy: https://mixpanel.com/legal/privacy-policy/
Sentry (Functional Software, Inc.) (United States)
Recording and analysing errors. We send the content of crashes and exceptions, technical information such as the device and OS, and where the error occurred; for some server-side errors we include your user ID. We do not send audio, what you say, or full transcripts.
Privacy policy: https://sentry.io/privacy/
Of these companies, we entrust Supabase, RevenueCat, OpenAI, Anthropic, Mixpanel and Sentry with the handling of personal information to the extent necessary to provide the Service (storing data, managing billing, AI processing, analysing errors, analysing usage and so on). In doing so, we have data processing agreements with each company that set out handling only within the purpose entrusted, security, management of sub-processors, deletion at the end of the relationship and so on, and we have confirmed that a system meeting the standards set by the rules of the Personal Information Protection Commission is in place. We also review these and the personal information protection system of the destination country (the United States) about once a year, and supervise them as necessary and appropriate. Information about these measures is available on request from the contact in Article 10.
Information handled through the authentication services of Apple Inc. and Google LLC, the App Store, and enquiry email (Gmail) is governed by the terms and privacy policies set by each company.
Separately, for the sending of audio and transcribed text to OpenAI and Anthropic, we disclose what is sent inside the app and obtain your individual consent, as set out in Article 4.
Article 5-2 (Handling of payment information)
Purchase, payment, billing, refunds and cancellation for the paid plans of the Service all take place through the App Store mechanisms provided by Apple Inc. We do not obtain any information about your credit card number, bank account or other payment methods.
What we obtain is the content of notifications about purchases, renewals, cancellations and the like, by way of Apple and RevenueCat. This includes, for example, the following information.
- The name of the plan you are subscribed to
- The contract start date, renewal date and end date
- The identifier of the purchase transaction
- Purchase information that RevenueCat includes in its notifications, such as price, currency and country or region
We use this information to determine whether you are in a state where you can use the features of a paid plan, and as a record for responding to inquiries about billing.
For details of paid plan fees, how to cancel, refunds and so on, please also see Article 10 of the Terms of Service.
Article 6 (Provision of personal information to third parties)
Except in the following cases, we do not provide personal information to third parties without obtaining your consent in advance.
- Where required by law
- Where it is necessary to protect a person's life, body or property and it is difficult to obtain the person's consent
- Where it is particularly necessary to improve public health or promote the sound growth of children and it is difficult to obtain the person's consent
- Where it is necessary to cooperate with a national government body, a local government, or a party commissioned by them, in carrying out duties prescribed by law, and obtaining the person's consent risks impeding those duties
Entrusting the handling of personal information to the companies listed in Article 5 is not provision to third parties under this Article.
Article 6-2 (Sale and tracking)
We do not sell your personal information. We also do not allow third parties to collect, through the Service, information for tracking you across different websites or services. The Service does not respond to "Do Not Track" signals from browsers and the like (because the Service does not track you across websites or services).
Article 7 (Data retention period)
We retain your account information, session records and full transcripts for as long as you hold an account.
If you delete your account from the "Settings" screen in the Service, we immediately delete from our database your account information, session records, full transcripts, monthly reflections, usage records, records of purchase and renewal notifications, and your record of consent to sending data to outside AI services. Deleted data cannot be restored.
However, we may retain the following information to the extent necessary.
- Information whose retention is required by law
- Information anonymised as statistical data
Note that information already provided to the outside services listed in Article 5 may continue to be retained by those companies in accordance with their own policies and retention periods, even after deletion from our database.
Note also that the period during which you can access past session records on our Service may differ depending on your plan (free or paid). Records beyond the accessible period are still retained as data for as long as you hold an account.
Article 8 (Disclosure, correction and suspension of use of personal information)
In accordance with law, you may ask us to notify you of the purposes of use of your retained personal data, to disclose it (including records of provision to third parties), to correct, add to or delete it, to suspend its use or erase it, and to stop providing it to third parties.
Deleting your account and the data linked to it: you can do this yourself at any time by choosing "Delete account" from the "Settings" screen in the Service. Handling is as set out in Article 7.
For other requests (disclosure, correction, suspension of use), please contact us by email at the address below.
Contact: exevoice.app@gmail.com
We will respond without delay in accordance with law after confirming that the request comes from you. If we cannot meet a request, we will tell you why. We do not charge a fee.
Article 8-2 (Security measures)
To prevent leaks of personal information and the like, we take the following measures.
- The database separates read permissions for each user, so that you can read only your own records
- Communications are encrypted (HTTPS)
- Session records, full transcripts and monthly reflections are stored encrypted with a key specific to each user (Article 4)
- Credentials such as the keys for using outside AI services are not kept in the app but managed on the server side
- Recorded audio is not stored (Article 4)
- Outside services are selected and supervised as set out in Article 5
Details of other measures are available on request from the contact in Article 10.
Article 9 (Changes to this Privacy Policy)
We may change this Policy as needed, such as when the law changes or the features of the Service change. When we do so, we will announce the content of the changed Policy and the date on which it takes effect, before that date, within the Service or on our public website. Where the law requires your consent for a change, we will apply it only after obtaining your consent.
Article 10 (Contact)
For enquiries about this Policy, please contact us at the address below.
akin.ai.app / Contact: exevoice.app@gmail.com
We will provide our address and the name of the operator without delay on request. Please also see our disclosure under the Act on Specified Commercial Transactions.
Article 11 (Language)
The Japanese text of this Policy is the authoritative version. The English version is a translation provided for reference; if there is any discrepancy between the Japanese and English versions, the Japanese version prevails.