Last updated: 21 August 2026
This page covers both the iOS and the Android app. Handling specific to Android — permissions, transmission, backup and the Google Play Data safety declaration — is set out in “The Android app” below.
Revot Co., Ltd. ("we", "us" or "our") respects the privacy of everyone who uses our iOS application "Moyahodoki" (English name: NightVent; the "App"). This Privacy Policy explains what information the App handles, where that information is sent, and how long it is retained.
The App requires no account registration and never asks you for your name, email address, phone number, date of birth or location. Your conversation records are, as a rule, stored only on your own device.
However, in order to generate the AI's reply, the text you write and the AI's responses are transmitted through our relay server to an AI provider. This is how the App fundamentally works; without this transmission the App cannot function. Please read Section 3 carefully.
The App does not collect any of the following.
The App displays no advertising of any kind.
The following is stored only within the App's own area on your device. It is not held on our servers, and we have no means of viewing or retrieving it.
| Stored item | Contents | How it is removed |
|---|---|---|
| Conversation records | The text you type, the AI's responses, the listener you selected (Yoruko, Akane or Sou), the topic (love, life, or "just listen"), timestamps, and a randomly generated conversation ID | You can delete individual conversations from the "Records" screen in the App. Deleting the App removes all of them |
| Free-tier counter | Today's date and the number of messages remaining today | Removed when the App is deleted |
| Anonymous device identifier | A random string (UUID) generated by the App on first launch. It is not the IDFA and is not an identifier issued by Apple or anyone else. It is not shared with other apps or companies and contains nothing that links it to you personally | Removed when the App is deleted (a new value is generated on reinstall) |
| Purchase status cache | Whether Premium is active and the next renewal date. It contains no payment details such as card numbers | Removed when the App is deleted |
To generate the AI's reply, transmission occurs in two stages. All communication is encrypted with TLS.
The App transmits the following to a relay server operated by us (ai.revot.jp, hosted in Japan).
yoruko / akane / sou) and of the topic (love / life / vent)This relay server does not save the contents of your conversations to any database. The only thing the server holds is a temporary counter of messages per day (a number kept against the anonymous device identifier). That counter exists only in the server's memory and is cleared when the date changes and whenever the server restarts. Conversation text is never written to the server's storage, and no employee of ours reads your conversations.
The relay server sends the conversation text, together with a fixed instruction prompt written by us (which defines the AI's persona and the things it must not do), to the large language model API operated by an AI provider, and returns the generated response to the App.
| Item | Details |
|---|---|
| Recipient | DeepInfra, Inc. (United States of America) |
| What is sent | The conversation text and our fixed instruction prompt |
| What is not sent | Your name, contact details, location, device identifier and subscription receipt. These stop at our relay server and are never passed to the AI provider |
| Use for training | The provider states in its privacy policy that it will not store, sell, or use the inputs to and outputs from its API for training without the customer's explicit consent |
| Retention by the provider | As stated above, the provider does not store the inputs or outputs. Account information is retained under the provider's own terms |
If we change the AI provider in the future for reasons of cost or quality, we will update this page before making that change and will state the provider's name and the country in which it is located.
As set out above, the text of your conversations is transmitted to an AI provider located in the United States of America. If you choose to write information identifying an individual into a conversation, that information will be transferred at the same time.
By using the App to send a message, you are treated as having consented to the transfer described above. If you do not consent, please do not use the App.
As explained above, what you write is transmitted to an external AI provider. Please do not enter names (your own or those of third parties you mention), addresses, phone numbers, employers, account numbers, passwords or similar information. None of it is needed in order to talk about how you feel.
The anonymous device identifier described in Section 2 is used only for the following.
This identifier is not used for advertising, behavioural targeting or user tracking, and is not provided to third parties. There is no mechanism by which it is shared with other companies' apps or websites.
All payments for Premium (an auto-renewing subscription) are processed by Apple's App Store.
If you have enabled sharing of analytics with app developers in your device settings, Apple may provide us, through App Store Connect, with usage statistics and crash reports that Apple has collected, anonymised and aggregated. We cannot identify any individual from this information, and it never contains the contents of conversations. You can change this setting at any time under Settings > Privacy & Security > Analytics & Improvements on your device.
Where the App mechanically detects words relating to self-harm, abuse or violence, it does not stop the response or cut off the conversation. Instead, it displays information about public support services alongside the reply.
If there is an immediate risk to life, please contact the public services listed in the App, or dial 110 (police) or 119 (fire and ambulance) in Japan, or your local emergency number.
We do not disclose the information we handle to third parties except in the following cases.
We do not sell or rent the information we handle, and we do not provide it to advertising companies or data brokers.
| Where | What is retained | For how long |
|---|---|---|
| Your device | Conversation records, free-tier counter, anonymous device identifier, purchase status cache | Until you delete it (deleting the App removes everything) |
| Our relay server | The daily message counter only | Until the date changes or the server restarts (conversation text is never stored) |
| The AI provider | Conversation text and responses | For the period set by that provider for abuse monitoring (generally up to 30 days), then deleted |
| Support enquiries | Your email address and the contents of your enquiry | Deleted a reasonable period after your enquiry has been resolved |
The data associated with the App is under your own control.
If you wish to request disclosure, correction, suspension of use or deletion of data relating to you, please contact us using the details in Section 15. Because we do not hold information that identifies you, we may be unable to verify that a request comes from you and therefore unable to act on it; in that case we will tell you so.
Because the App handles adult subject matter relating to relationships and personal life, it is intended for users aged 17 and over and is rated 17+ on the App Store. We do not knowingly collect personal information from children under 13. If you are a parent or guardian and become aware that your child is using the App, please contact us.
Because we do not hold information that identifies you (such as a name or email address), we may hold no data that can be linked to you for the purposes of requests for access, rectification or erasure under the EU General Data Protection Regulation (GDPR), the UK GDPR, the California Consumer Privacy Act (CCPA/CPRA), Japan's Act on the Protection of Personal Information or similar laws. We do not sell your information, and we do not "share" it as that term is used in the CCPA. If you have any questions, please contact us.
We may amend this Policy in response to changes in law, changes to the App's functionality, or a change of AI provider. Where a change is significant, we will publish it on this page together with the date of the update and will also notify users by appropriate means such as an in-app notice.
| Company | Revot Co., Ltd. (株式会社revot) |
|---|---|
| Representative | Seita Sukisaki, Representative Director |
| Address | 3-16 Ichigaya Tamachi, Shinjuku-ku, Tokyo 162-0843, Japan |
| Corporate number | 3050001044724 |
| Privacy enquiries | sukisaki@revot.jp |
| In-app reports and general support | contact@revot.jp |
If you contact us, we receive your email address and the contents of your message. We use them solely to respond to your enquiry and delete them a reasonable period after it has been resolved. We do not provide them to third parties except as required by law.
Privacy Policy for Revot Co., Ltd. as a whole
Last updated: 4 September 2026 — Applies to the Android app "NightVent" (package jp.revot.yorigoto)
This part applies to the Android build distributed on Google Play. Where it differs from the text above, which describes the iOS app, this part governs the Android app.
The following exist only in the iOS app and are not implemented on Android, so no related information is obtained: Apple's App Tracking Transparency prompt; purchases through StoreKit.
To produce a reply, the app sends the text of your conversation to our relay at https://ai.revot.jp when you send a message, and the relay forwards it to an external AI provider, DeepInfra, Inc. (United States). There is no account and we never ask for your name or contact details. What is sent is:
This transmission happens only after you have agreed to it. Before the first send, the app states what is sent and where it goes, names the provider it is forwarded to, and asks for your consent. Without consent nothing leaves the device. You can withdraw consent at any time in Settings, after which the app sends nothing until you agree again. The conversation itself is stored on the device and can be deleted in the app or by deleting the app.
The Android package contains only these permissions: BILLING, INTERNET, ACCESS_NETWORK_STATE, DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION. There is no advertising-ID permission and no contacts, SMS, call-log, calendar or external-storage permission. The app shows no advertisements and contains no advertising, analytics or crash-reporting SDK.
The app declares android:allowBackup="false", so its data is excluded from Android Auto Backup and is never copied into your Google account. Uninstalling deletes it.
For Google Play Data safety we declare that "App activity — other user-generated content" is collected and shared, transmitted over HTTPS, and only with your consent.
Questions: contact@revot.jp.