Privacy Policy

Summary

• No account, sign-in, name, email or phone number is needed to use Mailtone.
• When you ask for an email, the draft, incoming email or brief you entered, your notes, and the recipient type, tone, length and language you chose are sent over HTTPS to our server, which passes them to OpenAI. Our server does not save them. The app asks for your agreement before the first request.
• Your email history and preferences are stored only on your phone.
• Mailtone has no advertising, no analytics, no crash-reporting service and no cross-app tracking. It does not read the advertising ID.
• The optional Mailtone Pro subscription is sold through Google Play or the App Store and validated by RevenueCat, which processes an anonymous app user ID and your purchase history.
• We do not sell personal information and do not share it for advertising.

Generating an email

When you write, rewrite, reply or refine, the app sends our server the text you entered (your draft, the email you are replying to, or your brief and notes), the options you picked (recipient type, intent, tone, length and language), and a random ID created on your phone that is used only to limit how many requests can be made. The server runs on our hosting provider, Railway, and forwards the request to OpenAI’s API, which writes the email and streams it back. Our server does not save your text or the result and does not log their content. OpenAI processes the request as our service provider under its API terms. OpenAI states that data sent to its API is not used to train its models by default and may be kept for up to 30 days to detect abuse.

Emails you paste in may contain other people’s names and details. Please paste only what you need and only where you have the right to do so.

Sending and sharing

When you tap to send, Mailtone opens your phone’s mail app with the subject and text filled in; the email is sent by your mail app under your own account, and Mailtone never sees your mailbox. Copying and sharing go through your clipboard or your phone’s share sheet.

Information stored on your device

Mailtone keeps the following only in the app’s private storage on your phone:

• Your generated emails and history, the draft you are working on, and your onboarding preferences.
• Whether you agreed to the AI processing, your appearance and language settings, a random install ID used for request limits, daily usage counts for free limits, and a record of rating requests.

Mailtone does not upload this information to AppsOverflow LLC. If you have turned on Android’s own device backup, Android may include the app’s saved data in your personal backup to your Google account under Google’s terms; we cannot access that backup.

Mailtone Pro subscriptions (Google Play, the App Store and RevenueCat)

Mailtone Pro is an optional subscription sold through Google Play Billing on Android and through the Apple App Store on iPhone. Google or Apple handles the payment; we never receive your card or payment details. Purchases are validated, restored and kept up to date by RevenueCat, Inc., our subscription service provider.

When the app starts, it contacts RevenueCat over HTTPS to check whether you have Pro and to load the prices the store shows, even if you never buy anything. For this, RevenueCat processes an anonymous app user ID created by the app (not linked to your name or email), your purchase history for Mailtone (products, store purchase tokens and order details, purchase and renewal dates, subscription status), and technical information needed to answer the request, such as app version, operating-system version, store country, currency and language, and the IP address your connection uses. Mailtone does not send RevenueCat your emails, drafts or notes, your advertising ID or any contact details.

We use this information only to provide and restore your subscription, prevent fraud and see how subscriptions perform. RevenueCat processes it on our behalf as a service provider. You can manage or cancel your subscription in the Google Play Store app (Payments & subscriptions) or in your Apple ID settings (Subscriptions); uninstalling Mailtone does not cancel it.

Rating requests and support

Mailtone may occasionally ask you to rate it using the store’s own review screen (Google Play on Android, the App Store on iPhone). The store handles that screen; the app does not learn whether or how you rated it. If you email us, we receive your email address and whatever you choose to include, and we use it only to reply and resolve your request.

Permissions

Mailtone uses Internet and network-state access to reach our server, RevenueCat and the store, vibration for haptic feedback, and Google Play’s billing permission for Mailtone Pro. It does not ask for the camera, location, microphone, contacts, or access to your photos and files, and it cannot read your mailbox.

Sharing

We do not sell, rent or trade personal information, and we do not share it for advertising. Information is shared only with our hosting provider Railway and OpenAI (only the text and options for an email you request), Google or Apple (store purchases and review screens) and RevenueCat to provide the functions described above, with anyone you choose to share your own files or results with, or when required by law.

Retention and deletion

History, drafts and settings stay on your phone until you delete them in the app, clear Mailtone’s storage in your phone settings, or uninstall the app. Our server keeps no copy; OpenAI may keep request data for up to 30 days for abuse monitoring, as described above. Google, Apple and RevenueCat keep purchase records for as long as needed to provide and restore purchases and to meet accounting, tax and legal obligations. To ask us to delete RevenueCat records linked to your Mailtone purchases, email support@appsoverflow.com with your Google Play order number (GPA.…) or Apple receipt; we will tell you what can be removed and what must be retained by law. There is no Mailtone account to close.

Children

Mailtone is a general-audience app and is not directed to children under 13. It does not knowingly collect personal information from children. If you believe a child has provided personal information through Mailtone’s purchase services, contact us and we will delete it where we can.

Your rights

Depending on where you live (for example under the GDPR in the EU/UK or the CCPA in California), you may have rights to access, correct, delete or receive a copy of personal information, and to object to or restrict its processing. Because Mailtone stores your content only on your device, most of these rights can be exercised directly in the app or by uninstalling it. For anything held by RevenueCat or OpenAI on our behalf, email support@appsoverflow.com. You may also complain to your local data protection authority.

Security and international processing

Network traffic from Mailtone to RevenueCat, our server and OpenAI uses HTTPS. No method of storage or transmission is completely secure, so please keep your phone protected with a screen lock. Google, Apple, RevenueCat, Railway and OpenAI may process information in the United States and other countries under their own safeguards and policies.

Changes to this policy

We may update this policy if Mailtone’s features or data practices change. The “Last updated” date above shows the current version.