Privacy Policy

Blue Post Cross ("the App") / Established: August 12, 2026

The App forwards notifications between an Android phone and an iPhone that you own. Toshinori Matsui ("we") sets out below how information is handled in the App.

There is no server operated by us behind the App. Your information, including the content of your notifications, flows only between your two phones and is stored on those phones. We never receive that content, and we never look at it.

1. Information we collect

None. The App does none of the following.

  • Ask you to create an account, or to enter your name, email address, phone number, or anything similar
  • Send the content of your notifications, your contacts, your photos, your call history, or anything similar to us or to a third party
  • Include analytics that measure how you use it, or any mechanism that serves or measures advertising
  • Collect identifiers of your phone in order to track you

The App does not connect to the internet. The only communication it needs in order to work is Bluetooth communication between the two phones that have been registered with each other.

2. Information handled on the phones

The App handles the following information in order to provide its features. None of it is sent to us.

Information handled Purpose Where it is stored
The content of notifications
(app name, title, body, time of arrival)
To forward it to the other phone and show it there, and to let you read it again afterwards. The app's private storage on each phone
The name and identifier of the app a notification came from To let you turn forwarding on and off for each app. The app's private storage on the Android phone
Battery level and whether the phone is charging To show the other phone's level, and to tell you when it is running low. The app's private storage on each phone
Location (approximate) To show the last place you were connected on a map. Permission is optional. Only the app's private storage on the phone that measured it
Details of the registered phone
(its name and a value used to identify it)
To make sure it connects only to the single phone you registered. The app's private storage on each phone
Your settings
(direction of forwarding, per-app switches, and so on)
To keep the settings you chose. The app's private storage on the Android phone

3. Communication between the two phones

  • Communication happens directly over Bluetooth. It does not pass through the internet or the cloud.
  • The only phone it communicates with is the single one registered by scanning the QR code.
  • Everything exchanged, including the content of notifications, is sent only in an encrypted state, once the two phones have been registered with each other. Notifications are not sent over an unencrypted connection.
  • What is exchanged is the content of notifications, battery level, settings, and connection state. Location is not exchanged between the phones.

4. Keeping and deleting the notification log

The App has a list (the notification log) that lets you read the forwarded notifications you received, newest first.

  • What is recorded is only the forwarded notifications received from the other phone. Notifications that arrived on that phone in the first place are not recorded.
  • Notifications from an app you set not to forward are not recorded either.
  • Records never disappear on their own with age or number. They disappear only when you delete them. You can delete them one at a time, or all of the ones currently listed at once.
  • Records are kept in a file in the app's private storage, and they are excluded from cloud backup and from the transfer of data when you move to a new phone. They do not remain anywhere outside the phone.
  • Uninstalling the App deletes the records from the phone.

5. Location

Location is used for one thing only: showing the last place you were connected.

  • Permission is optional. Notification forwarding works perfectly well without it; you simply see a note in place of the map.
  • Each phone shows only its own location, measured by itself, on its own screen. It does not know where the other phone is.
  • A measured location is never sent to the other phone, to us, or to a third party.
  • Location is measured only when the link is established, when you open the screen, when there is communication, and when the link drops. It is not recorded continuously.
  • The location used is approximate, to about 100 m.
  • You can withdraw the permission at any time from your phone's settings.

6. Permissions the App asks for, and why

Android

Permission Reason
Notification access Needed in order to read the notifications that arrive on this phone and forward them to the iPhone.
Showing notifications Needed in order to show the notifications received from the iPhone on this phone.
Bluetooth (scan, connect, and advertise) Needed in order to connect to the iPhone. Scanning is not used for the purpose of determining the location of the phone.
Exclusion from battery optimization Needed in order to keep the link alive. Without it, the connection is cut after a while and notifications stop arriving.
Location (optional) Used only to show the last place you were connected. The App works without this permission.

iPhone

Permission Reason
Notifications Needed in order to show the notifications received from the Android phone on this phone.
Bluetooth Needed in order to connect to the Android phone.
Camera Used only to scan the QR code during registration. Images are never saved or sent.
Location (Always) Used so that the connection to the Android phone can be resumed even when the app has been terminated, and to show the last place you were connected. Location is never sent anywhere outside the phone.

You also need to turn on "Share System Notifications" for the registered phone under "Settings" → "Bluetooth" on the iPhone. This is the setting that lets notifications arriving on the iPhone be forwarded to the Android phone; if it is off, only that direction stops working.

7. Sharing with third parties

Because we do not collect your information, there is nothing for us to share with a third party. The App contains no mechanism for serving advertising, for analysing use, or for connecting to an external service.

Even where disclosure is requested under the law, we hold none of the content of your notifications, so there is no information we can provide.

8. Records for troubleshooting

The App may write a record of its own behaviour on the phone. That record does not include the title or body of notifications, or location coordinates. Nor do we collect it automatically.

When you contact us about a problem, we may ask you for the contents of that record. Even then, whether to send it is yours to decide.

9. Keeping information safe

  • Communication between the phones is encrypted, between phones registered with each other.
  • Stored information is placed in the app's private storage, which other apps cannot read.
  • Files containing the content of notifications are excluded from cloud backup and from the transfer of data between phones.

The safety of the phones themselves (setting a screen lock, for example) is left to you. A forwarded notification may be shown on the lock screen of the phone that receives it.

10. Use by children

The App is for connecting two phones that you yourself own. Because we do not collect information, we do not collect information about age either.

11. Changes to this policy

We may change this policy as features are added to the App or as the law changes. When we do, we will post it on this page with the date of revision. If the change is significant, we will also tell you inside the App.

12. Contact

For enquiries about the App or about this policy, please contact us here.