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WhatsOpen

Open WhatsApp chats with any number, no contact needed.
New in version 1.1.3
- Fix signing config to make F-Droid CI build work alongside reproducible builds
WhatsOpen lets you start a WhatsApp conversation with any phone number — even numbers you haven't saved as contacts.

Features:

* Enter a phone number with country code and open WhatsApp directly
* Auto-detect phone numbers from your clipboard
* Browse recent call log entries and open WhatsApp for any of them
* Filter call log by call type and WhatsApp contact status
* Material 3 design with light and dark themes

WhatsOpen requires no network access, contains no analytics, and does not track you. All processing happens on-device.

Permissions:

* Read call log — to show recent calls
* Read contacts — to display contact names alongside numbers
  • app screenshot
  • app screenshot
  • app screenshot

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 1.1.3 (5) suggested Added on May 30, 2026

    This version requires Android 7.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • read call log
      This app can read your call history.
    • read your contacts
      Allows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • com.harshalbhatia.whatsopen.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 1.8 MiB PGP Signature | Build Log

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