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Response from developer
This iPhone client application requires the Mac version of "Bulk SMS Sender", which can be downloaded from the App Store.

Send SMS messages from your Mac using your iPhone. This app allows you to type messages on your computer and send them to single or multiple recipients via a Bluetooth connection. It requires a companion Mac application.
1.4.2
January 18, 2021
- iOS 14 compatibility
This iPhone client application requires the Mac version of "Bulk SMS Sender", which can be downloaded from the App Store.
No, Blue SMS client does not contain advertisements.
Blue SMS client requires Bluetooth 4.0, macOS 10.8 or later, and iOS 9 or later. Specific Mac and iPhone models supporting Bluetooth 4.0 are listed in the app description.
Yes, Blue SMS client allows sending messages to individual recipients or groups. You can also import groups directly from your Apple Contacts or from a CSV file.
No, Blue SMS client is designed for iOS devices and requires a Mac computer. It is not compatible with Android phones.
Sending SMS messages must be confirmed on the iPhone due to security reasons, which is a feature of the Apple developing environment. This confirmation is necessary for sending messages.
The app was last updated on January 18, 2021, indicating a less frequent update schedule. Its current version is 1.4.2.
Blue SMS client has a rating of 2.0 stars based on 1 review.
No, Blue SMS client only works with specific Mac computers and iPhones that support Bluetooth 4.0, as detailed in the app's requirements section.