Simple SMS Messenger is an application that allows you to send both SMS and MMS and also manages group messaging and number blocking (from Android 7.0 Nougat).
The messaging application has a simple and practical interface in Material Design with a predefined dark theme, however you can also choose the light, dark red, black and white themes, or create your own by choosing the primary color and the text colors, background, app icon and navigation bar.
In the settings page you can choose the theme and customize the interface colors, manage the blocked numbers and change the date and time format.
The Simple Mobile Tools messaging app is completely open source and does not provide monitoring or analysis of any kind or advertising, moreover the Internet connection is used only for sending MMS.
Simple SMS Messenger is available for Android for free with the option to buy a thank you of € 0.69 and asks for permissions to access contacts and SMS.
Below you will find the badge to reach the application page in Play Store from Google. Android 5.0 or later is sufficient for installation.