iFlexSMS is described as 'Convert your Android Mobile as Bulk SMS Sender. Send SMS Using Multiple Android Devices, Dual SIM supported, Campaign Builder, Inbound SMS, Outbound SMS and more' and is an app in the social & communications category. There are 1 alternatives to iFlexSMS for Mac, Windows, Linux and Android. The best iFlexSMS alternative is Android SMS Gate, which is both free and Open Source.
Android SMS Gate. Allows you to manage SMS and Share links between browser and mobile device.
Automated(?) last update message unfortunately wrong. Looks like last merge into main codebase on Gitlab was 3 weeks ago; app still actively developed.
