We require a web based bulk SMS application that can take information from a excel spread sheet and generate a txt message to remind our customers of their appointments.
We currently have a application using Python/Flask and Redis. Running on a Linux box with a USB modem.
The current system source files are here
This system works fine but it doesn't send the appointment time only a generic txt that advises the customer has an appointment the next day. It also requires my staff to save the excel spreadsheet as a .csv then copy and paste the data into the application. I would like to simplify this procedure. The person who made the current Sendr app, was going to make our new program but he is very busy and we require this ASAP.
We will require the contractor to be available to hire again in the future for upgrades and faults.
Please advise an estimated cost with your application.