This App uses SMS provider "Twilio's" free account for getting the same. The app uses four credentials for each individual app (the number used for twilio registration, the number given to you by twilio, the AUTH TOKEN given by twilio and the AUTH SID). You can be sure these numbers are safe. The number of texts you can send from this app is well, 1 text per second.
And yes, you have to bear with a little (Sent from Twilio trial account message) with every text, that is a necessary evil for using their services.
I hope you will have fun using it. The source code for the project is available at. https://github.com/bijaykoirala/freetext
First please sign up for twilio's services at https://www.twilio.com/try-twilio and make sure you copy paste the four important numbers to fit in the app. (The four numbers are very IMPORTANT to set up correctly and the app will not work without those)
DISCLAIMER: Your twilio details are not stored anywhere except on your device.
** If the report says Error: Null and Status: queued, your message is sent