EnvayaSMS should work on any phone with Android 1.6 (Donut) or higher. As of 9/23/2011, over 579 different phone models are compatible with EnvayaSMS.
EnvayaSMS has been tested and is known to work with the following phones:
No. When using EnvayaSMS, you connect it to your own web server. The EnvayaSMS Android app does not connect to envaya.org or any third-party servers. In particular, you do not need to register for envaya.org.
For information about configuring a web server to connect to EnvayaSMS, see the API Reference page.
We originally developed EnvayaSMS to enable civil society organizations in East Africa to interact with envaya.org via SMS and MMS, such as by posting news updates and photos to their website.
We realized that EnvayaSMS would be useful for any web service that needs to send and receive SMS/MMS, and decided to make EnvayaSMS available for anyone building their own applications.
Development of EnvayaSMS is currently led by the envaya.org team, but anyone is welcome to contribute to improve it.
The source code for EnvayaSMS was originally based on KalSMS, an open-source project started by Nir Yariv in 2010 that introduced the idea of a simple SMS gateway implemented entirely as an Android app. EnvayaSMS is a complete rewrite that shares little code with KalSMS.
EnvayaSMS builds upon the idea of KalSMS by adding many new features that would be necessary for anyone deploying an SMS gateway in the field, such as sending more than 100 messages per hour, authenticating the phone to the server, and retrying forwarding messages after transient errors. For a complete list of changes, see the History page.
EnvayaSMS's server API is incompatible with that of KalSMS. Anyone switching from KalSMS to EnvayaSMS must update their server to use the new API described on the API Reference page.
As of 2011, KalSMS is no longer actively developed, and new development will occur on the EnvayaSMS project.