Sending alerts from a fixed IP to a mobile phone

[jollytall]

I have an application running on a server with fixed IP. Every now and then I want to send alerts to my mobile phone. Options I considered:
- Send e-mail: This one works well, but not alerting enough (or all my spam e-mails would alert me at night).
- Use Skype to call. As far as I could find there is no Skype API available, especially not one with no GUI.
- Use some central services to send SMS or even to voice call to a public telephone number. I found many services like that with subscription, cost, and a whole large infrastructure.
- I would be happy with a very small mobile App that logs in to my server directly and waits for an Alert. Theoretically I could write it, but would prefer a ready app. Is there any simple mobile app that does not do anything else than just logs in to a server and makes noise when it gets an alert? And of course one, where the server side is either easy to write (some socket handling) or where there is a Pascal API.

Any other, better idea?

[MarkMLl]

Use a GSM modem with a minimal-cost account to a telecoms provider. I've used Siemens modules for this in the past, and sending an SMS was basically a Hayes-style command.

MarkMLl

[delphius]

Any other, better idea?

https://github.com/Al-Muhandis/fp-telegram