https://devzone.nordicsemi.com/f/nordic-q-a/3916/how-to-debug-ancsHi, I&#39;m done with the hardware interface of my current project. Right now I have a service running with a custom UUID, by writting this characterisitics you have access to the hardware on the device. I am not an apple developer and got told to implementen-USTelligent Community 13Thu, 25 Sep 2014 14:17:37 GMThttps://devzone.nordicsemi.com/thread/14100?ContentTypeID=1Thu, 25 Sep 2014 14:17:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e343135c-dfc5-49fa-9d35-68464a9ad062Asbj&#248;rn<p>There&#39;s no guide specific on how to build custom services into the ANCS project, but there&#39;s a app note on how to create your <a href="https://www.nordicsemi.com/eng/nordic/download_resource/24020/5/21228070">own custom service that could prove helpful.</a></p> <p><a href="https://devzone.nordicsemi.com/question/6100/ancs-with-nus-on-nrf51822/">Alternative I would also recommend you to have a look at this case and code.</a></p> <p>Regarding debugging your app on iOS an often used app is LigthBlue, but you might also find it useful to try the <a href="https://www.nordicsemi.com/eng/nordic/download_resource/26386/10/78985006">nRFSniffer that runs on an nRF51822-EK</a></p><div style="clear:both;"></div>