Update:
Mobile miner was launched on 5 March 2018.
I see recently a lot of people spreading the news about mining Electroneum with your phone, and pretty much saying it will increase in value because people can mine these coins with just a phone and not like other coins that were necessary at least a powerful laptop or a supercomputer or in Bitcoin case which requires special ASIC mining hardware.
The app is available on Google play by name
Electroneum and the good thing is that you will not lose a lot of battery or damage your phone while mining this coin, it's because this is not real mining it's simulation of mining so your phone will not heat.
Have you started mining Electroneum? I will test it out with my iPhone when they release the app.