There's none because it's not feasible for a mobile processor to mine POW coins.
If you can find one that's being advertised as "miner", it's most likely a scam, faucet, a gimmick or both.
One example of those gimmick + faucet-like "mining app" was Electroneum app which acts as wallet with internal "fake" miner.
But now, they took away the 'ETN miner' feature.

If there's a legit one (sadly, I don't have any recommendations), it will take a lot of time to get a decent payout.

Hi CrimsonGT,

As of this moment, a 4.7TH/s S7 would net you about 10.4 EMC per day. The difficulty has risen significantly along with the price. This would be about $4.63 a day. If you have the money laying around you might as well jump on a new S9 when the price drops a little.

If your electricity is cheap you can certainly profit from mining. If you don't want to deal with the electric bill increase as you are mining and holding your EMC, I would suggest buying some from an exchange. Personally I enjoy mining and even when I want to purchase coins I usually end up purchasing extra hashing power and mining them instead. It doesn't matter to me if my profitability falls slightly in the red because I believe the coin is still significantly undervalued at this point.

If you want to get an S7 at a good price and quickly I'd recommend buying from Scott at holybitcoin.com. I've purchased from him before and had no issues.

If you want to learn more about Emercoin feel free to ask. There is a lot of development in progress and great projects on the horizon for EMC so you've placed your faith well. I'm always here to help!