Im using M2G Android Miner to mine Monero. But you need a lot of cellphones to achieve pc-like results.
Eg my S6 gets about 15 h/s, but my S9 gets 40+ h/s.
Its pretty bad that an S9 can get 40H/s when an RX 470 gpu gets like 1000H/s. The RX 470 can be had for like $50 on eBay and an S9 is still a pretty expensive phone. It also has a battery inside that will most likely explode due to the sheer constant heat of the mining. And right now its not profitable to mine with the RX 470, so mining with an S9 is even worse.
If you really want some money and got some spare phones, just put them on Craigslist and sell them for cash and use that cash to buy crypto instead. Not really worth the headache and like the above poster have said, its a scam fad and the other phone miners are fake mining and you won't actually make any profit.
You are absolutely right. I just mentioned these numbers to show how tiny they are. Phones just cant compete with pc cpus and gpus. But thats just because of the overhead costs, the hashrate per wattage ratio is pretty much equal compared to my 1080s on Monero.
Nevertheless I wouldnt call it scam because it is what it is. Everybody can run the numbers and compare it to see it's not worth it out of a financial point of view. But it still serves the general idea of decentralization and for some it's just fun to see and try if something works even if it makes no sense.
Btw my S6's temperatures arent that high. Just about 40-50° Celsius. They get way hotter playing mobile games for example. My guess is phone gpu causing most of the heat which isnt used for mining. But Im no expert, correct me if I'm wrong.