How efficient is mining with an IPhone or a desktop computer? In this article, we report on a few measurements we have done ourselves and explain how you can find out for your own device.
Every type of device has a different composition of processor, memory, batteries etc. and thus generates a different amount of charity coins. When you turn on the miner, you will see the speed of your mining in Charity Cents / min. With a power metering device you can check how much power your computer uses, when it is idle most of the time, e.g. when writing an e-mail or surfing the internet. Then you can turn on the miner and check how much power it then uses, when you mine at 50%, 60%, ... 100% speed. From this you can then calculate the efficiency in units of x Charity Cents/min/W.
Interestingly, we have found, that the different browsers, have significantly different speed, on most devices we have reached the top speed with Mozilla Firefox, being usually much faster than Safari even on a Mac. This may of course also depend on the version you use, just try yourself!
IPhone SE : with Safari on an IPhone SE (after an update to iOS 11.2.6) we reach a top speed of 5 Charity Cents/min, when mining on 100% speed. Interestingly, before an update we were reaching up to 10 Charity Cents/min, not sure what happened in the update... When I am doing something else on the IPhone, it usually uses some 2.5W and on 100% mining around 6W. This means, that on average we get 1.4 charity cents/min/W.
Macbook Air: with Firefox on a Macbook Air we found a top speed of 13 charity cents / min, when mining on 100% speed. With a power usage of 15W when surfing the internet and 30W when mining on top speed this is an efficiency of 0.85 Charity Cents/min/W.
iMac : with Firefox on an iMac we found a top speed of 50 Charity Cents/min, when mining on 100% speed. With a power usage of 50W when surfing the internet and 110W when mining on top speed this is an efficiency of 0.83 charity cents/min/W.
Finally, to decide whether you are more efficient by directly donating money to the charities or doing charity mining you need to take into account how much you pay for your power per KWh. This strongly depends on the country you live in and the subscription price you pay for power. Additionally, you do of course need to take into account the value of Charity Coins in EUR, which varies quite a bit, due to the currency used for mining and the value of that currency, currently the value of 1000 charity coins is: