A few week ago I have been writing about CryptoTab browser with mining as a way of passive income. Now I want to inform you about another miner. It´s name is Cudo miner. Contrary to CryptoTab Cudo isn´t an internet browser but specially mining software. You can deploy that on Windows, MacOS or Ubuntu (debian like linux) operating systems or you can use it on rig machine as CudoOS.
The second difference between Cudo and CryptoTab is in its using hardware sources. CryptoTab is chiefly using computers CPUs for mining whereas Cudo is using more GPUs than CPUs. It make sense because the GPUs are mostly efficient to cryptomining than CPUs but on an older PC with integrated graphic card Cudo gives poor mining power. I have tested Cudo on 'clerical' pc for a week and I prove that while Cudo mined 3 satoshi per hour, CryptoTab mined 11 satoshi in the same time.
Despite a different mining power on my PCs given weak results for Cudo, I´m still thinking cudo isn´t bad choice. First, download, installation and mining is easy on Windows or linux platform, MacOS or CudoOS I haven´t tested. If you have at least medium powerfull nVidia or AMD graphic card Cudo can give interesting mining results: in this time (1BTC = 10000 USD, in my country hour electricity consumption cost 0.03 USD) the 30 mined satoshi per hour is enough to depress pc-working expenses to zero.
Before you can download Cudo miner you have to register on website by your email address or Google, Facebook or Microsoft account. It is necessary to create your own Cudo account, where you receive 5000 satoshi to get started. Miner has a built-in GPU overclocker to rise mining power yours device, but the main advantage is Auto coin switching function. Cudo Miner continuously scans the coin value and difficulty and automatic algorithm switching to mine the most profitable coin at any given time.

When you are working with your device Cudo sits almost dormant in the background and waiting. It will start with full mining power when the system is idle. Some user could be delighted in Cudo dedicated web console for monitoring and remote management.
I haven´t tried a withdrawal yet because a minimum transfer amount is 200 000 satoshi, I didn´t reach it but I´m close :-)

Yours sincerelly QW