If you login daily you get each month for free roughly 600 premium orb fragments, 130 000 gold, 500 power cores, 30 L4 + 10 L3 + 2 L2 training modules and 50 character shards. These numbers vary a little from month to month, depending on the number of days available, and the character always changes. If you miss one or more days, you will lose the last and most important rewards (250 power cores, 100 000 gold, 15 shards). So at least login each day!
Further we have a list of the available characters for the monthly login rewards, since the official launch on March 28, 2018:
|April 2018||Spider Man|
|June 2018||Luke Cage|
|July 2018||Korath the Pursuer|
|August 2018||Winter Soldier|
Since August 2018 the rewards have more or less changed, to the worse of course, so we will also be tallying them further. In September though things improved back, and seem to hold so far.
August 2018: 40 character shards, 30 L3 + 45 L2 + 15 L1 ability mats, 12 basic + 5 advanced catalysts, 2000 gold orb and 2000 training orb fragments (= 1 orb if you get all). No more power cores or premium orbs...
Later added weekly login rewards, for a total of 2000 premium orb shards (equaling to a premium orb, so 4 a month): 25/50/75/100/250/500/1000
September 2018: 40 character shards, 35 L3 + 45 L2 + 15 L1 ability mats, 12 basic + 9 advanced catalysts, 1400 gold orb fragments, 725 power cores.
October 2018: 40 character shards, 35 L3 + 45 L2 + 15 L1 ability mats, 10 basic + 9 advanced catalysts, 2000 gold orb fragments, 725 power cores.
November 2018: 40 character shards, 35 L3 + 45 L2 + 15 L1 ability mats, 12 basic + 9 advanced catalysts, 1400 gold orb fragments, 725 power cores.