Upgrading

Some pieces of gear are upgradeable. They have a small "Upgrade" button in the middle of their "card", which opens up the upgrade screen. You can also double tap the piece of gear in your inventory to open up the upgrade screen. The piece of gear will be shown in the middle of the upgrade screen, with 5 slots around it. You can drag other gear or upgrade gems into those slots. Above the slots, a number will appear, indicating how many "upgrade points" the item you're upgrading will get towards the next level from the items you put into the slots (better items give more points). If it's not enough to reach the next level, you'll have to add more items, or better items (or upgrade it several times). If it is enough, your piece of gear will level up, which increases the bonuses it gives. If it's more than enough, don't worry, the extra points won't go to waste, they'll still count towards the next level. The price of upgrading is listed below the slots. After you're done choosing which items to use for upgrading, tap the "Upgrade" button at the bottom to complete the upgrading process.

The price of upgrading your gear is currently 300 tokens per slot per level of gear: 300 x A x B,

where A is the amount of slots you used (1 to 5),

and B is the current (starting) level of the piece of gear you're upgrading (not the level it will be after upgrading!), increased by 1.

Example: lvl0 gear being upgraded with 4 items: 300 x 4 x (0+1) = 300 x 4 x 1 = 1200 tokens

Another example: lvl13 gear being upgraded with 2 items: 300 x 2 x (13+1) = 300 x 2 x 14 = 8400 tokens

History: The price of upgrading used to be 400 tokens per slot per level of gear. Then there was a discount for a few days when the price was 200 tokens per slot per level of gear. Then it got changed to the current price.

Note: The price is lower for the first few levels (of your character).