Unofficial Arknights calculator and pull tracker

* Check your chances before you pull using the calculator
Enter the currency you currently have and optionally a future date, to see your percentage of getting a focus operator.

* Plan out your pulls by selecting a date to check your orundum gains

* Keep track of your pulls to see how lucky you actually are over time in a graph!
After each pull session, enter the currency used and SSRs (6 star) SRs (5 stars) pulled. Over time you will see the actual SSR and SR rate you have accumulated without bias in both numeral and graphical form.

* Tap the help icon if unsure about the function of a page

I hope this utility can be useful to some of you trying to get the most out of your in-game currency (and wallet)!