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BLUF: If you have an Android get it here. If you have an iPhone get it here.
I recently rebuilt my WRD Calculator app using ionic, which allowed me to release it on Android and iPhone. The Android version, as it's always been, is free. The iPhone version, as recommended by several other redditors, is $1.99. This is only to partially recoup the $99 annual developer license that I had to pay to get it published, and is in no way connected to any compensation I feel I should receive as a developer. I figure I might get $35 back all told considering iPhone's only make up ~20% of the smart phone market share and I've got about 100 Android downloads so far, with Android controlling 79% of the market share. (The math works out that 20% roughly translates to 25 people, and 25 downloads x $1.40 a download (Apple keeps about 1/3 of each sale) ~ $35.)
To help justify the purchase a little bit more for the iPhone users I've added some graphics and UI styling, so its a little more than the barebones application that it was originally. I'm also open to suggestions on how to add additional functionality (I'd like to add a database lookup of queried units from the Hidden Stats spreadsheet eventually). In any case, I promise those that purchase the iPhone app that all this additional functionality will be added to this app alone, instead of being released as a separate app.
I actually built a calculator that gives you the damage, just input the ke/he and armor value. BLUF: If you have an Android get it here. If you have an iPhone get it here.