I have been using this app for a while and like it but have run into a problem. What formula are the ibu's calculated with? If it is rager i think they calculate about 70% what they should be. After brewing an ipa and porter that were formulated with this app they were too bitter.
To check i took the recipe for can you brew it dechutes obsidian stout and brewr is calculating 52.9 ibus. The recipe has them at 73.4.
Am i doing something wrong?
Thanks for any help