RARITY SCORE is approximately calculated based on rarity of cattributes & gen & cooldown.
All cattributes values are multiplied together and normalized*
* "normalization" is approximate - so you can get values slightly over 100% from time to time - that's ok
The tool doesn't account for genes rarity (randomness) yet.
For example, if you breed a bird with a cat - you can get a simple common cat. But as it's father was a bird - it can give you a bird or rare traits in the next generations!
0% is VERY RARE And Expensive. ‐ 100% is Very Common and Cheap.