FAQ - Frequently Asked Questions

How to apply for Rarity ranking?

Please fill out this form. Form submission does not guarantee listing.

How to apply for Drops listing?

Send a DM from your official project profile to our Twitter profile.

Can I advertise my project?

No. All listings are free of charge, there are no banners or ads. You cannot buy special treatment.

Can I send you donations or gifts?

Thanks, but no thanks. We appreciate that you thought of this though.

How do you calculate Rarity?

The base formula is simple: we sum points for all the traits with points for attribute count. Points are awarded by the formula: 1 / rarity %. In trait normalized version points are awarded by the formula: 1 / (count of occurrences for the attribute / count of most popular attribute in a trait). On top of the base formula we are adding some weights (awarding extra points or giving penalty) for certain attributes if that's requested by the NFT authors. We also have some experimental boosts, such as extra points for matching sets.

What is Trait normalization?

The simplest explanation would be the following: Let's imagine we have a Trait A with 3 options with the distribution of 50, 40, 10 and a Trait B with the following distribution: 10, 10, 10, 10, 10, 10, 10, 10, 20. During trait normalization, 10% in A gets a higher score than 10% in B because it's more impressive to get 10 in A than to get 10 in B. In B almost everyone got 10. This example is a bit exaggerated, but it illustrates the point.

What is Statistical rarity?

Statistical rarity is one of methods for calculating the rarity of an NFT. To get the total statistical rarity first we find out how unique is each trait (it's percentage). Then we multiply rarity for all traits. Attribute count gets ignored. The smaller is the final percentage, the rarer is considered the item. Even though this method is used in several community spreadsheets to calculate rarity, it's not perfect. Just like any other method of calculating rarity.

Which is the best rarity formula?

We do not have the clear answer. That's why we are not enforcing one specific way to calculate rarity. NFT collections differ one from another. We can't enforce the same constraints on all NFTs. For some base formula is the best fit, for some maybe Statistical rarity, but for some it could be Trait normalized base formula. In some other situations the teams vision with weights (penalties and boosts, matching sets etc.) makes the most sense.

Your ranking is wrong!?

That's a bit harsh. All rankings are biased in one way or another. We represent just one way of measuring rarity. There are many other ways to do the same thing. It's up to the community of each project to decide which type of ranking they like the best. One more thing to keep in mind - rarity does not always represent desirability, esthetics etc.

Can the NFT project influence the ranking?

Sure. We are always happy to accommodate any team's vision. In fact many of our rankings are tuned in close cooperation with NFT projects (even though at this time warning messages might say otherwise).

Will I make money if I will buy items based on your rarity?

Most likely not. You should not make your purchase decisions solely on ranking - no matter if it is our ranking or one created by someone else.

I found a bug. How to report it?

Send a message in our Discord or send a DM to our Twitter profile.

Do you have an API?

Not yet. But we have started to work on it.

When new design and dark theme?

Hopefully soon. A small preview can be seen here.

Who created HowRare.is?

HowRare.is was founded by SOLBigBrain.