How many cards can I compare at once?

Two to four. With one card there is nothing to compare, and past four the columns stop fitting on a phone.

Does the comparison include my own collection?

No. It reads the card database only. Whether you own a card is answered by the Collection Tracker and Collection Variants.

What is the difference between a card and a print?

A card is the playable Tetramon. A print is the set, border and finish it happens to have been pulled as. All prints of one Tetramon count as the same card in a deck.

Comparison tool

Compare Tetramon

Pick two to four cards and read their numbers, their play effect and where each one sits in an evolution line. Your selection stays in the URL, so a comparison can be reopened or sent to someone else.

Which card should I use?

Your selection

2 of 4 selected

Add a card

Partial names match. Element, rarity, effect and evolution stage are all read from the card database, not typed in by hand.

Comparing 2 cards

Element	Nanomite	Decimite
HP	110	117
STR	25	26
MAG	25	26
VIT	30	32
SPI	3	3
SPD	8	8
Element	Earth	Earth
Rarity	Common	Rare
Evolution stage	First stage	Middle stage
Play effect	Add 5 Tamer Shield that blocks damage from your opponent's attack.	Add 15 Tamer Shield that blocks damage from your opponent's attack.
Evolution chain	Evolves into: Decimite	Evolves from: NanomiteEvolves into: Meganite
Collection slots	36	36

What this table shows

Both columns read the same field from the same card database. A difference you see here is a real difference between the two cards, not a summary written for the page.

What it does not do

It does not rank the cards or tell you which one to play. Whether a card fits depends on the other cards in the deck, which this page cannot see.
It does not compare prints. Set, border and finish are tracked in Collection Variants, and every print of a Tetramon is the same playable card.
It does not count copies. Deck rules cap how many copies of one card a deck may hold, and the Deck Checker tests a list against them.

Card database →
Filter every playable Tetramon by element, rarity, effect and stats.
Card effects →
Read what each play effect does and which cards carry it.
Deck Builder →
Build a list from the cards you compared here.
Collection Variants →
Track which print of a card you actually own.

Questions

How many cards can I compare at once?: Two to four. With one card there is nothing to compare, and past four the columns stop fitting on a phone.
Does the comparison include my own collection?: No. It reads the card database only. Whether you own a card is answered by the Collection Tracker and Collection Variants.
What is the difference between a card and a print?: A card is the playable Tetramon. A print is the set, border and finish it happens to have been pulled as. All prints of one Tetramon count as the same card in a deck.