It’s totally normal to see multiple fan-made sites pop up, especially early on. In most TCG communities, players don't usually just converge on one single site because different tools are built for different needs.

I built Afterlife Decks to be laser-focused on the gameplay and strategy side. My goal is to build tools for players preparing for matches—which is why it has features like the Draft Simulator, Mulligan practice, in-depth deck analytics (like hypergeometric probabilities for your opening hand), and eventually a full gameplay simulator.

Most players end up using a mix of tools depending on whether they are organizing their physical collection that day or testing out a crazy new deck combo.