TLDR: lacking poke paste but very good calculator.To start, i highly recommend going into settings and turning off "Champions mode". This is on by default and changes EVs and IVs to Stat points, which are more ambiguous and not used outside of champions. Second, you can only select up to 4 pokemon in the speed calculator. I can understand why, but i was hoping i could input a big list of pokemon and create a speed teir chart, if this gets added i will change my rating. Otherwise this is a great alternative to the showdown calculator. There are many small pieces of polish such as natures being grouped by what stat they boost and the option to change what specific game you're playing in show the developers genuinely put effort into this. The lack of poke paste option is a very big issue however, the time it takes to import your and other pokemon manually means it can't be used mid battle (if you're that kind of person) and means you can swap between different pokemon on a team to quickly test calcs. This alone knocks it down to 4.5 stars for me, however if this gets added i will change my rating.
Hi, in Settings > Manage Custom Builds, you can find an option to import builds from pokepaste. I’ll look into the speed calculator change but in general my goal is not to replace existing desktop calculators but provide a mobile-friendly alternative, so advanced features like that tend to be out of scope for this app.