Periodic Table is leaving search traffic on the table

Your title leaves half its space unusedTo improve

Length alone wins nothing here. What ranks is the searched term your title carries, and half a title carries far fewer of them, so you turn up on far fewer searches.

Field usage: 14 of 30 characters

Your short description repeats your titleTo improve

Stores index a word once per listing, so a repeated term buys you nothing and burns a field you only get one of.

Your title aims above your weight classTo improve

The most valuable field in your listing is spent on terms owned by much bigger apps, so it ranks nowhere.

You target terms bigger apps already ownTo improve

Outside your title, several of the terms in your listing are held by apps far bigger than yours, so that space ranks nowhere.