Prism running on my calculator (Casio fx-CG50) : r/PokemonPrism
Pokemon Type Effectiveness Calculator | Devpost
Easy to read Type Effectiveness chart for newer players. Easy to read and understand (courtesy of GoHub) : r/TheSilphRoad
TSV Office Calculator, Standard Function Desktop Calculator with 12 Digit Large LCD Display, Solar and Battery Dual Power, Sensitive Button, Handheld Basic Calculator for Office, Home, School (Black) - Walmart.com
Pokemon type chart: All type matchups
Pokemon Moon Dual-Type Chart Map for 3DS by Muku6 - GameFAQs