Wiki for Minecraft.
Wiki for Minecraft was brought to the app stores by Curse. This app has all recipes and is a guide. This app is perfect for you if you cannot remember how to craft a certain item or are new to the game.
Fandom: Minecraft was brought to the app stores by Fandom powered by Wikia. This app is more community focused. It features fan-created tips, articles, and discussions all for minecraft.
Official Minecraft Wiki
( http://minecraft.gamepedia.com/Minecraft_Wiki ) Is basically the website version of Wiki for Minecraft.
( https://www.planetminecraft.com/ ) Is a pretty good site. You can get skins, mods, banners, use forums, and more. Though I must say to watch out when downloading things. I have heard of people getting malware and viruses from seemingly harmless downloads.