This add-on adds 3 gravestones that spawns and picks up your items when you die.
They have their own inventory you can unlock and access it and retrieve all your items and pretend nothing happened.
This add-on can store your items when you die but it can't save your items from lava.
When you die you will receive a Grave Key.
You can use this grave key as a crafting recipe to craft the Instant Grave Key.
The instant grave key will let you teleport to your previous location where you died.

DISCLAIMER: This is an unofficial app for Minecraft Pocket Edition. This app is in no way associated with Mojang AB. The Minecraft Name, Minecraft Mark and Minecraft Assets are property of Mojang AB or their respectful owner. All rights reserved. According to http://account.mojang.com/documents/brand_guidelines