After installing the Hearts Expansion mod in Minecraft PE, you will have only 5 hearts, and gradually you will be able to increase your health reserve to 30, but only if you do not die.
After each death in the game, 1 heart is taken away, and you need to try to add it. You can replenish the stock of hearts with the help of crafting in Minecraft Bedrock Edition. There are two options – simple and ordinary. In a simple fashion, crafting is cheaper, and the whole point is to easily get additional hearts in Minecraft on a tablet.
In the regular version of the Hearts Expansion mod, pumping is more difficult and more expensive, which makes survival in MCBE more interesting. You just have to choose which of the mods to download for your card. Good luck!