Sometimes, you might want a bit of extra challenge in Minecraft PE, and that's where the Small Inventory addon comes in handy. It limits your inventory to just the nine slots on your hotbar. This can be particularly useful on PvP servers, where limiting how many items players can carry adds a strategic element. In survival mode, the limitation forces you to manage your resources carefully and make frequent trips to store items, adding a new layer of difficulty to the gameplay.
Credits: Iron11