A convection Oven ( fan oven) is an oven that has fan to circulate air around food to create an evenly heated environment. Small countertop convection ovens for household use are often marketed as air fryers. When cooking using a fan assisted oven, the temperature is usually set lower than for than for a non-fan oven often by 20 degree centigrade to avoid overcooking the outside of the food.

An OTG Oven ( Oven, Toaster and Griller) is a kithchen appliance that can bake, toast and grill and reheat food. OTG are portable making them good choice for small kitchens.

They can–

Bake cakes, cookies and pizzas

Toast bread, Grill sandwiches and vegetables

Reheat food and Barbecue