First, it is able to determine the distance between specific facial markers, such as the eyes, nose, and mouth. This enables users to calculate the basic proportions of their faces, which is useful when choosing haircuts and make-up looks.

Second, it has the capacity to detect facial shapes. Various standard facial shapes include long, oval, square, round, triangular, diamond, and heart-shaped, and understanding which one your face belongs to will help you choose the most appealing haircuts and accessories.

Apart from these basic features, it may have the ability to evaluate facial symmetry and asymmetry, highlight areas of the face where wrinkles and lines could appear, and anticipate how your face will change as you age.

The calliper: It is a specialised measuring instrument that may be used to measure the distance between distinct facial features. 

A photogrammetry system: It employs many cameras to record 2D photographs of the face from various angles and then uses software to produce a 3D model.

Facial recognition software: This technology analyses face traits using complicated algorithms and is extensively utilised in security systems, social networking platforms, and other applications.

It may help people in choosing the most appealing hairstyles and accessories for their face shape and dimensions. This is especially useful for people who wish to transform their look.

FSCs are used in the cosmetic industry to figure out places of the face where wrinkles and lines are likely to emerge, allowing people to develop a customised anti-ageing skincare schedule. Furthermore, certain FSCs can forecast how a person's face will change over time, which is useful for people considering cosmetic surgeries.

Face calculating technology can be employed in the medical profession to help in evaluation and treatment planning. For example, it may be used to assess facial asymmetry in individuals with illnesses such as Bell's palsy or TMJ dysfunction or to detect changes in face shape caused by disorders such as Crouzon disorder or craniosynostosis.

Round face:  It features a broad forehead and cheekbones, as well as a rounded jawline. To calculate the breadth and roundness of the face, the calculator will measure the distance between the forehead and the jawline.

Oval face: This is a proportionate face shape with a little wider forehead than the jawline and a rounded chin. To calculate an oval face shape, the calculator will measure and balance the distances between the forehead, cheeks, and jawline.

Square face: It features a strong jawline, a wide forehead, and prominent cheekbones. The calculator will measure the length between the forehead and the jawline and ensure that they are both of equal width.

Heart-shaped face: It features a broad forehead, high cheekbones, and a pointed chin. To calculate the balance between the two, the calculator will measure the distance between the forehead and the jawline.

Diamond-shaped face: It features a small forehead and jawline, with broader cheeks. The calculator will calculate the length between the cheekbones and ensure that it is more than the distance between the forehead and the jawline.

Long face: It has a greater length than breadth, a high forehead, low cheekbones, and a long and narrow jawline. A long-shaped face is normally determined by analysing the length-to-width ratio of the face, the location, and size of the forehead, cheekbones, and jawline, as well as the size and shape of the upper, middle, and lower facial areas.