Japan - When 82-year-old Masako Wakamiya first began working she still used an abacus for maths -- today she is one of the world's oldest iPhone app developers, a trailblazer in making smartphones accessible for the elderly.

FUJISAWA, Japan - When 82-year-old Masako Wakamiya first began working she still used an abacus for maths -- today she is one of the world's oldest iPhone app developers, a trailblazer in making smartphones accessible for the elderly.