Oleksandr Firsov

Rated 3.50(6) — Oleksandr Firsov

This training game is developed for improving attention,concentration and organs of perception. Game is based on combat simulator of fighter jets. It includes 16 levels.Every level is unique and provide higher difficulty, which help to develop sensor...

Rated 3.83(18) — Oleksandr Firsov

Stuck in kitchen with dilution of vinegar or in chemistry class trying to solve what you need to add to get solution of particular concentration? Than this calculator is for you. With it's friendly user interface and simple yet lovable design this app...