Huniebee

The HunieBee is considerably one of the most important devices in HuniePop, as it is given to The Player by Kyu toward the beginning of the game to aid them in many tasks, everything from remembering girls' birthdays to tracking them down to flirt with them and potentially take them on dates.

Trivia
The technology in the HuniePop universe has seemingly remained coherently consistent, even across non-canon releases, as the HunieBee phone's user interface is similar to the HunieCam protagonist's devices, presumably of one which include a computer, potentially constructed by the same brand which would explain the similar design choice made by the in-universe technology company.