ELO Rating app for iPhone and iPad

Description
ELO rating is a method for calculating the relative skill levels of players in competitor-versus-competitor games such as Chess.
The K-factor setts the value for different players at a different strength.
Players with less then 2400 will sett the K-factor to 20 in FIDE systems and to 24 in USCF systems.
With more then 2400 ELO points the K-factor will be sett to 10, respectively to 16 in an USCF match.
K-facktor 40 / 36 are used for player under 18 years and with a rating under 2300.

You can switch the black and white rating to see the result for your opponent!
The system calculates values for win with (1), los with (0) and remis/draws with (=).

Please do contact me for any improvements! ;-)
Have funn!