TheChemandycalculatorsaredesignedtobeeasytouseandfollowacommonthemeandlayoutwherepossible.Mostofthemhavebeenusedforseveralyearsnowandcomplaintsabouttheiraccuracyorfunctionalityareveryrare.Wedowelcomethesehoweverandthereisacontactlinkonthebottomofeverypageforthispurpose.