CalcRoll

Multiple roles calculator. 
The calculations and results appear to be recorded in the Roll Paper. 
# Seems to contain more than one calculator. 
You can calculate tax and units. 
Rewind the roll can be undone. 
You can keyboard layout the to your liking. 

The paid version is ad-free, further stability-oriented. 

Standard configuration 
Display digits: 15 digits maximum 
Arithmetic functions: arithmetic only 
Drum Number: 2 
Calculation method: expression calculator 
Number of decimal places: 3 
Rounding fractions: even rounding (ISO rounding, Banker's rounding) 

extra 
Internal Processing: 60-digit decimal arithmetic (fixed-point system) 
Number of drums: Up to 5 
Calculation methods: arithmetic formula or expression calculator 
Decimal digits: 0 and 5 F (up to 15 digits) 
Rounding fractions: seven 
Separator: Four 
Decimal points: Three

 

Application homepage: http://calcroll.azukid.com/
iTunes link: http://itunes.apple.com/en/app/id385216637
HTML Link example:
Native application URL string example: calcroll://
Extended example:
Tags:

Multiple roles calculator. 
The calculations and results appear to be recorded in the Roll Paper. 
# Seems to contain more than one calculator. 
You can calculate tax and units. 
Rewind the roll can be undone. 
You can keyboard layout the to your liking. 

The paid version is ad-free, further stability-oriented. 

Standard configuration 
Display digits: 15 digits maximum 
Arithmetic functions: arithmetic only 
Drum Number: 2 
Calculation method: expression calculator 
Number of decimal places: 3 
Rounding fractions: even rounding (ISO rounding, Banker's rounding) 

extra 
Internal Processing: 60-digit decimal arithmetic (fixed-point system) 
Number of drums: Up to 5 
Calculation methods: arithmetic formula or expression calculator 
Decimal digits: 0 and 5 F (up to 15 digits) 
Rounding fractions: seven 
Separator: Four 
Decimal points: Three