Kalmaro Calc provides easy to use calculators for all sorts of every day math. Quickly check which product is cheaper, 250g of flour for £1.80 or 500g for £2.50. Check which oven temperature is correct for your type of oven. Check how much the bill is split between your group or even check how much the bill is without the tip so you can pay the tip separately.
Current Calculators (Some needing a subscription):
Kitchen: Oven Temperatures, Volume Conversions
Finance: Amortised Loan, Rent PCM
Restaurant: Tipping
Percent: Percent of, Percent Difference
Shopping: Price Comparison, Sales Discount
DIY: Square Area, Length Conversion, Area Conversion
Terms of Use:
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/