Yes, visit App store with search term iMarkup to find an app. This is not a free App. Images on the store look promising. This app can be used for cost, tax and profit markups. There are lot of other apps available in Playstore as well for free and at a cost. You need to browse and find which one suits your purpose. Appstore: http://iTunes.apple.com/us/app/imarkup-markup-calculator/id328346736?mt=8
A markup calculator is a calculator that calculates the percentage of a markup. These calculators are usually on shopping websites and banking websites.
A markup calculator helps you determine the selling price of a product but you have to know the original cost as well as the percent markup. You can get them online for no expense. I've linked one for you. http://www.pine-grove.com
If you thinking of opening up a restaurant that will serve alcohol. You can find a markup calculator that that you want to sell on http://abc.utah.gov/vendor/price_calculator.html
Pcalc Lite is the best calculator app for iPhone (iOS)
Only If you download a Calculator App, yes.
Yes, you can get an app for your iPhone for an amortization mortgage calculator at the following site...itunes.apple.com/us/app/mortgage-calculator-extra/id396886949?.
A markup calculator is used to work out the final retail cost of an item if you know the price it was bought for and the percentage markup (how much profit) you want to make. There are online calculators which can do this automatically for you, or you can just use a normal calculator: for example, if you buy something for 100 and want to make 20% profit, the final price should be 100*1.2 = 120.
When in the calculator app, hold your phone longways.
Scientific Calculator
No
an app that tells a prediction of your age
Yes there's a app for that