A colorful calculator with BIG buttons, LOTS of features, and fully customizable.
・Dual-line display - shows the input and result at the same time
・History tape - saves every calculation, time and date stamped
・Memory buttons - shows its value on the display
・Percentage and backspace button
・Scientific functions
・6 layouts (3 portrait, 3 landscape)
・10 color themes
・Multi-line input for really long equations
・Automatic scientific formatting
・Label any calculation in the history tape
・E-mail a calculation or the entire history tape
・VoiceOver accessibility
・iOS 9 Split View
・3D Touch
・Today Widget (In App Purchase)
・Multiple History Tapes (In App Purchase)
Gestures
・Swipe down to see the history tape
・Tap & hold on the result to copy
・Tap & hold on the input to move the cursor, copy, paste
Customize
・Font Size
・Bold Font
・Color Theme
・Light Tape Background
・Show Layout Button
・Allowable Layouts
・Show Memory Buttons
・Backspace Button (Solid, Arrow)
・Replace ÷ Button With /
・Replace E Button With Hidden, EE, 00, or 000
・Show Thousands Separators
・Minimum Decimal Digits
・Maximum Decimal Digits
・Sound
・Equals Repeat
・Left-Handed Mode
URL Scheme: calculatorhdpro://
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In-Apps
Widget
$2.99
Multiple History Tapes
$2.99
Screenshots
User Rating
4.74 out of 5
253 ratings
in Australia
5 star
206
4 star
38
3 star
4
2 star
1
1 star
4
Ratings History
Reviews
Best one in AppStore for iPhone & iPad
STILL the best Calc for iPhone and iPad. Simple, usable and colourful. And the option to add a 000 button to the keypad for adding thousands in one tap.
UPDATED REVIEW v3.8 (April 2018). Option to display a single 000 button for adding Thousands in one hit was just added. Brilliant updated feature for business users on top of the best calculator in the App Store already. I actually requested this feature as a customer and the developer wrote back to me, and now it’s live in the latest update. This is a developer who really listening to customers and cares about his product and it’s usability. This is unquestionably the BEST, most practical calculator for iPhone and iPad. Use it straight away as it’s so easy to use, or take 5 min to customise your preferences to have your calculator setup the way you want it. Either way, you will love using it all the time. (Also - check out the rotate-to-see history tape feature). —————————— I bought about 8 of the top calculators to find one that I would want to use all the time on my phone and my iPad. This one is by far the best. It's simple, clean, no junk or ads, and it's coloured the buttons in a logical way that is helpful. There are separate memory buttons for Recall, Store, & Clear. This makes memory so much easier, and quicker to use. Also has a backspace button which is super useful and not on all calculators. The Memory Tape is really practical as well. If you buy this calculator you will definitely use it and be happy with it.
Great app
Easy to rectify errors if I enter incorrect numbers.
Decent App
I like da app 🤪
Extremely useful
I use this all the all the time on my iPad and iPhone. Great cash flow help.
Smart “smart” calculator
A delight to use. Would be good for classrooms as well.
Excellent simple but powerful
Straight forward and easy to use but capable of complicated problem solving with no difficulty. Easy to recommend this app, it’s become the one that I always go to when I need to calculate just about anything. Excellent, simple and powerful, great job folks, a great little calculator thank you.
Calculator
Simply the best for me, the only one with M+- on the basic screen!
A very good calculator app
Does everything I need and more, well and easily. A very good calculator app
Superb!
Great calculator, great layout & great interface highly recommend.
