Looks like great and useful app. User ratings 4.7/5 ratings.
IOS MyScript Calculator- Without Ads/IAP
Also, Adding for Android Users MyScript Calculator - This one seems to be always free here but with Ads.
The new MyScript© Calculator 2 makes daily math fun and easy!
Calculator 2 turns your device into an interactive piece of paper. Simply write a calculation and it gets you the result in real time. Develop it further with editing gestures or by adding new elements anywhere. Reuse previous results with drag and drop. Calculator 2 interprets everything you do on the fly.
Calculator 2 is based on MyScript Interactive Ink®, the next step for digital ink. It is the successor of the award-winning first handwriting calculator.
BENEFITS AND FEATURES
· Write calculations in an intuitive and natural way without a keyboard.
· Erase easily by using scratch-out gestures to remove symbols and numbers.
· Drag and drop numbers from and to the canvas, the memory bar or to an external app.
· Copy your results to the clipboard or export them to other apps.
· Fractions: Display results using decimals, fractions or mixed numbers.
· Multi-line: Continue the same calculation on the next line or write several calculations on multiple lines.
· Memory: Save results into memory. Reuse them anytime in your calculations.
· History: Retrieve all your past calculations to reuse or export.SUPPORTED OPERATORS
· Basic operations: +, -, ×, ÷, /, ·, :
· Powers, roots, exponentials: 7², √, ∛, e³
· Miscellaneous operations: %, |5|, 3!
· Brackets: ( )
· Trigonometry: sin, cos, tan, cot, cosh, sinh, tanh, coth
· Inverse trigonometry: asin, acos, atan, acot, arcsin, arccos, arctan, arccot, acosh, asinh, atanh, acoth, arcosh, arsinh, artanh, arcoth
· Logarithms: ln, log
· Constants: π, e, phi
ive had the old version for ages, it's quite good for teaching kids math, and cool to see hand written numbers turn into solved equations.