iPad Screenshots


15E scientific calculator is a high-end scientific programmable calculator for iPad, which behaves exactly like, and supports all functions of HP 15C Scientific Calculator.

Built with identical mathematics and algorithms, it delivers the same capabilities and better performance.

It can perform numerical integration and solve the roots of equations in addition to supporting complex numbers and matrix calculations.

**** Features *****

• Root finder

• Numeric integration

• Complex numbers

• Matrix operations

• Hyperbolic and inverse hyperbolic trig functions

• Probability (combinations and permutations)

• Factorial, % change, and absolute value

• Random number generator

• RPN entry

• Programmable

• Automatically save/restore settings.

• Multiple wallpaper options.

• More ...

**** Support *****

Feel free to contact us if you need any support by visiting www.vicinno.com or simply email us at support@vicinno.com.

**** Stay tuned ****

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What's New

Version 2.5

ready for iOS 7.

Customer Reviews

4.2 out of 5

5 Ratings

5 Ratings

Dynamite 15C!!


This is an excellent version of the 15C! I have both this HD version and the iPhone version and have no problem paying for both for this magnificent, extremely popular 32 year old calculator. In order to use this calculator you must press the "on" button -- earlier reviewers mentioned they couldn't get anything to display and it's because of this. There is full access to the 15C manual. The look and feel of this iPad calculator is excellent as it brings IOS and the vintage HP look together. I was able to load one of my decimal to binary conversion programs into the registers and it works just as the real 15C does.

All I was hoping for!


I've been using an hp15c for umpteen years as an engineer and was looking to purchase a used replacement. By serendipity I happened upon the hp12c for iPad/iPhone which I bought for my wife (yes, she loves it!).

This iPad/iPhone hp15c gives me all the original did plus more.

One thing, I wish it had a full screen mode.

Want a refund


I'm a long time 15c user and Found this app which looked good. I just downloaded it and it does not work. I touch the keys and nothing. Very frustrated and I would like a refund.


Vicinno Soft LLC
17.4 MB
Requires iOS 4.3 or later. Compatible with iPad.
Age Rating
Rated 4+
© Vicinno Soft LLC, All Rights Reserved


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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