# Function Inspector PRO – Fantastic Plotter, Fantastic UI

Tested version: 3.1
Requires Android: from 2.2

### Summary

Have you seen a few Texas Instruments or Casio calculator-look-a-likes floating around on the Market? I have, and I can’t say that I’m a fan—they’re too squashed looking andand clumsy to use. Function Inspector PRO on the other hand has a great, cleaned up UI that’s functional to boot. But is it really all that and a bag of chips? Find out in today’s review.

### Features & Use

Section rating:

Test device: LG Optimus Speed / 2x
Android version: 2.3.4
Mods: Root

Function Inspector PRO
comes with a lot of useful functions. It impressed me right off the bat: rather than use the standard Android keyboard, there’s an option for using a mathematical input method, meaning you don’t have to go back and forth between the letters and numbers keyboards.
There’s sine, cosine, logarithms, as well as more advanced functions such as hyperbolic Arcus tangent. There’s an option for saving your most used function equations; once one or more functional equation has been entered, they appear as a graph, in different colours so that they’re easy to spot.
You can zoom within the graphs using pinch-to-zoom or the zoom buttons. Hit the ‘+’ button at the bottom left to get back to the beginning of the function.
When you enter a functional equation with the parameters (a, b, c), you can change said parameters dynamically in order to see what the effect on other parameters within the graph will be.

The app can also be used to display the nought position, peaks, inflexion points, discontinuities and intersections of graphs. Hit any of these in order to see their coordinates.

There are two other modes for the graph: Trace and Slope. Trace displays all coordinates; simply swipe your finger across the different parts of the graph. You can also establish a functional characteristic, of which you wish to work out the functional value.
A table of values can also be displayed; simply set an initial and a final value, as well as the interval.
In order to move the graph, use two fingers to swipe across the screen.

Using the Slope mode you can assess and display the gradient of any point., as well as its tangents. Again, it is posible to set up a table of values, as well as set a functional value of which you want to work out the function's gradient.

If you’re not a huge fan of the dark look of the app (literally, not atmospherically), you can change it in the settings. There’s also a full screen mode which is great for people who have small screened devices but want to be able to see a lot of the graphs.

One final and very useful function: screenshots! You can take screenshots of your graphs and equations and save them, which is super useful, especially if you have to explain something to someone.

Bottom line:
Function Inspector PRO is a useful tool, especially – I’m guessing – for students. Whether you need to double check your calculations or want to check out what effects certain changes would have on a function–Function Inspector PRO won’t let you down.
It has all the same functions and features as a calculator, but it’s a lot easier to use.

### Screen & Controls

Section rating:

As mentioned, Function Inspector PRO is very easy and intuitive to use. The UI is user friendly and the functions are well sorted, meaning that you can find them without any hassle.
My honest, humble opinion: the UI is gosh-darn-near perfect.

### Speed & Stability

Section rating:

Function Inspector PRO works brilliantly—it calculations functional graphs very fast and efficiently. The overall performance was excellent. Hats off to the young developer!

### Price/Performance Ratio

Section rating:

Function Inspector PRO is available for 1,49 €–a fair price for such a useful, well-functioning application that will help you save time if you do a lot of work that requires suing a calculator.

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### Developer

Georg Wiese

Germany

19 years, student, Android developer

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Function Inspector LITE
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## All Test Reports

Oct 25, 2011 2:16:09 PM

en francais

A Google User, Mar 20, 2013
Missing 3D plot Missing 3D plot
A Google User, Mar 14, 2013
All the features I wanted and more ...Graph image export, tables, easy to use keyboard, and all the tools needed for teaching algebra. One suggestion, I spent days trying to find an app just like this one. I may be bad at searching :) But The name of this app made it difficult to find. I'm very glad that I did...my search for a functional graphing calculator is over!! Thank you for creating such a useful app. I very much appreciate it.
A Google User, Jan 29, 2013
Great Very useful. Decent UI
hfg, Sep 30, 2012
Great app!
HardRic, Sep 24, 2012
wow It's really useful right now, thanks!
Rafael Coutinho, Sep 20, 2012
Update feedback After the last update, this app is forcing close.
Duane, Aug 22, 2012
Better than it says It says you can plot up to 3 functions. This is a lie. I'm not sure what the cap is, but it's way higher than that. Awesome app.
ku4tp, May 20, 2012
OK as long as you don't use ICS Graph lines will not draw on my A500 with ICS. On my 2.x devices it works great!
Geoff, May 13, 2012
Best grapher Has very handy zoom and trace buttons, and recenter & square grid controls. Option for white or black background is good. Sliders for graph animation excellent.
Toby, Apr 18, 2012
It does what I want!! Finally, something that actually does what I want it to do! Plus its really easy to use
guy, Apr 5, 2012
Excellent !! Best app I have ever seen for functions!
Abouzar, Mar 30, 2012
Nice The only down side is that the curser is not visible when typing which makes editing really difficult.
Anonymous, Mar 16, 2012
Great Graphing APP Love the options available and the beautiful dark background. An excellent program for graphing. For future updates I would like to suggest the use of JPEG or similar types of picture formats to be loaded in back of the axis' and perhaps the use of natural display as the Casio Przym series of graphing calculators. Thank you for all your hard work!
Pete, Dec 9, 2011
Very Useful Program I'm using this to help teach my son algebra. Best graphing app I've found, and I tried quite a few before settling on this. The developer was very helpful when I contacted him too.
Lazaro, Sep 9, 2011
Quiet useful
Bryan, Feb 16, 2011
Really useful