Function Inspector Web released!

Recently, I released Function Inspector Web! It brings most of the functionality of the Android App to your browser.

Here is a screen shot of functioninspector.com:

It's features includes:

• Plotting various functions
• Including parameters which can be dynamically changed
• Analyzing the function's roots, extrema, inflection points, discontinuities and intersections with other functions
• Providing a simple to use user interface

Please enjoy!

Function Inspector special offer!

Here's some good news: Function Inspector PRO will be available for only 0.50 € starting now and ending this sunday!

You can buy it from Google Play.

But wait, you can also get it for free! All you need to do is to share this picture publicly on Facebook and fill out the following form. This also ends on Sunday! And: please allow the Unlock Code distribution to take some time, I need to do it manually.

Attention: this offer is closed by now.

Accepting Bitcoin

Starting today, I am accepting Bitcoin donations. Don't know Bitcoin? You should!

It is a digital currency that is not controlled by any central authority which, IMHO, is a huge benifit over any currency distributed by any state. That is why I want to encourage using it and, for now, I do so by accepting it for donations.
Now, if you are not terribly excited about making donations, but consider buying Function Inspector PRO, you should contact me and we'll see if I can sell you a promotion code for Function Inspector Unlock using Bitcoin!

For donations, please use this:

$

Function Inspector Unlock - Get code for free!

One thing I always wanted to do with Function Inspector PRO is to give it away for free - not in general, but at least to some. This has always been difficult as, to my knowledge, no Android market offers this functionality. The only alternative so far was to send the PRO APK directly to the user which means that the user will not receive any updates and developers give up any control of how many people use this app.
That is why I was glad when I first heard about BoomCodes. The idea is simple: Developers can generate promotion codes, issue it to their users who will then be able to unlock the PRO features. Once the features are synchronized, the app works just like the PRO version; updates will be issued via the market.

So, I published Function Inspector Unlock which will do exactly that! I don't really know yet what I want to do with this in the future, but I could imagine using it for promotion on my Facebook and Google Plus page, rewarding beta testers and translators or offering alternative payment methods.

For now, I will just give it away for free!

The first 5 folks that enter their Email address in the form below will receive a free promotion code for free that will allow them to unlock PRO features at Function Inspector Unlock!

The 5 free codes have been distributed! Thanks to all participants.

Function Inspector 4.0 Release

So now it is done, I finally released Function Inspector 4.0 to Google Play. I don't want to talk a lot of the changes because I already have. My special thanks goes to the beta testers!

Here are to pictures that display the main visual changes: New design, new UI and, finally, a "Help" menu ;)

Function Inspector 4.0 Beta Testing

With this version of Function Inspector 4.0 Beta you will
be able to return directly to this post as well as switch to
the PRO version (must be redone after restart).

I have made some progress after my last post. I have redone the design and User Interface, fixed several bugs and added a Help dialog. More importantly though, I have reorganized the existing code and changed a lot under the hood. There is basically not much that has not changed ;)

Also, I have had some problems in the past with issues that occur only on certain devices, on certain Android versions and so on. It is not that easy for devolopers to make sure that those problems won't occur

That is why I need you to test the Beta version of Function Inspector 4.0! If you have some time and are interested in the new features of Function Inspector, you would do me a great favour if you would install this version on your device and report any issued you may have with this. In the app, you will easily get back to this post in order to receive newer versions or track issues.

This version contains all the features that will be part of Function Inspector 4.0 except for some design elements and translations. If Beta Testing goes well, I will hopefully be able to release this in a few days ;)

Thanks in advance!

Download Current Version

Function Inspector 4.0 Beta 1 (9-11-2012)
Function Inspector 4.0 Beta 2 (9-13-2012) (Bug fixes, Color Scheme, New Design Elements)

Issue tracker

I'm back!

It has been some time since I last posted here or published an update to one of my Android Apps. This has a lot to do with my studies in Software Engineering as well as a new job I got.

But now, I'm back to continue my personal projects. Of course, the main focus will be on Function Inspector as it is by far the most successful and most complex project for now. Function Inspector LITE, for example, has been downloaded almost 80,000 times...

Yesterday, I published an update fixing the issue you can see on the screenshot I got from a user. This occurred on Android Jelly Bean for the first time, I'm sorry for any inconveniences ;)

So there is a lot to do. This is my To-Do-List for Function Inspector:

• Refactoring: Most of the code is older than a year, and I'm pretty sure my programming skills have improved since then ;)
• Performance improvements and bug fixes: Some parts of the app could probably be optimized.
• Design: The design of Function Inspector seems kind of outdated and does not fit into the new Android 4.x design. For example, I could get rid of the menu button.
• Tablet support: The Function Inspector UI works fine on tablets, but it could certainly be optimized.
• New functionality? Here, I'm hoping for some user suggestions.
• Marketing: As satisfying as download numbers are, there are many people out there that could probably need this app.

So as you can see, it won't get boring!