That is one thing that shocked me, but the other thing which shocked me is that my sales have been steady throughout the whole time I have been selling Subnet Calc Pro, with no sign of stopping yet. There was a spike around the time I released an update to Subnet Calc (the free version) which now has an up-sell page on it to encourage users to upgrade to the paid version. If there is a trend at all with my sales then it’s an increasing trend as well, which I am obviously very pleased with!

Here is the graph of my sales from 1st February 2009 until today, 16th May 2009.

The bottom line is that this has proved to me, and I hope others who read this, that the iPhone platform is a great platform to work with because you can go from never written a line of Objective-C to a full paid application, earning £££/$$$ a month. OK my app won’t support me fully, but it certainly is some very handy pocket money which will enable me to continue in my iPhone efforts and hopefully produce even more apps.

My experience at getting from a non-iPhone developer to successful application selling on iTunes has been an interesting ride which I have enjoyed very much. It’s exciting to be part of what seems to be a great technological revolution.

My current efforts have been focussed on my new app, BeerMap which I am hoping shall be released soon!

I hadn’t had any reviews of Subnet Calc Pro, but I was using AppViz today and I noticed a review! I thought, oh it’ll just be a short one, but no, it was a full blown review! Awesome! And better still, it’s a glowing 5-star review which I thank you (whoever you are) very much for .

The funniest bit of the review was where he says:

The only con I can see is “Organizer” is misspelled as “Organiser,” but no big deal. The concept is still there.

And if the only con is that I’m English and therefore, speak English, then woo!

Here is the review in full:

I must admit, I was initially skeptical when I saw this advertised. I immediately thought “oh, another subnet calculator, how novel.” Upon downloading and trying it out, I was amazed at it’s capabilities.

Pros:
1) Organizer – solid understanding of the radix (or binary if you prefer) tree when creating the subnet entry. Also the ability for it to calculate and display the host portion of the ip address so you can add a hostname and a description to each is a very nice touch. The use of the iPhone’s memory is also very efficient.

2) Finder – finally, an application that can aggregate! This excited me the most and it does work and give you an accurate prefix. Now, granted, any network admin is able to create a prefix summary in 2 seconds, but this is actually nice and convenient. In addition, you also get other useful info such as network id, broadcast, usable range, etc.

3) Calculator – handy feature to quickly help you break down any ip address with your cidr selection into the same useful information such as network id, subnet mask, usable range, maximum number of hosts, etc. Even better is you can see the addresses broken down into both binary and hexidecimal addresses which are both handy in their own rights.

4) Email data export – handy when you want to send a summary of what you had added in the organizer section.

The only con I can see is “Organizer” is misspelled as “Organiser,” but no big deal. The concept is still there.

Future suggestions (if the developer is taking any):
-calculate binary and/or hexidecimal to decimal format.
-Add screenshot to show off the Finder selection when advertising within iTunes.
-shorten the application’s name on the iPhone home screen. Currently, it shows as “Subne…cPro.”

Overall, a very nice job!

So, I immediately jumped on the review and I’ve changed the screenshots around to show the finder, which I had previously omitted from the screenshots (you only get chance to put a total of 5 up and I didn’t have room, but now the finder has taken priority over another one). I know I should make the application name shorter, but I didn’t know how I could shorten it really – any ideas? SCPro maybe?

Hopefully this will be the start of something more with respect to iPhone apps. I’ve got plans for others, which I will be starting work on one of them soon. It’s quite an interesting app which uses the GPS function of an iPhone which should be fun to try and play with!

I really hope that people like it…

I feel that I worked extremely hard on it and it was at a stage where it was ready to be released. However, I do plan to release updates in the future as and when I implement new functionality. I do have some plans, but any feature requests are much appreciated – simply pop over to the application page and submit a comment saying what you’d like to see.

I will be releasing a little guide onto this website soon which will show some screenshots to explain some of the features of Subnet Calc Pro

Anyway, in spite of all that, it’s coming along well and here are a few more screenshots:

[View with PicLens]

These screenshots show the top level of the organiser view (on left) which is where all your subnets are now kept. From here you can start adding new subnets and also drill down (on right) through the subnets to create a hierarchy of subnets. I thought this would be useful as it’s something which I will definitely be using at work!

These screenshots show the two different modes for viewing a subnet. The left shows a subnet being created for the first time and the right shows a subnet being edited which is also where you would view the subnet information at a later stage.

So, hopefully that has tickled your taste buds for more! Next to come is a means for automatically splitting a subnet up into sub-subnets (I really need a new name for that!) and a means for finding the smallest subnet which encompasses a given set of IPs.

[View with PicLens]