Awesome! Haven't done anything iOS-related in a while so I'll have to brush up on the iOS development courses, but I'll definitely give this a shot!

Oh great!, I will work on it.

Great, nice job !

This is brilliant! I can't wait to enter!

Great, should it be compatible for both iPhone and iPad?

Have the code written and running well...just need to design it now lol, lets see how this goes..

do we get some type of accreditation for winning?

i want to be able to showcase treehouse as like a portfolio for all my learning.

Hey Amit ,

I m really looking forward to this.... I dont know if i would be able to submit on time .... but will definitely submit.. and try my level best

I'm in!

Glad to see so many participants. Can't wait to see what you guys build. Good luck everyone!

Woot woot! :)

Hi Guys!

Can't wait to get cracking, I joined Treehouse a few months ago to make iOS Apps but I didn't make many apps. But hopefully this will get me back on track to becoming an iOS developer.

Thank You :-)

Great idea! Let's make it happen ;) !

Cool! I've always wanted to learn to build an iOS app, and this contest is really motivating me!

Here is my entry for the contest: https://github.com/zdaz/Simple-Calculator.git

Click here to see my entry for the contest

Here is my Calculator for the contest github

You can view screenshots via my portfolio || blog Code A²

This is my version of the calculator in progress: GitHub

It's such a pity that I'm currently on tour in Germany so I'm only able to work on it when I'm having a pause at a Cafe/McDonalds/Starbucks ... and this weekend I even won't have cellular to update something (and no, I'm not expecting any McDonalds/Starbacks/etc. with WiFi where I'm going to be then :-) )

So good luck to everyone and use your time wisely :-)

Kind Regards Holger

All great submissions so far and looks like this competition is heating up! Keep them coming!

Here is my submission on Github! I decided to build an addition calculator for kids, so I designed a kid-friendly app called "How many paws?". When a number is pressed, a corresponding image with a given # of paws appears. Here are some screenshots from the app. :)

Code-wise, I decided to program the app so that it takes a string of numbers and addition operators, then splits the numbers by scanning for addition signs. I then push the numbers into an array, convert them to integers, and calculate the sum. This approach allowed me to still display the numbers as they were being added, which is a great feature for kids so they don't have to hold numbers in working memory. If I were to include additional operations, however, I would approach the code differently, calculating as I go, rather than at the end.

Hope you enjoy the app! :)

+1 Awesome job Novall.

It's a shame I can't take part in this challenge as I am still learning the basics, but I think these challenges are a great way to test your learning skills.

I'm loving it, Novall! Damn, the competition is getting heated.

Figured I'd throw my entry into the hat: it's now alive on GitHub. I had a lot of fun, and trying to make it as lightweight as possible was cool. It looks best on the 4-inch iPhone's display, and here's a screenshot.

P.S. Swipe down with two fingers! (inspired by Tweetbot)

Hope you guys like it! :)

UPDATE: The latest commit brings iPhone 3.5inch screen size support.

UPDATE AGAIN: Better design.

This has been so much fun.

I vote to have more competitions like this in the future so that everyone gets in the practice they need to become better programmers. Rails competitions, Javascript game competitions, etc. This is a great idea.

Hi Guys,

Please do pardon me for the very elementary nature of the app. This forum contest has really encouraged me to make more apps!! and hopefully soon I'll get the skills to make the apps I want.

https://www.dropbox.com/s/18iakblz6pwnq6t/calculator.zip

Here it is

LOL, thanks for the words of encouragement!! :-). This is actually the first app I didn't use a video tutorial for, all the other apps I made were literally copied step by step from a video.

Hi guys! I've uploaded my contribution to the contest to Github. I used the library DDMathParser which made easier to do the calculations. Cheers,

I think i may either submit tomorrow or friday.

This is great, i'm currently learning iOS so i won't be able to submit so soon but i'll definitely give it a try :)

hi ! I do not think that Apple is going to use it by default on the iPhone 6 but ... here is the link to my calculator https://github.com/KevinDesloges/iCalculate :)

thank you, I still have much to learn, and I don't know why the result displays decimal but I will check my code and tried to settle it. ps. sorry for my english. héhé

Two days to go, hope i can make it! :)

Here's my submission! I call it Swipe. Once you have it open and running, you simply tap the numeric keys and swipe in particular directions to perform operations!

• Swipe up to add
• Down to subtract
• Right to multiply
• Left to divide
• Shake the device to clear all.

It's my first fully complete app! It now supports both screen sizes :D Maybe not the most efficient solution to the problem but it worked well within the time I had. I very much hope to work on it further over time. Thanks for the inspiration!

I've tried to follow iOS7 standard design principals, but you be the judge. Good luck everyone!

Hi guys i really need ur help i made the project but the moment i upload it at github or dropbox the the image which i added are not showing up and the project is giving me an error. I dont know what is the correct way of uploading the project so that data or image files are nor lost.

Please help I have worked so hard for it and at the last moment things are not working out. I mean the project is working fine in my system but the moment i downlaod it from github or dropbox the files are not being copied.

Simple neon looking addition calculator. Allows add positive and negative integers. NeonCalculator

Well done Nadezda, I like the colors.

Hi guys sharing the link for my App. https://github.com/RashuBhatnagar/iosCalculatorApp

This is my first App ever... I hope you guys like it!!!!

One day left for submissions and so far I'm impressed with everything I have seen. This is going to be a very tough decision. Although, you should be proud that you built something. I cannot stress how important it is to apply what you learn because practice makes perfect :)

Thank you Treehouse for all the awesome videos, found making this app a good practice after those videos on iOS development. Just uploaded my submission to GitHub. Good luck with writing people!

Oliver nice job! love the color options!

Thanks, everyone is adding some features, so had to come up with something. Glad you like it!

Hi Olivier ,

Really a very pretty app and i really liked ur idea a lot....

Woo! Managed to get mine finished. I've put it up on Github here. Just a few minor things left to add (settings pane with night mode toggle + about this app), but I figured I might as well submit it now anyways.

Colby Well done! I like the display.

Big thanks to the Treehouse team for the awesome library of tutorials you all have created. I also love that you put on these fun contests to help drive students to learn in different ways. I have written a blog entry about this contest experience. I plan on further developing this app, so I placed it on Github for others to contribute and use code from it.

Some highlights from my blog entry to quickly explain what has been built :

Functionality

[button] display

• math operations [+], [-], [x], [/]
• percent ... [4] 4 [%] 0.04
• signing ... [4] 4 [+/-] -4
• clear / all clear ... [4] 4 [c] 0 and [ac] clears last operation
• decimal ... [4] 4 [.] 4. [6] 4.6
• equals after operation ... [4] 4 [+] 4 [4] 4 [=] 8 [=] 12
• operation after operation ... [4] 4 [+] 4 [3] 3 [-] 7 [2] 2 [=] 5

I always get annoyed when I accidentally hit the wrong number while in the middle of a multi-step formula. So I chose to add a "delete" button that removes numbers if they have just been input. It does not delete if the display is a result.

• delete ... [4] 4 [5] 45 [del] 4 [del] 0

Design & Experience

• works for both 3.5 & 4 inch displays
• simple iOS 7 look with better touch and selected animations
• resizable font size for display (like the original app)

Screen Shot (+ button pressed)

If only I had a mac...

What it's the hour deadline...? Thanks!

This has been such a great experience this week with this contest-project. I only just began IOS in the last few weeks, so when I first saw this contest announced, I didn't think I would enter. However, after a bit of google-ing, I found there are quite a few tuts out there for building a calc-app. I chose one from Lynda.com. All in all, I was challenged to get through the tutorial, design, and modify the app per constraints of the contest. I would just like to say that it's been quite lovely to see the submissions here, and to be a part of such a talented group of people. Cheers ~

My Project: (https://github.com/demetriusPop/Calculator/tree/master)

Congrats Paul, may this be a first of many apps to come.

Cheers,

A.

My Project: (https://www.dropbox.com/s/eboixyddyixj60q/Calculator.zip)

It was fun to code :) Design by Dmitry Rybalka

/Users/Home/Desktop/iOS Programming/Calculator/Calculator.xcodeproj

Hello, the truth is that this contest was great, until yesterday, Saturday, I started to work it through the whole night working on it because I'm fairly new but I hope you like it and give me feedback, this is my App on GitHub Greetings. Success to all.

Thanks for hosting a contest. Please do more of these.

https://www.dropbox.com/s/ozue3rna81li5q0/calculator.zip

...

how do i add my submission so when people click on the link it automatically downloads the project and opens on their computer?

it's different, but it gets the job done. Here's my submission.

https://www.dropbox.com/s/t8cfecb3clo3frv/PlusCalculator%201.zip

https://github.com/JinkProject/CleverCalc.git

A more extended version is already being worked on and will hopefully be finished in a couple of days. I'll finally have something on the app store!

Everyone has such nice calculators! Good Job!

Mine is a simple gesture based calculator (gestures ftw!). You swipe up to add, down to subtract, left to divide, right to multiply, long hold to clear, and double tap to calculate. I was going to make all of the numbers also be controlled by gestures, but it was way too buggy and hard to use. Note that it only works on lager screen iPhones (5/5s).

https://github.com/EltaruAppsDev/Raknare-A-Simple-Calculator

I will eventually put it on the AppStore after adding more advanced features (scientific functions, multiple line support, iPhone 4/4s support, etc;) to it, I guess.

Here is my Calculator app for the IOS app contest. I really enjoyed this project since I just started in learning IOS a week and half ago. I would love some strong criticism and advice about my project. Thank can't wait for the next contest.

https://www.dropbox.com/s/110b2kbsg9g5ql0/CalculatorAppContest.zip

Hey there, I update my App in GitHub I have removed the orientations that at not supported and also added some screenshot.

The idea of ??the app is that you can change color depending on your preference or the color of your iPhone.

It is compatible with iPhone 3gs, 4,4 s, 5 and 5s.

Try it and give me your feedback. Thanks.

Here some screenshot...

So who won?

What is the next contest?

Thank you so much, it really means a lot :-)! And thank you all for creating such awesome apps, I think it's been a great motivator for us all.

Like Holger said: Keep on coding!

Cheers

I think everybody is going to turn out to be great software engineers if they stick at it. Don't get daunted and don't let anything get in between you and your education (or don't try to it :P)!

Thanks a lot!