Greg McCormick

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Icon and Default Screens

As a cross-platform developer, one of the things that you have to consider are the various image sizes that are needed for your loading screen and app icon.  If you don’t know by now, Android and iOS have a variety of sizes and file structures to meet the needs of the different screen sizes and […]

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A/B Testing on in App Purchase

In the last few months I have been asked a lot of questions about A/B testing.  The questions have come from all different perspectives.  The questions go something like this: Have you ever done and A/B test? Are A/B tests complicated? Do you think that A/B testing is worth it? So what I thought I […]

1RepMax

1RepMax

One rep maximum (1RM) in weight training is the max amount of weight one can lift in a single repetition for a given exercise. One repetition maximum can be used for determining an individual’s maximum strength and is the method for determining the winner in events such as powerlifting and weightlifting competitions.

Recent Posts

Note to self: In-App Purchases

Every time I go to add an in-app purchase to one of my apps, I forget the pattern that was set up for my Product Id.  I like to use the reverse domain and the product name tagged on the end like Apple suggests.   A product identifier is a string used to uniquely identify […]

Xcode 6 fixed archive functionality

I just noticed that in Xcode 6, you no longer have to disconnect your device to build an archive.  In the past I always forget to disconnect and it would drive me crazy.  I see that now, it does not matter if the device is connected or not.  Very nice.

download error

Your App can not be loaded because it is not a valid application.

This week I ran across an interesting problem. I was taking an older version of one of my company’s apps and making some minor feature adjustments and redeploying. I spent about 5 hours updating the code, debugging and testing. I then spent about 16 hours trying to get the changes to deploy on my device. […]

Configuration Web Services

There are several excellent open source projects out there that allow developers the ability to add excellent utility to their apps.  There are apps to help your app store rating, force users to update their app, provide users with release notes and tons of other cool things.  One of the things we have found really […]

Apple App Store Release Data

Item Type Description Limitations SKU Text a unique identifer that you can assign your app.  often it is strictly numeric Bundle ID Select from List typically this is assigned by the developer early in the development process Default Language Select from List Version Numeric Seems easy, but you still need to know Primary Category Select […]

Automated build of Icon/Loading Files

I wrote a post a while back about using Image magick and a bash script to quickly to create the various size app icon images you need for your mobile app.  This is just an updated version of that post. Automated build of Icon/Loading Files  (originally posted 3/24/2012) Because of the number of different icons […]

Icon and Default Screens

As a cross-platform developer, one of the things that you have to consider are the various image sizes that are needed for your loading screen and app icon.  If you don’t know by now, Android and iOS have a variety of sizes and file structures to meet the needs of the different screen sizes and […]