This week I did a presentation at the London iPhone Developer Group meeting. Given my experience with using lots of APIs, I thought it might be a good, if dry, topic. I tried to spice it up by complaining about lots of them and trying to condense that negativity into some useful lessons to take away.

Most of the other discussions of this subject that I’ve seen focus on designing libraries but I thought the same lessons could be applied to all kinds of interfaces, from Objective C libraries to REST API’s for connecting to web services. (I don’t mean to suggest that the focus of the two articles I link to is wrong. They’re both very much worth reading.)

If you follow any iOS technology blogs you might have seen this recent scandal:

If you bought the app on Google Play (even if you cancelled the order) I have your email address, your suburb, and in many instances your full name.

This, they say, is bad because this is not what happens with Apple’s App Store.

However, I don’t think Google are doing anything weird here, and I say this as someone who is not a fan of Android. The commercial relationship between developers and Apple is different from the relationship between Google and developers¹.

Eric Schmidt says Google is the new Microsoft and it’s winning the war against Apple. I think he’s missing some perspective.

One of the key things that Steve Jobs realised when he returned to Apple in the late nineties was that the industry is not necessarily a zero sum game.

“We have to let go of a few things here. We have to let go of the notion that for Apple to win, Microsoft has to lose.”

Like all the best upgrades, iOS 6 is almost entirely invisible. It works just like iOS 5 — which is to say, pretty well most of the time — but with some convenient new additions. Also, unlike version five, it’s been relatively stable throughout the beta process.

What’s new and what will you like? I’ve grown so accustomed to most of them that I had to look up the “What’s new” page on Apple’s website. Really, that’s a good thing. Invisibility is the fate of a feature that’s quickly integrated with how you use a device. (The thing that makes it tricky is that it’s also the fate of a completely useless feature that you never use.)

I’ve been using Mountain Lion, the new version of the Macintosh operating system, for less than a day so this isn’t intended to be detailed (see John Siracua’s review) or thorough. I have, however, kicked the proverbial tyres so here are a few, quick thoughts.

Good

• Probably the most stable 10.x.0 release I’ve used
• Little earth shattering but lots of really nice improvements, not all of which I’ve seen documented (for example, attachments in Mail now appear in the “All My Files” view in the Finder, multiple Time Machine disks)
• Notification Center works well; AirPlay mirroring is going to be really useful
• I’ve not found any software that worked in Lion that no longer works. That includes stuff like VMWare (scary because it’s low-level) and Photoshop Elements 6 which is not listed on Roaring Apps compatibility list

Bad

Imagine the scene…

Okay, that’s a bit dramatic.

Recall that I have an iPhone app called Yummy. It has, or rather had, a website called YummyApp.com. Last year I formed a company called Wandle Software and since then have been merging my various web “properties.” The website moved over to wandlesoftware.com earlier this year, email was the last thing that needed transferring.

My email is hosted using Google Apps — Gmail but without the gmail.com email address if you’ve not heard of it. What I wanted to do was move yummyapp.com from being a “proper” domain to what Google refer to as a domain alias for wandlesoftware.com.

This is really starting to bug me. Nearly a week after Facebook’s IPO and the papers are still saying that it was a failure. It wasn’t, or at least, whether or not is was depends on who you are. And I suspect you prefer the winner to the so-called losers.

Let’s start with the basics. What is an IPO? It’s simple: a company sells a part of itself in exchange for cash. In the physical world, that’s the same as me making something and selling it to you. For the sake of this example, let’s say that I sell it to you for £1.

Blocking content from the Internet is getting a lot of press of late. The last couple of weeks has seen the Pirate Bay being blocked by a number of large ISPs and debate over whether the blocking of “adult” content should be opt-in or opt-out.

Unfortunately the enthusiasm to “protect the children” and “protect the copyright holders” seems to have pushed aside much of the debate of whether we should be doing this at all or whether it’s practical.

Instapaper

• The save page bookmark works with Google Reader. That is, it saves the link I’m reading rather than the Google Reader web page.
• Page turn. Rather than display the page as a long, scrollable single page, Instapaper paginates the document. You can “turn” the page much as you do in iBook or the Kindle app.
• Progress indicators. I like that it shows roughly how long a document is and how much has been read.
• Clean, minimal interface.
• The trick of reading the current page to make site like NYTimes (with page view restrictions) or LWN (pay walls) is a great idea but not completely reliable.
• Recent updates have been less stable. Going from day to night mode — an otherwise nice idea — almost always crashes. Putting the app into the background often loses the current location (it returns to the end of an archived article).

Pocket

You’ve probably seen that it’s the Sinclair Spectrum’s thirtieth birthday today. There are lots of great retrospectives — this is probably the best single source I read — so I’m not going to rehash all that. But I thought it might be worth a few words of my own.

Like many Brits my age, the Spectrum was my first computer. Technically it was the family computer, but after a few weeks I was pretty much the only one who used it.