iPhone lock screen tip: audio controls vs large clock, timer

▼ After six years of using one, it's not often that I stumble upon an iPhone trick I didn't know before. But here's one. When looking at the lock screen when audio is playing, press the home button and the audio controls are replaced with the large clock that the lock screen normally shows when no audio is playing.

This is the lock screen when playing music:

The time can be hard to make out on this screen when on the move. So press the home button and voilà:

But it gets better. A while ago I noticed that if you have a timer running, the lock screen will show you the timer. Unfortunately, not when playing back audio. Again, pressing the home button fixes this:

Not a big thing, but very useful!

Permalink - posted 2014-08-27

Existing and upcoming iOS device screens and the metric system

▼ Have you ever noticed how the iPad has strange screen sizes? 9.7 and 7.9 inches. The same for the rumored new iPhone sizes: 4.7 and 5.5 inches. Turns out some of these screen sizes are nice, round numbers... in the metric system.

First a short metric system refresher for my American readers. It all begins with the meter (m). Long distances are measured in kilometers (1 km = 1000 m). Short distances are measured in centimeters (100 cm = 1 m) or millimeters (1000 mm = 1 m, 10 mm = 1 cm). A liter (l) is a volume the size of 10 by 10 by 10 cm, and a liter worth of water weighs 1000 grams, or a kilogram (kg, also just "kilo" in common parlance). The main thing you have to remember is that an inch is 2.54 cm or 25.4 mm.

Interestingly, on its English language web pages, Apple dutifully lists all the outward dimensions of the iPad Air both in inches/pounds and (tens of!) millimeters and grams. In other languages, only millimeters/grams are mentioned. Except for the screen. That's 9.7 inches, period. Even in French. The same thing for the iPad mini with its 7.9" screen.

Let's do some calculations:

	Screen diagonal
iPhone 4	3.5" x 2.54 =	8.89 cm
iPhone 5	4" x 2.54 =	10.16 cm
iPad Air	9.7" x 2.54 =	24.64 cm
iPad mini	7.9" x 2.54 =	20.07 cm
iPhone 6 small	4.7" x 2.54 =	11.94 cm
iPhone 6 big	5.5" x 2.54 =	13.97 cm

Not so round. However, if we also take into consideration the pixel resolution and pixels per inch numbers that Apple publishes, things look slightly different:

	Resolution	PPI	Screen in	D in	px/cm	Screen cm	D cm
iPhone 4	960x640	326	2.95x1.96	3.54	128	7.5x5	9
iPhone 5	1136x640	326	3.48x1.96	4	128	8.88x5	10.19
iPad Air	2048x1536	264	7.76x5.82	9.69	104	19.69x14.77	24.62
iPad mini	2048x1536	326	6.28x4.71	7.85	128	16 x 12	20

(Screen in / Screen cm: screen height x width in inches / cm. D = screen diagonal.)

Conclusion: the iPhone and iPad mini use a pixel density that makes for nice round numbers for the display size in the metric system, with the original iPad being the odd man out. So what about the rumored 4.7" and 5.5" sizes for the iPhone 6? That would be 11.938 and 13.97 cm, respectively. Which probably means it's going to be 12 and 14 cm, or 4.72" and 5.51".

John Gruber's conjecture lands at 750 x 1334 for the small one. If that one has a 12 cm screen at 326 PPI = 128 pixels/cm, that comes out to:

	Resolution	PPI	Screen in	D in	px/cm	Screen cm	D cm
iPhone 6 small	1336 x 752 *	326	4.11x2.31	4.72	128	10.46x5.88	12

Note that this is different from the 1366 x 768 result I got last week. I then used 10 cm for the iPhone 5 screen size, and assumed 4" → 4.7" actually meant 10 → 12 cm, a 20% increase. But the iPhone 5 screen is actually 10.2 cm, so a 20% increase in size would be 10.2 → 12.24 cm, which is 4.82" and not in the 4.65" - 4.74" range that would be rounded to 4.7". I think if Apple had wanted to stick with 326 PPI / 128 pixels/cm, they'd have gone for the extra 2.4 mm diagonal screen size, which only adds only 1.2 mm to the width of the screen but makes the pixel numbers work out much better.

I still think 1280 x 720 is the most likely resolution for a 12 cm iPhone 6, because it's a nice round number and allows for slightly bigger text for unupdated applications while still providing a reasonable number of extra pixels. Assuming the 14 cm version would use the same pixel density, that comes out to:

	Resolution	PPI	Screen in	D in	px/cm	Screen cm	D cm
iPhone 6 small	1280x720	311	4.11x2.31	4.72	122	10.46x5.88	12
iPhone 6 big	1488x840 *	311	4.8x2.7	5.51	122	12.2x6.86	14

But we'll know soon enough.

* Rounded a bit to a number divisible by a power of two.

Permalink - posted 2014-08-26

Was the iPad a fad?

▼ Many people's first take on the iPad was that "it's just a big iPod touch". And so it is, really. But sentiments changed quickly as sales numbers skyrocketed: the king (the computer) is dead, long live the new king (the iPad). But then iPad sales numbers went down for two consecutive quarters. While Mac sales were up.

There are of course many possible explanations: iPads aren't upgraded biennially¹ like phones, but rather every three years or longer. Apple's prices are too high. Competition from cheap Android tablets.

Software on the iPad doesn't seem to do very well, either, which has its own issues, but I think the real reason for lack of both hard- and software sales is that the iPad simply isn't as useful to as many people as industry watchers thought.

Although I'm pretty deep inside the Apple eco system, having bought six Apple laptops and three iPhones (one of each every two years), I never got an iPad. The laptop can do everything, the phone is with me 24 hours a day. Do I really want to spend money on a third device that occupies middle ground? My answer: no. Especially not as long as Apple limits what kind of software gets to run on the iPad. On a phone that makes some sense, as it has a tiny battery and the phone function needs to work reliably. But not on the iPad, which is for all intents and purposes a general purpose computer that's rarely far away from a power outlet for long.

The way I see it, the iPad has three main use cases for consumers:

1. Early adopters. Why sit on the couch with a big laptop or a small phone when you can have a third device that's perfect for that particular use case?
2. Young kids. The touch interface and the size of the device is perfect for them.
3. Reluctant computer users. No file system, simplified OS and user interface, but they still get to browse the web, send the occasional email and the like.

The trouble with the first group is that there are only so many people who are willing to spend the money for something that is just a little bit better for some uses than something they already have. The same thing for kids: kids tend to break stuff, and iPads aren't cheap. So unless/until the price comes down, or maybe until Apple introduces a more rugged model, the main market for iPads has to be people who prefer the simplicity of an iPad over the complexity of a computer.

I just don't think this group is as big as many people seem to think. My mother was around 50 when she got her first computer. I was surprised at how well she managed to use it. That was more than a decade ago, when things like networking and managing photos and music were much harder than they are today. Most people under 60 manage just fine with "real" computers, and aren't going to give up useful features for the simplicity of an iPad.

And if iPads can't displace real computers, they're going to remain a third device, which only does a few things better than a laptop or a smartphone, but adding the hassle of another device to manage and charge, as well as the complexity of syncing data between devices. Sure, iCloud is supposed to take care of that, but only if you're 100% in the Apple ecosystem and don't mind having your data on remote servers. And that's when everything works the way it's supposed to.

I believe the early sales numbers of the iPad were largely fad-fueled. The fad seems to be over now. I'm sure tablet-like devices are here to stay, but so are regular computes. The next clash will be when ballooning smartphone screen sizes and shrinking tablet sizes meet in the middle. However, don't be deceived by "5.5 inch" iPhones vs "7 inch" (actually 7.9") iPads. The new extra big iPhone would have a 12.4 x 7 cm screen, while the iPad mini has a 16 x 12 cm screen. So the iPad mini still has more than twice the screen area as a 5.5" iPhone.

¹ Originally I wrote "semi-anually", but it was brought to my attention that the word is spelled "semiannually" (I know I shouldn't trust the spell checker!) and it actually means twice a year. The correct term for every other year is biennially, not to be confused with biannually, which again means twice a year.

Permalink - posted 2014-08-25

Apple announces iPhone 5 battery replacement program

▼ That was fast. No sooner had I complained about my iPhone 5 battery:

When I got my iPhone 5, I did a bunch of battery tests, and at that point, the battery life was pretty much identical to that of my iPhone 4, which was two years old by then. However, pretty soon I started having issues where the phone would shut down if I tried to do too much at the same time if the battery was below 50%, especially in cold weather. (Taking a photo would typically do it, as that fires up the GPS which in turn causes cellular data traffic.) It took me a while to figure out that five minutes later, I could turn the phone back on. These days, I have to be very careful with the way I use my iPhone in order to make it last through the day on a single charge.

...or Apple announces the iPhone 5 Battery Replacement Program!

The program only applies to certain iPhone 5s (as in: multiple of iPhone 5) sold until January 2013. You fill in your serial number and then you're told whether your iPhone qualifies. And mine does, which is great news. So now I have to bring it in to the brand new Apple Store here in The Hague to have the battery replaced. Actually, when I was there for the opening two weeks ago, I had them check my battery, but it was still freshly charged and showed a capacity of just under 80%. They would have replaced it under warranty, but as the phone is almost two years old and I didn't get Apple Care, I'd have to pay about € 110, which is too steep if I end up buying a new iPhone later this year.

I wonder about the replacement process: will they replace the battery in the back? Ship it somewhere else? If so, how long will that take? Or will they simply replace the phone with a new one? If so, really new, or refurbished, with possibly some wear on the outside?

The program goes into effect on Friday outside the US and China, so I think I'll bring the phone in a week from Monday and then I'll find out. I'm doing a "only play audio until the battery dies" test today to compare pre and post replacement battery life.

Permalink - posted 2014-08-23

Photographing fireworks remains tricky business

▼ Tonight is the third night of the Scheveningen International Fireworks Festival! Hopefully the rain will be done by then. Photographing fireworks remains tricky business, though.

Last week, I used my trusty Nikon D7100 with the 18-55 mm kit lens. The zoom range is fairly suitable here, and it has image stabilization, so I was able to get reasonably sharp photos at 1/8th of a second hand-held. However, they're not quite as sharp as I hoped, so maybe if the weather is good tonight I'm going to take a tripod, so I can use even longer shutter times to get more of the streaming effect.

It could be that a lot of the movement in the fireworks in caused by the wind blowing the fireworks away, though. A tripod isn't going to help against that.

I set up the camera for "back button focus", so I had more control over the autofocus. Back button focus means programming the AE-L/AF-L button for "AF-ON". With this setting, pressing the shutter doesn't make autofocus happen, you need to press the AE-L/AF-L button for that. This way, there's no autofocus delay when shooting, which is useful with fireworks, because the autofocus system can't always get a good focus lock on it. But with cheap zoom lenses it's important to refocus after zooming, because the focus drifts when zooming. A quick press of the AE-L/AF-L button while pointing the camera at a distant light takes care of that.

I set the aperture and shutter speed manually, but used auto ISO so the camera would adjust the ISO to match the brightness of the fireworks. I experimented with -0.7 to -2 exposure compensation, and -1.3 seemed to work the best.

Permalink - posted 2014-08-22