Oz Weather Apponomics – Birthday Edition

This is the latest installment tracking the progress of the Oz Weather iPhone app in the iTunes app store. (Part 7 installment here.)

Oz Weather v1.0 arrived in the app store on 1st November 2008 (now at v1.7.1), so I now have a full years of stats to share with you.

  • Total paid app downloads: 64,500 (176 per day on average)
  • Net app revenue: AUD$99,600 (US$89,700) – net of 30% Apple share and 10% Australian GST
  • Average User Rating: 4 stars – from 1187 ratings of all versions
  • Average ranking: 17.5 – in Australian app store

[Stop Press – AUD$100k sales were reached on 3rd Nov 2009]

The following graph shows a complete history of one year’s worth of daily sales records.


The associated Australian overall paid apps ranking is as follows:


So there have been a number of peaks and troughs. The single biggest factor causing those peaks and troughs appears to have been Apple promotions in the Hot / New / Staff Pick lists. But this has worked both ways – the biggest troughs have occurred when Apple has promoted competing apps.

The second biggest factor has been the weather itself. In Australia it seems that people are more interested in summer weather than they are in winter weather, hence causing an underlying annual cycle which peaks in summer (Dec/Jan/Feb) and troughs in winter (Jun/Jul/Aug).

Some individual weather events (eg. extreme heat waves, major rainfall events) seem to account for much shorter term peaks – especially noticeable around Feb 2009 when a major app update was also released.

Its also worth noting that during the course of the year the number of competitors has grown substantially. No doubt other developers have noticed how well weather apps seem to do in the app store ecosystem, and I would guess that my blogging about such attractive sales figures has probably encouraged some of the new ones into the game too. 😉  However, most of the newer competitors have failed to get any significant visibility, at least so far, and overall I don’t regret my decision to be transparent and open with my sales figures. I am always delighted to read about the inside stories of other app developers’ successes and failures, and hope that my own story has been interesting and useful to others too.

Sun Seeker – What is it Good For?

There have been quite a few news and blog mentions of Sun Seeker since it’s release (described in this previous post), which has created some good interest in it, and yes, some good app sales too. But a common reaction of press reviewers seems to be to question what you would use it for. I have to say, frankly, that I am a little surprised. How could you not immediately understand how useful this app really is?!

SunSeeker for Real Estate

But then it dawned on me (whoops, no pun intended!). We are not all born the same. Some of us do seem to have that extra geek gene, which means that some things which seem really obvious to us are pretty much obscure to others. And vice-versa of course, as I know all too well, often to my own detriment. 😉

Thankfully, however, some of those who bought the app do already “get it”, and a few kind souls have left some great comments explaining exactly how they find it useful – and some of these are in ways that I had not even imagined myself. As these comments are spread around different countries’ app stores, I thought it might help to list a few of them here. I have added highlighting to various words and phrases to emphasize the types of usage people are using it for.

I bought this app to track the suns position on the cockpit window during my trips as an airline pilot, this app works better than I had hoped. I now use this app as a situational awareness tool, keeping track of possible solar glare on final approaches to particular runways. It works awsome in the virtual 3d view because of the slaved compass I can find the suns relative position with reference to any runway. This is really a great app. (Lwm5 – USA)

Fantastic – shows the true utility of augmented reality apps. As an architect I have been doing solar analysis of sites by printing solar charts, taking pictures and noting bearings & altitue of horizon (trees mnts structures etc) – then combining info in Photoshop. With this app it’s as easy as pointing the camera to get a sense of the solar access of a site at different times of day / year. (smh_iTunes – USA)

I work in the Solar industry and this works exceptionally well for aligning solar arrays and showing customers the path of the sun. GREAT app 🙂 (Clear James – Australia)

The perfect app for DOP’s Gaffers and anyone that needs to know where the sun path will be and where you will lose the sun behind a building etc. The augmented reality is flawless and helps anyone plan out a photo/film shoot to the hour. A steal at this price. (Metromadman – Australia)

It might also be worth noting that, currently, the best sales of this app are being made in… Japan. How fitting, given that it is sometimes know as the land of the rising sun!

Currently Sun Seeker is #6 in paid apps in the Navigation category, there. I’m guessing that this might have something to do with the fact that Japanese are known for being early and enthusiastic adopters of new technology. This helps in two ways – firstly because there might be a strong uptake of the latest 3GS iPhone model (required for this app), and secondly because the area of augmented reality is so new to the consumer space, and offers exciting new ways of using the technology, which may not be immediately obvious to those more reluctant to embrace unfamiliar technology.

Now why can’t Westerners be more like the Japanese?

So until next time – Konichiwa! 🙂

Estimated Total Value of App Store Market

AdMob has just issued a report with some very interesting data on the app store, and one of their claims is that the app store market is worth about US$200M per month.

This is disputed as being an unreasonably high estimate by some commentators. However, with data I have gathered from my own app sales, I am in a position to make my own estimate too. So what is it? Well there are four steps.

Step 1 – Sales Versus Rankings

In an earlier post I showed a graph of sales versus rankings for Oz Weather in the Australian app store during the first few months of 2009. Below is an updated graph covering the sales period July/August 2009.

Oz Weather Paid Rankings

Although Oz Weather hasn’t ranked highly enough to provide data points within the top 10, it does still allow a good estimate of the curve as a whole ie.

Daily Sales = 1800 * Ranking ^ -0.8

Note that this curve is substantially higher than the 6 month-old estimate, showing a large increase in the overall number of app sales per day – of the order of a factor of  2 or more.

Step 2 – Find area under the curve to give total daily app sales

The area under this curve is the integral of the curve formula. With some high-school calculus, we might know that this is:

Area under curve = 1800 * (Ranking^0.2 / 0.2)

Solving this for the range 0 to 50,000 apps (the approximate number of paid apps available) gives the result:

52,000 app sales per day in the Australian app store

Step 3 – Multiply by average app price

Assuming an average app price of US$1.80 (AUD$2.25) the total daily revenue for the Australian app store alone is

  • AUD$120k per day
  • AUD$3.6M per month
  • AUD $42.7M per year

Step 4 – Expand to whole Globe

I have previously estimated the Australian market to be about 1/30th of the global market size. However, the AdMob report indicates about 45M iPhone/iPod Touch devices worldwide, and previous research has implied about 1.1 million in Australia, implying a ratio of about 1/40. In that case, the corresponding global sales figures would be

  • US$3.9M per day
  • US$115M per month
  • US$1,370M per year


Although there are a number of estimates and assumptions involved in these calculations, the final monthly number of US$115M per month, although less than AdMob’s estimate, only differs by a factor of a 0.6.

A more accurate estimate would be possible with a wider range of app versus ranking data – especially from the larger app stores like the US. However, I did previously collate some data like this, and it also supported a rankings/sales tail off with a power factor close to -0.8.

I conclude that my own app’s sales figures imply that AdMob’s estimates are very plausible, and certainly likely to be in the correct ballpark.

Oz Weather Apponomics – Part 7

This is the latest installment tracking the progress of the Oz Weather iPhone app in the iTunes app store. (Part 6 installment here.)

The latest stats, to 4th August 2009:

* Total app downloads: 48,600
* Net app revenue: AUD$73,800 (US$59,000) – net of 30% Apple share and 10% Australian GST
* Average User Rating: 4 stars – from 885 ratings of all versions

The following graph shows a complete history of more than 8 months of daily sales records, since launch on Nov 1st 2008.


The associated Australian overall paid apps ranking is as follows:


I already explained the cause of the great sales dip in June in the previous post, but the other feature that stands out here is how the ranking in the latter half of the graph has been declining despite a fairly constant average base level of sales (excepting June). The obvious explanation for this divergence is that the total number of all apps being bought is gradually increasing with time as the number of iPhones/iPods in Australia has increased. Recent estimates by AdMob put the total number of iPhones in Australia at around 750,000 and iPod Touch at 350,000 – making a combined total of 1.1 million devices on which Oz Weather could be installed. This would mean that Oz Weather has been purchased by about 4.4% of Australian device owners.

This might seem to leave room for plenty more sales, but others have suggested that 3% is a high ownership rate for other popular apps such as “Flight Control”, so maybe we’re already pushing the boundaries!

App Store Turns 1

The app store just turned one year old! And to celebrate, Apple have added a little promo page to iTunes, which you can find via this link on the iTunes store front page.

iTunes Menu

And here is part of their colorful celebratory page, created with Apple’s usual great design flair.

App Store Turns 1

Apple have “gathered together some of our favourite games and apps“, and to my delight, Oz Weather is one of the 32 apps they have chosen to feature in their apps list – appearing there in 10th spot.

iTunes Turns 1 Apps

What caused me to discover this? Today’s sales jumped up by 40%. Although sales can be quite variable day to day, this change seemed to be a bit bigger than usual, and I wondered if there was some material cause. Having been tipped off, it didn’t take long to find it. 🙂

As usual I will be watching carefully to see whether this has an extended effect on sales levels, and report back in due course.

Amendment 20th July – it has been pointed out to me that this 1st birthday page had been in iTunes for a week already. So I can’t attribute the sales jump to this after all. Looks like I’m getting a bit lax in my iTunes monitoring!

Oz Weather Apponomics – Part 6

This is the latest installment tracking the progress of the Oz Weather iPhone app in the iTunes app store. (Part 5 installment here.)

The latest stats, to 3rd July 2009:

* Total app downloads: 44,800
* Net app revenue: AUD$68,000 (US$54,400) – net of 30% Apple share and 10% Australian GST
* Average User Rating: 4.5 stars – from 6 ratings of latest version, 4 stars – from 790 ratings of all versions

The following graph shows a complete history of more than 7 months of daily sales records, since launch on Nov 1st 2008.


The associated Australian overall paid apps ranking is as follows:


The most immediately noticeable feature of these graphs is the big “crash” in sales and rankings starting at the beginning of June, and then the sudden recovery on 26th June. What could have caused these big changes in fortune?

  • The Fall – At the beginning of June, Oz Weather’s main head-to-head competitor (Pocket Weather AU) was given “Staff Favourite” status in the Australian app store, which meant that it appeared on the front page of the app store with that endorsement. So at the same time that Oz Weather sales and rankings tanked, Pocket Weather sales and rankings  took off. While Oz Weather reached its nadir at 68th ranking, Pocket Weather peaked at around 29th ranking.
  • The Recovery – On 26th June, Apple launched the iPhone 3GS in Australia. Oz Weather sales tripled overnight and its ranking jumped from 60th to 20th, while Pocket Weather’s ranking remained much steadier, hovering around the 40th to 50th ranking range. My surmise as to what caused this is Apple’s in-shop promotions which include Oz Weather as one of the featured apps, and a demo version is pre-installed on some of their iPhone shop demo units. This means that new iPhone customers who visit an Apple store to make their purchase get well exposed to Oz Weather.

Interestingly, the cause of both the fall and the recovery are apparently Apple’s own promotional mechanisms, over which individual developers have (as far as I am aware) absolutely no control. Either you are picked or you are not!

Overall, of course, Apple’s influence has been much more of a benefit than a hindrance to Oz Weather, and I am of course very grateful for that. And I certainly do not begrudge the fact the Pocket Weather was given a staff favourite pick by Apple. Like me, they’ve put a lot of time and effort into their app, and deserve their day in the sun as much as anyone else.

Oz Weather Apponomics – Part 4

This post provides an update to the progress of Oz Weather in the Australian app store.

First, here are some of the most recent milestones, highlights and points of interest.

  • Total app downloads: 34,800
  • Net app revenue: AUD$52,500 (US$37,000)
  • Highest paid app ranking: #1 (for 12 consecutive days)
  • Lowest paid app ranking: #17 (excluding app store technical glitch)
  • Average paid app ranking: #6 (over app lifetime)
  • Upgrade uptake half-life: 5 days (average time for 50% of existing users to update to new versions)
  • Total weather queries served: 3.8 million
  • Split between iPhone / iPod Touch user base: 89% / 11%

And here is the complete history of daily sales to date (ie. from 1st November 2008 to end of first week of April 2009).

Oz Weather Sales

I have listed some probable causes for some of the ups and downs in my previous posts, but the newest “feature” here is what looks like a downward trend since the peaks of early February, although the last 20 days or so could be showing a leveling off – perhaps to some kind of base sales level around 100 to 150 sales per day. This is lower than the figure of 150 to 200 I had suggested in an earlier post, but the correlation between daily sales and weather queries per day seems to have become even clearer, as evidenced by the following updated graph.

Weather vs Sales

If you compare this graph with the earlier version from a month ago, you will see that the more recent, lower level of daily sales on the leftmost part of the graph correlate well with decreased level of app usage by existing customers – which was down to about 0.75 queries per day per app in some cases.

This suggests two possibilities to me

  • Long term users may be experiencing app fatigue, overload or dilution, and are no longer using older apps as much as they used to.
  • During this inter-seasonal period with less weather extremes, the weather is of less interest to people in general, and hence existing app owners use the app less, and new iPhone owners are less likely to want to buy a copy.

It is worth noting that sales of other Australian weather apps appear to have experienced broadly similar trends to those of Oz Weather, as evidenced by their rankings which have broadly followed the movements of Oz Weather’s own rankings. Therefore it seems that competitive factors are not a significant factor here.

Based on the evidence to hand, I suspect that the issue of less interesting weather is the most significant one. If this is indeed so, then sales can be expected to increase again when bouts of extreme winter weather start to hit Australia.

So that is my hypothesis, and I will report back later with further data which may support or refute it.