I have a few apps for Android. First few days you always get a lot of downloads (depending on what your app does). That was one year ago. I released another app a few weeks ago and the market has changed. Now, it's much more like the iPhone market where you fall into oblivion if you don't have some marketing strategy. Take a look at the 'just in' for all apps. It's filled with batches of 'hot babes' apps and skins apps so you fall down the list very quickly before anyone even has a chance to notice you.

I released a 'Sca', a spy camera app, a year ago and it's doing pretty well. Made $6,000 in 14 months. With the release of all the new phones this year, revenue has picked up to where I consistently get $30 per day after Google takes its cut. I tried $2.95, $9.95, and I settled on the current $5.95. Revenue is constant across all price points. There's no way to scoop up all price points, though, which is annoying. Anyone have any ideas for that?

Last I checked, you get bumped back to the top of the 'just in' list if you submit an update and it's been a few weeks since your last update, so it's a good way to spike up traffic.

I released a niche app for astronomy, Iridium Flares, that sells for $1.45 and makes one sale every few days.

I made sure my two paid apps have a free version. I have a few free apps that advertise my paid apps.

If you compare the top paid apps with the top paid games, it looks like there are more successful games than successful apps. People will pay for entertainment, but games usually require many more hours of work.

I currently have two apps on the iTunes App Store, Farmville Timer http://itunes.apple.com/us/app/farmville-timer/id360432188?m... and Cafe World Timer http://itunes.apple.com/us/app/cafe-world-timer/id365160796?...

These are relatively simple utilities with push notifications for tracking various events in those Facebook games.

Both of them are priced at $2.99 and sell between 10 and 20 copies a day on average, netting me about $60 a day or $1800 a month. They've been on sale for two months now.

You can see my blog at http://blog.tuchee.com for greater detail about my pricing experiments and experiences in developing the apps.

A few more observations: I kept detailed stats on the download patterns for my paid spy camera app. The rate of downloads is constant between 8am and 2am. I did not see any 'rush hour' effect. It's also constant but slower at night, between 2am and 8am. Given that sales come from all over the world, that would tend to flatten any bumps in the graph. I'm not sure what time zone Google is using for these stats.

More interestingly, weekends see up to two times the traffic, so I release my updates Saturday morning so they can have the most possible traffic through the 'just in' list.

Or Apple App Store revenues too, if you're willing.

My Android numbers are similar, close to $1k after 2 months, now averaging around $10/day. It's been pretty constant for a while, I suspect the natural decline over time is countered by more users picking up recently released phones like the Incredible and Desire.

I have a few iPhone apps in the store. All together they average around $8 a day. Was a lot more back when I released them Oct 2008.

perhaps a link to your app or a snippet about it?

Also we could put this up in a spreadsheet. That would be helpful in looking clearly at the avg sales by category of apps (games, business, etc)

P.S: I'm planning to develop an Android app too.

Well I'd say normal probably depends entirely on what type of application you wrote, and whether it's a paid app or ad supported.

first 5 days $2K per day (iPhone application) - education

On Apple store about 3k/mo (most of those from medical) with a bunch of little apps.

Browsing the Android market, especially in the top paid application section I have not seen any application particularly worthy of me purchasing it. Could you give me examples of any apps actually worth buying?

I'm also interested in Mac app revenue. Anyone willing to share?