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It's a nice idea, and seems well executed. To be honest, and I hope this isn't too much of a downer:

a) I probably won't pay to evaluate it. It seems like the kind of app that would be perfect for a cut-down trial version.

b) I wonder how many people - especially this audience - really care about what's on their desktop. I know I barely ever see mine, because I run all windows maximised (or tiled). It's nice to have a good looking image for the brief period of startup/shutdown time during which I can actually see it, and I plump for the Mountain Lion-era space image because I think it's a lot more attractive than the recent mavericks/yosemite equivalents. But anything more, in my book, is overkill.

A trial version is a great idea. I didn't want to split my time too much, but maybe I'll release a free version with a limited range of artists (the all van Gogh, all the time app?).

How many people care about art on their desktop? I don't know either! Seeing more art can only be a good thing. It's a discovery tool for me. I've chanced my Mission Control preferences so I can quickly show the desktop by moving my mouse cursor to the lower left hot corner of my screen.

I kind of take some time to time to see online arts, just for curiosity. Definitely would like to give a go with the free app with van Gogh. Not sure I would like to pay though, for financial reasons. Great idea though.
"wonder how many people - especially this audience - really care about what's on their desktop."

I do. The duller, the better. Uniform gray is my preferred background (not too bright red on production systems or when logged in as administrator).

Pictures I liked had 'dull' parts in regions where icons tend to show up. An option to reduce (color) contrast would be a nice feature, especially if it were to have some smarts depending on the picture and what icons are on the desktop.

There actually is an option to "dim" the image; it applies a black overlay over the image of selectable opacity.
Have you seen the Android wallpaper app Muzei [0] ? It dims and blurs the image, and launching the app or double tapping the wallpaper itself brightens and focuses the picture momentarily. No idea if that is possible on OS X though.

[0] https://play.google.com/store/apps/details?id=net.nurik.roma...

Difficult to implement something like that on OSX without a resource-intensive overlay. As it is, Artful takes advantage of the built-in NSWorkspace API to change the wallpaper, which only causes activity on download and change of the image.
Perhaps you could pre-render a blurred version to a new image, and switch to the focusing animation just when needed? Granted, that may have flicker.
Pfffff don't listen to old grumpy HN. Awesome app, just bought it. I like art and can't bother finding nice wallpapers for my desktop.
Sorry, I was aware my comment might come across as too negative, but still thought it might offer useful feedback and a kicking-off point for conversation. I agree that a whole slew of "this is crap" posts is the last thing anyone wants, and I would never post something consisting solely of that, but a series of "this is great" posts is almost as worthless.
Usually I bemoan grumpy old HN as well. However, this app is buggy, unstable, and in fact doesn't work. And it is being sold for $5.
I get "The item you've requested is not currently available in the U.S. store." when I try to buy it.

edit: Resolved!

Great app, great work. I like anything that can automate beauty into my workspace.
Definitely needs option too offline cache and not use the net connection, I do not want to have my cable trickle saturated by downloading hi-res images indefinitely in the background!
How much art would you be comfortable caching locally? The full collection is over 30GB.
Assuming someone changes the image every 5 minutes, you'd cover 12/hour or 288/day. Would maintaining a FIFO queue of one day's worth of images be crazy big? I think it's reasonable to expect a person's computer to have internet access once a day to refill the queue.
Make it configurable? But I'd probably suggest a default somewhere around the 1GB mark - Apple are still selling machines with as little as ~120GB storage.
Nice app, would be great if it worked better with multiple monitors in different orientations though!

Landscape images resized to fit screens in portrait orientation look really bad.

That's a great point! My test monitors don't rotate, but I used to have a config like that. I'll add orientation preferences to a future version!

If you have a mixed set of monitor orientations, would you prefer to have a different art piece on each one, suited to the respective orientation, or a piece that tries to fit both (restricting the art to near-square works)?

Different pictures on each monitor should be the default. The premise is you want to expose users to more art!
Fair enough! I'll have to think about how that would change the interaction with the main menu.
This is my first app on the Mac App store, and my first Swift app. It was something to scratch my own itch. I wanted to be exposed to more art and knew that the best way was to have it right in front of me on the computer, so I collected public domain art and made an app to periodically display a random work as the wallpaper. So far my favorite artist discovered this way is Giovanni Battista Piranesi, for his etchings of Rome. My girlfriend describes the app as "Pandora for art." Once there are enough users, I have plans to roll out a collaborative filtering system. (Slope one-based? Tips there would be great)

I'm interested in hearing about the experience others have had with the Mac app store. I've been giving away promo codes, and that seems to have helped sales by word-of-mouth. Although the app appeared on the daily "Top Paid" and "Top Grossing" chart for its category, that happened with only low double-digit purchase counts. It seems there are fewer people using Mac app store than the iOS store.

Feedback is welcome, and I still have a few free codes left if anyone would like to try it without buying. I set the price point at $5 because it covers my costs (AWS mostly), it's less than an art museum admission, and it is about the same as a Starbucks coffee (hopefully within impulse range for many).

Oh yes, please send a code to alandarev _at_ gmail.com :)

Once for having no other option, I glued together RSS feeds + deviant arts + rotate background from a folder... It worked quite well, but some unfiltered deviant art publications were upsetting me, plus a painful maintenance...

It looks pretty cool, if you still have any promotional codes I'd love one.

As a random suggestion I feel like if your 'WHY' is something like to "effortlessly inspire with great art during normal computer use" rather than just focussing on an app that changes your desktop background. I like your collaborative filtering idea, and if you're taking feature requests a screensaver/multiplatform port would be nice (e.g. if every time I open my phone the lockscreen background is a different work of art its a pretty effortless way to get more exposure) ;)

Thanks for the suggestion on copy. Please email me for a code (info is in my HN profile).

I'll have to learn more about what it would take to make a screensaver. Unfortunately the iOS APIs do not seem to expose any programmatic way to change the background or lock screen (I'd love it on my phone too!).

I was about to ask the same feature.

I did something similar as a screensaver for the Mac, but it's some hack based on Webkit, it's stored locally and the range of artists is more limited.

I'd love if Apple allowed this in iOS, but I'm not holding my breath

Great job, btw

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Do you cache art locally once you've used it, for cases when I might not want to download new backgrounds (such as when tethered)?

If not, might I make it a feature request?

It is not currently caching, because the collection is so large (30+GB) that it would be difficult to distribute in its entirety, and since items are unlikely to repeat if all filters are off. I'll have to think about adding local caching for the case when filters are selected. For now, I'd suggest pausing it while tethering (Anyone have suggestions for detecting tethering from the Mac side?).
Once you have tether detection you could create a favoriting feature, and locally cache those.
Best Practices for Developing Cellular Apps:

https://developer.apple.com/library/ios/documentation/Perfor...

Each of the network interfaces have different identifiers and you can get info about them.

Also maybe helpful, many of the apple BSD utilities have a `-C` and `-E` options to prevent binding to a cellular or "expensive" interfaces. For example, `netcat` has this, and is open sourced (part of Darwin), so you can poke around and see how they do it.

http://www.opensource.apple.com/source/netcat/netcat-22/netc...

(By the way, just bought the app - happy to pay $5 for this.. Good luck!)

In case you do decide you want to provide the option of downloading the whole thing, I would suggest bittorrent as the right tool for the job (basically it would avoid you having to pay most of the bandwidth cost).
I'd like to try the App. If you have codes left, please consider sending one to schmooser _at_ gmail.com
Sent!
If you have anymore promo codes I'd like to try the app! xivusr[at]gmail[dot]com
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I'd love a promo code if they're still going (fareeddudhia@gmail.com)! The app looks great.
Sent! (to others: please email me so I can keep track of the code requests and so that the comment section stays on-topic; email address in profile)
I've been thinking about whipping up a Swift App, but I haven't found many online resources on how to do one for OS X. I tried following an ObjC guide and translating it all to Swift, but my lack of experience really slowed me down.

Did you come across any good guides for making Swift Apps in OS X?

I came to it as a mostly Python/embedded C/C++ developer, and learned by translating ObjC examples to Swift. The Apple docs are pretty good, and for anything I couldn't find in the docs I searched for an ObjC example, often on StackOverflow. The most difficult part for me was working around the sandboxing restrictions, particularly for starting an app on login (after trying different approaches I learned that it requires a secondary helper app and a simple call to SMLoginItemSetEnabled() ).
Just downloaded it. I have 3 monitors and having different art on each would be a great feature.
Or the same piece split across them, for large horizontal pieces.
Support for triptychs?
I had never heard that term before, but yes, that's exactly what I mean.
Just downloaded it. I have 3 monitors and having different art on each would be a great feature.
Also, a "Safe for Work" mode would be great.

I know it's art but everyone else just sees nudity.

Fair enough. There are a lot of nudes in art history though (and depictions of Jesus), especially among public domain works. To be comprehensive, I'd have to go through and manually tag as nude/non-nude, which I have not yet done. Something for the future, perhaps when collaborative filtering gets rolled in. For now, you can try selecting everything but "nude painting" from the Genres list. That may help. Alternatively, maybe select an artist known to be "safer".
This might be a good use of Amazon Mechanical Turk. It will need to be manually done by humans but you can do it at a very cheap rate by crowd sourcing it.
Love the app and gladly paid the full price. Only downside for me so far is the image quality -- most look ok, but many look bad with really low resolutions, even on my non-retina MBA.
you know whats cool.. if you can order the art from within the wallpaper.. that is a million dollar idea i think...
This is great! Purchased. :)
I would love to try it if possible. It looks awesome!
I would love a code.

Where are you pulling the art work from? Are you hosting the art on your own AWS account or pulling from some sort of art project guetenburg?

Really a nice, educational idea.

Just bought it and stumbled over a minor thing: UTF8 support for the artists name would be great (e.g. Albrecht Durer -> Albrecht Dürer).

Yeah, unicode with NSTableViews is tricky. To be fixed!
Congrats dude! I don't exactly have a use case myself (I'm a photographer), but I like it conceptually!
Looks cool, I'd love a code as well :) assink [ at ] gmail
Update: All promo codes have now been given away. Thank you for the interest!

Also, MANY THANKS to those who have reported bugs! In my small test group things were working fine, but as with any manufactured good, once you have enough instances of something problems appear at so many sigma. I am investigating the bugs and working to fix them. Thank you for your support and patience. As a solo dev it really means a lot. I am also working to improve filter selection and am tidying up the UI a bit.

Agree with dingdingdang to have some caching, or some core set of wallpapers or something.

Also seems to be bugged when clicking the "Next artwork" menu item - keeps on showing the same image every other time, although the title does change to something random.

Agree with dingdingdang to have some caching, or some core set of wallpapers or something.

Also seems to be bugged when clicking the "Next artwork" menu item - keeps on showing the same image every other time, although the title does change to something random.

The repeat seems to be a OSX/Yosemite bug that some have seen, and is often fixed by a reboot. If you open the display preferences does the thumbnail change correctly?
Firstly, nice job!

Second, I'm seeing this bug and yes, in the Desktop & Screen Saver settings, the thumbnail is correct (you can see what it should be by opening the menu bar dropdown and clicking the title of the piece which will open it in the browser straight from s3).

Edit: tried reboot, the app tried to autostart but crashed. Started it manually, it kept crashing a few times. It is now running but still showing a particular image on every other change, even automatic.

I have submitted an update to Apple, currently pending approval. Hopefully it will be available on the App Store soon and fix the issues you're seeing.

It's interesting that no matter how much one tests, bugs invariably appear for some percentage of users, given the configuration of the software and the environment of the machine. I liken it to manufacturing defects that present at so many sigma. It's because of feedback from users like you that things get better, so thanks for taking the time to comment!

Great app! Please add the option to add the artist and title of the work to the desktop somewhere in the corner, perhaps even with a link, so that we may learn a little about the work itself also.

Edit : I see you already do this in the menubar. :)

Thanks for the feedback--added to my feature ToDos. I didn't include artist text already because I did not want to overlay anything that would get in the way of the art, but enough people have requested it that it is something I'm planning to add as an option. For now, the artist name is available in the menu bar drop down, and it opens the wikipedia page for the artist (and clicking the name of the work opens the URL to the image file). Optionally, turning on notifications will also show the artist name.
I know its random and not cheap enough with current tech, but wall hanging tablets/digital photo-frames that present an ever changing (and possibly sync'd) set of art in the same style as a museum would be seriously awesome. Needs a lot of screen estate to have title underneath. E.g. a bit like http://www.artofwildlife.com/Miniature_Paintings_Exhibition3...
I also do embedded systems, so that's something to think about. :)
hum.. imagine if you develop apps for the Apple tv.. that would be seriously awesome.
Off-topic, but the site gets all wonky when trying to zoom in/out/reset with ff34.. looks like it's the backstretch jquery plugin causing it.
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cool. Out of curiosity, where do you get the art from?
If you mean where the image files come from, they're hosted at https://s3.amazonaws.com/artful-collection. Using Chrome will just give the xml structure of the bucket, but you could parse and browse yourself with that much.
no, I meant where did you take the images in the first place. I had a thought in the past of making an app that used classic art in some way, and IIRC I found that http://www.artchive.com/ lets you use their art collection for commercial purposes, while the Google Art project https://www.google.com/culturalinstitute/project/art-project doesn't.

I think that even if the original art has no copyright restrictions, the reproductions of it can have some.

Nope, nope, nope. Reproductions can never have their own copyright. Really: No matter how much work someone does in tracking down and scanning public domain art, the "work" in question is still in the public domain. Only authors get copyrights, not "sweat of the brow" labor.

You can get a copyright in any creative changes or additions you make to a public domain artwork--the things that you are the author of.

It is sometimes a violation of Internet norms to fail to give credit to someone who has originally scanned something, but this is not copyright.

Nice app - saves the hassle looking for hi-res art.

Would love the ability to add a folder of my own images, to mix it up a bit.

A local folder in the mix would be an interesting addition. I've included it in the development ToDos/wishlist.
Like the concept here. Would love a trial version, though.

Slightly off-topic, but this reminds me of what Electric Objects are trying to achieve: essentially, this same app, but hanging on your wall. The future of art consumption for the masses.

So, just purchased this. Very nice. Would like an option to change the art once every 12 or 24 hours, if possible?
Changing the update frequency options is planned for a future update.
I'm going to try it now. Who cares if it's 5 bucks if I get some value out of it.

Will you be looking into tying this in with a screensaver? It would awesome for the office if it can pull up art into a screensaver.

I've long been a fan of having artwork as my wallpaper, and finding nice ones has always been a hassle. Just bought it. Thanks!
This made my day. Happy to pay 5 bones for it.

I'd love to see intelligent support for multiple monitors, and perhaps a nice way to avoid such black bars around the portrait-dimension pieces.

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Thanks for the purchase! Better multi-monitor support is on the agenda. You can eliminate the pillarboxed art/black bars by selecting "Zoom in to art to fill screen" at some sacrifice of resolution. There's also an option to prefer landscape-orientation artwork, which is really a filter to only select art with a width:height ratio of >1.3.
I purchases as well, and then I found out it doesn't support multi-screens very well. I want different art on each monitor:) Good job!
I bought it too (and congrats, it's a great start!), but probably won't use it until you add multiple-images-on-multiple-monitors.
Would be nice to have an option for different art pieces on different spaces as well. For example, I use 4 spaces on my primary display and 1 space on the external one and I'd be delighted if I had 5 different art pieces shown.
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Out of curiosity, and by no means feel you have to share if it compromises your product, how did you source the pieces? Did you have an idea of what genres and artists you wanted already or did a somewhat comprehensive library already exist someplace and you filled in some gaps?
I know it's art, but I'm having trouble explaining "Torso of Venus" to my coworkers... :)
I think its at a higher price point for me to try. Regarding the recommendation engine I did suggest to start collecting some information about your users and their likes/dislikes with artist. Till then I believe item based recommender might do better for you. I am a data engineer, pm me for any help with rec sys. ATB