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DEVONsphere Express makes your Mac smarter. Be more productive by letting DEVONsphere Express keep track of related emails, articles on the same subject, or similar Web pages. Discover the hidden connection between seemingly unrelated files.
  • Find other items related to what you're working on
  • Search like with Spotlight on steroids
  • Context-aware, always focuses on what you do
  • Runs as a menu extra, always available

What's New

Version 1.7:

Note: Indexing of Apple Mail messages (.emlx) is currently not working on OS X 10.9 Mavericks due to an incompatibility of Apple's Spotlight metadata importer plugin.


  • New category Folders.
  • Support for OS X 10.9 Mavericks Finder tags and comments.
  • Folder "~/Library/Messages/Archive" is automatically indexed if more...


OS X 10.6.8 or later

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DEVONsphere Express User Discussion

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ChristopherPrice Member IconComment+105

App Store version stuck at v1.5 due (apparently) to sandboxing restrictions. However, if you download and install the latest version from DEVON Technologies over the MAS version, you will then have the latest version (currently v1.6.2) automatically registered to "App Store".


An elegant solution. Thank you DEVONTech!

Reply0 replies
Version 1.6.2
Anon-Bud Member IconComment+599

Not too sure what to think here. I've got the premier apps from Devon Technologies [DTPro Office and Devon Agent] and I use them all the time—actually DTPro Office is open all the time and I use it to store just about everything...]. But Devonsphere Express is very iffy right now. After the initial indexing, the app uses over 500MB of memory, even though it is idle for most of the time. I've got 8GB of memory, so this isn't that big a deal, but I keep over a dozen apps open continuously and the ones in the background [like DSphere] use very little memory [unlike DSphere].

Gonna have to give this pass, since functionality vs. memory load don't make it worth it for me.

Reply0 replies
Version 1.5
Penguirl Member IconComment+1057

The description sounds very intriguing, too bad there isn't a demo or trial version.

Reply1 reply
Version 1.5

Actually there is a demo version available on the developer's website or just click "Download Now."

Steven Goodheart Member IconReview+442
Steven Goodheart

I am a huge fan of DevonTechnolgies, and own DevontThink Pro, the hub and brain of my whole digital universe, and DevongAgent Pro, my brilliant research assistant. So, when I read the description of Devonsphere, I just bought it..with DevonTechnoogies, what could I lose for $4.00? -- except, well, $4.00. ;)

Anyway, I've had it for a few days, and I like it quite a bit, but hope they will keep developing and refining it. Like DTPro, it's uncanny in finding linkages between e-mails, web sites, docs, images etc. I'm still learning how to use it, but see lots of potential.

On my machine, a iMac with 4GB ram and 3.07 Ghz Intel Core 2 Duo, I find the program reasonably fast, except when it's indexing, and then, it can really hog the cpu for a while. Not inoperable, but I definitely feel the performance hit.

Unlike a previous reviewer here, I find that DevonSphere typically uses 150 to 350 mb of ram. The only time I've seen it go higher than that is when its indexing, then the "devonbot" can use 800 mb for a while, and then drops it all when done.) But in regular use, I've not had to go higher than 350 mb.

My Devonsphere database seems to be aroud 875 mb. I have a 3.07 Ghz Intel Core 2 Duo, and I find the program reasonably fast, except when it's indexing, and then, it can really hog the cpu for a while. Not inoperable, but I definitely feel the performance hit.

Unlike a previous reviewer here, I find that DevonSphere typically uses 150 to 350 mb of system ram, and I've not had to go higher than that. My DS database seems to be aroud 875 mb -- which does't seem so huge, to me, because as a science editor/writer, I have over 43,00writer images using 45 GB of disk space and over 36,000 PDFs, docs, etc. etc using 34 GB.

Devonsphere works well in Apple Mail and Safari and with desktop items. Devonsphere works well in Apple Mail, Safari and Chrome, but I wish it worked in Firefox and Picassa, too. I'm still trying it out, so I don't know what other programs it may or may not work with.

Overall, I'm pleased with the $4 I've spent, and hope that DT will continue to develop and broaden the programs it works with .

Reply0 replies
Version 1.3
Rochade Member IconReview+92

I could not wait to get this. The idea and user interface is once more brilliant! Thanks DEVONtechnologies.
But it consumes so much of my RAM (actually about 1-1.7GB from my installed 4GB) so it slows down every other app. If you have a lot of RAM available, get it! Else, think twice. In effect I can't have this app running at all.
The disk storage is about 1.3GB here once I quitted the app but of course this depends on what content you want to index (this can be adjusted in the prefs).
As far as I see, it doesn't use much CPU.

And please: stop bashing developers for the MAS. I want to know how a software works and not what you think about Apples business. And if you think such comments will change anything: it won't. Why do you think developers use the MAS? Because it is bad for their business?
The good thing is that I already have the visual representation of "MAS" in my mind and so can simply scroll down fast to a really useful review.

Reply2 replies
Version 1.1

Thanks, Rochade. That RAM usage is eye-popping and a deal killer for me. I too have 4 GB of RAM and in my normal work I need to keep several programs running and consistently have several GB swapped out. (Why oh why does OS X leak virtual memory?)


Rochade I agree the Ram usage is over the top. I have a quad core Mac Pro with 10 gigs of ram that I leave on most of the time and it seems the longer it's on the more it uses. Today it topped out at 7.5 gigs before I had to quit the program. I originally thought this was because of indexing and it maybe but after 3 weeks of only being rebooted once daily it still needs 7 gigs of memory? Good program though if they get the ram usage under control.

Iliketrash Member IconComment+206

This program looks like it could be amazing, BUT it looks like it could also be a memory hog, both in disk space for its database and in RAM for its functionality including the fact that it constantly adapts to what the user is doing.

Can anyone report on this? How big is the database (and how much user data do you have to catalog)? How much RAM does it use as you go about your usual work? (Use Activity Monitor to find out.)

Also, is it a CPU hog? (Also use Activity Monitor.)

Finally, is it easy to delete the database if one decides not to use it?

Reply2 replies
Version 1.1

I have a 2.0 quad core MacBook Pro with 8 GB of RAM and a 750 GB HDD with about 580 GB used.

My database is 2.29 GB. RAM usage is 669 MB. I was most concerned about the CPU usage as at first it was taking 100% of one core and the finder performance was noticeably sluggish, but this seems to have disappeared since the cataloguing has finished and it's now down to .1% of one core, so no complaints there.

I'm still figuring out how useful it is, but it seems better than Spotlight, which has become more disappointing with each system update.


Update 1.2 (available through the App Store) reduced RAM memory use to about 170 MB. So far the database size is about the same, though.

Espiridion Member IconComment+1147

I love Devon and their apps, but refuse to use the AppStore. Hopefully they'll offer this through their website as well.

Reply4 replies
Version 1.1
Sherman Wilcox

It's not gonna go away, you know.


Did I say I wanted it to go away? NO.
I've bought Devon apps (Devonagent, Devonthink Pro Office) through Devon's site. That's all I want to do with this one. If you read comments for other apps, plenty of Mac users dislike the App store. YMMV.

Sherman Wilcox

My mileage does vary. There have been plenty of times when I've chosen to buy through the developer rather than MAS (often so I can give all the profit to the developer). And times when I've bought through the MAS even though the product is available from the developer. And times when I buy from MAS when the product is ONLY available through MAS. I just don't get "I refuse to use the AppStore." But I agree, YMMV, it's your choice what to buy and what not to buy.


From Devon's newsletter:
"Step by step we will make all our commercial apps available also through our own shop for those of you who can't or don't want to buy in the Mac App Store."

Surikat Member IconReview+5

Great! Very useful!

Reply0 replies
Version 1.1
user icon+1
Version 1.6.2
user icon+0
Version 1.5
> 4 7


Current Version (1.x)


Downloads 20,519
Version Downloads 1,639
License Demo
Date 22 May 2014
Platform Intel 64 / OS X / Intel 32
Price $9.95
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