Which Adobe Photoshop app for iPads can posterize images?

PS Express or Adobe Photoshop Fix would be your likely candidates, but if there's a posterize feature in either one I sure haven't been able to find it. You could opt for a stand alone app that does posterize (you'll probably fin that compared to doing it in the Desktop version of Photoshop that there's no good choice).

Affiniti Designer has Posterize (https://affinity.help/designer/en-US.lproj/index.html?page=/Adjustments/adjustment_posterize.html?title=Posterize adjustment)  It's $20.  Don't confuse it with their other product Affiniti Photo.

There was an announcement about Photoshop being ported to iOS back in July.  From what I've read, we'll see a preview in October at Adobe MAX and it'll be released sometime in 2019.

Michelle,  

Photoshop has a posterize feature under it's Adjustments heading of tools, click Posterize.  Take this link to find out how to posterize using Photoshop.  https://smallbusiness.chron.com/posterize-photos-photoshop-44629.html - in addition you can learn more from this link.   www.peachpit.com/articles/article.aspx?p=674693&seqNum=13

Steve Lehman, mcse   

It's the same thing on an iPad.  I'm not worried, I'm a tech who knows.   B-bye.   

I do not have access to Photoshop on the iPads, only Photoshop Express, Photoshop Fix, etc. ANy ideas?

You can do this with the Curves tool in Lightroom CC for iOS.

Applications on ipad are not that limited if you improvise.  Curves is one suggestion and works with Light Room and with Photoshop too.   Photoshop does different types of posterizing, in solid colors and light colors.   Today's students are technically minded and can find work-around's easily.  We're actually learning from kids these days.   

As for you, I suggest you work with a desktop version to know the tools well, then find the same or similar tools in ipad to do the same as it does in the full Photoshop, or in Elements.  Your ipad version may be a scaled-down version but most tools are there.  Elements has Beginners Mode as well as Expert Mode which loads all the tools, so you can know which tools work for you.  This will give you an exchange of ideas between teacher and students and the full version will be like a teacher's edition.   As for buying Elements, it's worth the price.  It'll be with you totally.   

SL

Something for every teacher to consider: If you're looking to build a skillset that students can use professionally in graphic design for print, web, ux, animation, broadcast or feature film work, the desktop version of Photoshop is the only way to go right now.  The work I do in broadcast marketing could not be done, in any way whatsoever, with what's currently offered on the iPad.  It can certainly supplement it, but not replace it.  Even if that changes, there's still the follow up applications InDesign, After Effects and Premiere Pro.  

iPads are great for social media posts.  

Hey Warren, I think that's why they got the ipads for the kids.  Something to afford, small, not too much for them to get engrossed on, and they will be limited so they can pay more attention to class.   But I agree with you on that one, that they should learn a greater productive utility.  They don't need to learn television video but they can at least learn how to move photos objects, make images, and learn many other things rather than colors, gradient or not-so-gradient colors and how those can contribute to posterize an image color, different points of light, how metering targets an image with a camera, how a camera sees an object, how the auto-focus locks onto an image, how a zoom lens balances focus with zoom.  And all of the editing parts of Photoshop, from camera to print.   They don't need to own a camera, but just know how lenses work, and to place themselves inside the Photoshop software, because --- the editor part of Photoshop mimics exactly how a camera works. IF they need a camera, I'd rather see kids use a low budget snapshot camera rather than the same one a professional uses.  Kids today have a fad of tossing cameras into the air to get "whiry pics" on the self-timer mode.  Then the camera smashes on cement and they ask their parents for another camera.   I had nonstop calls from parents asking how a camera can be made so cheap to fall apart as the kids told their parents they simple broke in their hand out of no where, as the kids won't tell the they smashed their camera on purpose - because its a fad.    IF the teacher can get far ahead of the students concerning this issue, I would help out wholeheartedly.  I can see how they might begin tossing their ipads into the air to get a whirly-pic because their buddy did.  Teacher, this is not a made up fad.  Please get ahead of it.   I have seen $3300 Canon 5D cameras being smashed, and my company just happens to fix them.   Not that I don't mind charging you $300 to $600 to replace a battery door, or another $1400 for a Canon or Nikon/Nikor lens, or maybe another $7000 for a 1.5 aperture 500mm lens, and that price is on a sale.  I have 5 cameras, digital and film cams for professional use.  But at least I can say, I still have my trusty Canon AE1 from 1972 and it works.   

SL