One of the most fun and the most frustrating parts of app design is creating mock-ups and prototypes. You have so much freedom to flex your creative muscles. The problem, however, is making sure that your mock-ups and prototypes arenβt just functional, but that they give a real feeling of what the finished product will be. They will never be quite perfect, but if you find the right app icons, you can go from a good enough, embellished wireframe to an app someone might want on their phone then and there.
We want to show you some of the best collections weβve been able to find for these kinds of app icons. These should take your next project (and maybe even your current one) to the next level and make it so that your users canβt get over how great it looks.
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1. Icons8
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Icons8 is one of the most complete repositories of app icons out there. Not only do you get a downright wonderful selection of wireframe-ready icons, but they also offer a staggering amount of color icons that match almost every style standard there is. From the iOS/iPhone ones you see in the screencap above, to color icons, Windows Metro-style, material design, Android icons for different versions, and a lot more. You can see the number of expandable categories in the above picture. Also, theyβre free, which makes them even better, if you ask us.
That said, letβs look at some of the coolest app icons they have to give you a taste of what you can get from Icons8, and then you can poke around even deeper on your own.
Doodle
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Hand-drawn design is super hot right now, and whether thatβs with fonts or icons or other kinds of design elements, people notice it when you make something thatβs purposefully stylized. TheΒ Doodle collection from Icons8 is absolutely that. Whether your app needs specialized SVGs for each social network or web platform (and look at that WordPress icon up there β so cute), or standard navigation buttons or messaging smileys, Icon8βsΒ DoodleΒ app icon collection is one to look at.
Gaming
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Icon8βsΒ Gaming icon collection should appeal to nearly every app developer out there. We all want to have the next Candy Crush or Angry Birds, but making sure we pitch the mechanics and UI the right way is imperative. Before any real assets are created, create mock-ups using some of these app icons to see what your investors and team thinks. Game assets can be really expensive, but these free app icons can get you through those initial development stages so that you can see where your game needs tweaking before you spend a lot of design time on concepts that might have to be scrapped. Plus, thereβs a non-copyright-infringing kinda-Pokeball, so you have to give them props for that.
2. Iconfinder
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Iconfinder has a little bit of everything in their database. You can find app icons, technology icons, Apple-style icons, Android-style, color, black-and-white, outline, gradientβ¦well, you get the picture. Each collection of app icons is licensed a little differently because of being designed by different artists, but many of them are Creative Commons, and as you can see from the image above, even labeled asΒ Free for Commercial Use. Overall, we think youβre going to be pretty happy with anything you download from them.
Super Mono Stickers
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Most monotone app icons tend to be similar to one another. If you see one wireframe with gears and shopping carts, youβve seen a dozen. However, theΒ Super Mono Stickers collection puts just enough oomph and pizzazz on the icons to make them stand out. Specifically by making them look like stickers. The slightly raised effect gives just enough of a 3D look that anyone checking out your mock-up will know which ones are touchable and which ones arenβt. The texture gives it away. In fact, given theyβre Creative Commons 3.0 licensed, you could totally use these in your final project, and your users would think the same way. Minimalism works when done well, and these are just half a step above minimal to give your design flair without going overboard.
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If youβre looking for a new market to get into, let us suggest Chinese social. Social networking is huge, and the market for mobile apps in the country just keeps growing. And growing. And growing. If youβre looking for a way to capitalize on that growth, you really couldnβt do better than theΒ Chinaβs Social Share app icons collection. These are clean and simple, and you can include them in your final designs. Whether you intend to go into the market with your own social or messaging app, or if you just want to make social sharing that much easier and give lots of options, consider including these app icons.
3. Sketch App Sources
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We have little doubt that if youβre looking at collections of app icons that youβre already versed in Sketch. If not, though, check it out. Youβll love it. That said, Sketch App Resources is exactly what it sounds like a collection of nearly 4000 free resources that you can use in app design, prototyping, and full products that are ready to go gold. They do offer premium resources, too, so if you canβt find quite what you need in the freebies, you can check there to see what you can stumble upon. Admittedly, everything here isnβt a collection of app icons, but the ones that are are top-notch.
Interaction Gesture Kit
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Even though the entire world is used to swipe gestures and interacting with smartphones, your app still (likely) needs a tutorial. Or at least an intro splash to let users know exactly what they can do with your app. These gesture icons are perfect for that. If you need them to click, thereβs an icon for that. Need them to swipe up, then down? Combine a couple of these. Theyβre self-explanatory, using a pretty universal set of motions and interactions.
Isometric Building Blocks
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Pixel art is great, and itβs popular, and it makes your app stand out. So enter theΒ Isometric Building Blocks app icons. Well, we say icons, but they are a collection of building blocks (get it?) for you to build your own icons. Each block is a symbol that you can then use to manipulate into whatever icons your app needs. If youβre not sure where to begin with pixel art, we have you covered. And if youβre not into pixel art, thatβs okay, too. The blocks are brightly colored and stylized enough that any kidsβ app would be a perfect home for these little guys.
Wrapping Up
We have barely scratched the surface on what app icons each of these repositories have in collections. But weβve pointed out some of our favorites and some of the most useful and unique ones that should pique your interest enough to make a deep dive into these sites and come up for air with a few new ideas and resources for your projects.
Where do you usually get app icons for your mock-ups and final projects?
Article featured image by elenabsl / shutterstock.com

Great post. This is super helpful. I have been looking for this for ages.
Great resource. I usually buy through my stock photo account, but it’s somewhat limited. That’s the problem with designing apps, you can purchase and download a package with 50 icons, but it’s missing the one you really need, so you create it manually anyway. I think the icon makes a huge impact on new apps. It’s kinda a first impression thing.
I had that happen to me recently with some that I purchased. I was lucky that the collection included EPS files where I could alter the layers and combine ones that would work for the project.