The platform offers many different options that others don't offer when creating prototypes. This includes fixing and editing screens within the platform, and making static/dynamic parts of a screen, all within one screen. Review collected by and hosted on G2.com.

I had a ton of difficulty as to how to make my very long screen scrollable in the prototype. After resulting to many, many forums, I found that my answer wasn't even easy. I had to create a "container" for all screens that exceeded the height of the screen resolution. This will take me forever. Review collected by and hosted on G2.com.

Proto.io can create cyclical and fully functioning prototypes that very closely mimic the real thing. If done well enough it can trick many people into believing it's a legitimate app and not just a web app. It uses Groups and Containers to create functioning animations/interactions within views and you can easily and quickly animate between states creating very nice animations. There are variables and functions that allow the creator to save data such as names and addresses as well as create intricate and interesting interactions. However my favorite feature is animating between states, you create one state, place an object, create another state and then move the object and it will animate between those states - simple. Review collected by and hosted on G2.com.

Variables were created about 2 years ago and not improved upon since then. The interface is fairly difficult to use but can be powerful when understood. Heavy prototypes can mess up just because they are complicated and not for any reason such as poor implementation. They can also be slow to update the web app. There isn't too much to dislike about Proto.io, there is a slight learning curve but once you begin to get it you start wanting to play with it and explore more of what it can do. Review collected by and hosted on G2.com.

I think this really interesting and fascinating idea. The screens allow you to change to frequently used applications at will allows more creative and interested in this sort of thing to have fun and create their layout to your liking.

Starter projects for common interface models like sliding menus and tabbed apps. This can be a real time-saver if you know you’ll use these in your prototype. Review collected by and hosted on G2.com.

At first glance, for novice users may not be very intuitive. I believe in my humble opinion that the initial instructions are not intuitive and too wasteful.

Proto.io does back up each saved version of the entire project, but not at a page or screen level like the Team Projects feature in Axure. The lack of page-level versioning can be a serious problem in settings where several designers are working on large prototypes with lots of pages. Review collected by and hosted on G2.com.

Proto.io makes it possible for non technical cofounders to build a working prototype for their app. No coding required. Photoshop integration. Amazing support. Review collected by and hosted on G2.com.

There are a few nitpicky things with the UI that I don't like but honestly there's not much to complain about. Review collected by and hosted on G2.com.

Simple interface, low cost, powerful prototype builder, minimal coding knowledge required Review collected by and hosted on G2.com.

There are really no negatives. They offer a free plan for bootstrapping entrepreneurs and are really amazing at working with you to fit your budget Review collected by and hosted on G2.com.

It's pretty foolproof for clients that are not only 'dumb' when it comes to web design, but they also struggle with understanding prototypes. Putting it in an environment they understand helps them get comfortable with the wireframes & design and start to play with it. Review collected by and hosted on G2.com.

It's a bit clunky to ramp up on. There are so many interactive prototype platforms out there I get annoyed needing to learn yet another one. Review collected by and hosted on G2.com.

Login and registration is super easy.

Simple UI

Easy to use

I like that you supported keyboard buttons, so that I can move stuff in the canvas using the arrow keys. Review collected by and hosted on G2.com.

Only supports single finger tap, No support for other gestures.

I could not find the orientation setting, don't know how to change the orientation

Also, this thing has to be smart enough to populate the UI when I change the orientation in the preview mode.

Social buttons is becoming a popular component on any app, I could not find them in the component pallette.

No centralized theme manager, so that I can change the colors and fonts. I have to do color changing and font property modification one by one everywhere. Review collected by and hosted on G2.com.

I really like that Proto provides a way to make graphically- and functionally-complex prototypes that can be viewed and tested easily across a variety of devices (Android, iOS, PC browser) without any substantial coding. I also really liked how easy it was to bring in graphically-realistic UI elements for mobile (keyboards, buttons, etc.) so the prototype mockups could be tested at a conceptual level, without testers getting distracted by unrealistic UI. Finally, I really liked how Proto provided offline access to downloaded projects - this was very helpful when doing user tests "on the road". Review collected by and hosted on G2.com.

When using Proto, I frequently wished for an easier way to make stateful conditional logic so user actions like button presses can trigger layout changes on a single screen. For mocking up single-page mobile applications, that capability is very important for getting the screens to come up properly without having to modify lots of overlaid elements' visibility.

I also disliked that there was no way to "save and download" a Proto project that could be uploaded later. This meant that, to prevent our work from being lost, we had to keep paying for a Parked account... this is great for the times when we just wanted to do user testing on our product design (when Parked, a design is still viewable) but other times meant we were paying to simply keep our design available for any future use. Review collected by and hosted on G2.com.

Proto is simple and doesn't require coding to create prototype. Proto allows to easily create prototypes for of quite complicated products and platforms (even iOS and Material Design interfaces). Review collected by and hosted on G2.com.

Usability, time to sync and preformance.

I have sometime had a little bugs when you rotate the screen. Review collected by and hosted on G2.com.

Proto is simple and doesn't require coding to create prototype. Proto allows to easily create prototypes for of quite complicated products and platforms (even iOS and Material Design interfaces). The service interface is comfortable and the prices are pretty good. Documentation is also great. Review collected by and hosted on G2.com.

So far everything just worked for me with Proto.io. Review collected by and hosted on G2.com.