Ⅳ. Prototype
Design solution
We combined the product features from the 2 storyboards because we perceived that this way effectively addresses all 6 design requirements that we proposed previously. We envisioned a mobile app and a kiosk that offer second-hand laptop selling, lending, and buying services. We decided to use Figma to design 3 levels of fidelity prototype: low, mid, and high, where we could collaborate and do high-level brainstorming.
Low-fi Prototype
We did parallel prototypes, where we created multiple alternative designs simultaneously, so we had the freedom to design our own versions of the product and later combined the best and most creative design features into a low-fidelity prototype.

Mid-fi Prototype
After confirming the main features and the workflows, we turned a hand-drawing low-fi into a mid-fidelity prototype on Figma to clarify the main design, elementary layouts, and roadmaps of the product and build a clear path to a hi-fi prototype.

High-fi Prototype
With the preparation of the low-fi and mid-fi prototypes, we were ready to make a hi-fi prototype on Figma by applying the design system and integrating the interactive elements. The hi-fi prototype also prepares for usability testing and product iteration in the next step
I am responsible for designing onboarding, lending and selling process, search function, and account setting page. Another designer in the team worked on the rest of the features.
Design System
We created moodboards to define a visual language for our design. We believe that the UI should give users a friendly, approachable, inviting, sustainable, and futuristic impression, so we carefully selected the below colors, icons, and fonts for the finished product to express the design theme.

Onboarding
Building a trustworthy laptop circular community (my design)

Lending a Laptop
Lending laptops to students for flexible uses (my design)

Listing a Not-in-use Laptop
Incentivizing students to resell, lend out, and recycle unwanted laptops

Searching for a Laptop
Quickly finding a laptop with demanded specifications (my design)

Checking Laptop Status
Making laptop reusing options visible (my design)

Dropping off and Picking up Laptops at the Kiosk
Providing accessible Kiosk locations for students to drop-off and pick-up laptops
