What is WeFast?
WeFast is a mobile app helping people to have a healthier lifestyle through intermittent fasting. The app is compatible with iOS and Android, with tech stack in Kotlin, and is powered by Firebase, Amplitude, etc.
Why are we building this?
Investing in the early 70% of built-up app users are aged 18–35. Additionally, most people are quite able to afford an Apple Watch or monthly Amazon Kindle service.
We’re also finding that many Facebook groups that are enthusiastic about hundred-thousand-level active users. With that, we realized that fasting is a lifestyle that users look up to and feel they could apply in their daily routines.
Therefore, we believe there is a high impact if we can have different tools perfectly designed for fasting.
My role & The team
Dylan was searching for a founding designer who has rich mobile app experience to help build an intermittent fasting app in 3 months. I took this ambitious goal and started to work on this project in April 2021. I worked very closely with founders. I was responsible for the end-to-end design process from research, wire-framing, prototyping, and creation of pixel-perfect mockups.
Our team includes
The team was very small, only including 1 Product Manager (Founder), 1 Marketing manager (Co-Founder), 1 Community Manager, 1 iOS Developer, 1 Data Specialist.
My scope includes
- Research all the popular fasting apps.
- Design the whole app from scratch.
- Create the launch assets for Appstore.
- Define the visual identity of the app. Color, Typography…
- Support the founder to run user tests.
- Iterate the design many times based on the data and user feedback.
- Collaborate with the iOS Developer to build the app.
- Communicate tasks to our Illustrator.
What do we know about the users?
In the beginning, we didn’t really know what kind of people will be the majority of the app users. Luckily, through the data collection feedback, we were able to define our target users:
- 65% of the app users want to lose weight.
- 25% of the app users want to build healthy habits.
- 10% of the app users want to motivate themselves to keep maintained in shape.
- Last, self-learners, a desire to build healthy habits on a planned lifestyle.
- By data, we are able to clearly set our tone for this group of people.
- Close to 1 quarter, we found most users clarified as healthy.
Case Study:
Improved the fasting ring keep users more motivated.
Case Study:
New notification design improved the opt-in rate.
Key achievements
Since launched on April 2021, we already hit 250k downloads, 7M active premium users, 1M in sales, a 30 rated and more than 200K reviews with a 4.9-star rating on the App Store.
The founders love the work
We kept breaking our records
People love WeFast app
Final thoughts
Although I had much exposure to design mobile apps in the past, this was my first time building a mobile app totally from scratch. I got to lead the design, work with the founders to shape the product, and see how a small team can build something that truly resonates with users.
I learned that if we keep listening to what users need — and act on it — the product will keep growing. It was incredibly rewarding to see our users love the app and keep coming back every day.
A huge thank you to the entire WeFast team for this opportunity and journey. It was truly one of the most meaningful projects I’ve worked on.
Thank you for reading.