03 — Design Rationale
Why we built it
this way.
Every decision in Savr was made in direct response to something we observed, heard, or tested. Our research consistently pointed to one root cause: the problem is not a lack of financial knowledge, it is a lack of behavioral intervention at the right moment. That insight shaped everything from the core mechanic to the visual language.
Why we chose this solution
Our competitive analysis revealed that every major budgeting app on the market operates retrospectively. They show you what you have already spent, which does nothing to stop the behavior in the first place. Our user research confirmed this gap directly. Students told us they downloaded budgeting apps and never used them. They told us they already knew they were overspending. The knowledge was there. What was missing was a moment of pause between the impulse and the purchase. Savr is built entirely around creating that moment. Rather than adding another tracker to a student's phone, we designed a habit loop that intercepts the most vulnerable point in the buying process: the window between wanting something and acting on it.
The Swipe Mechanic
We chose a swipe interface deliberately because it borrows from one of the most familiar interaction patterns in mobile design. Our target users grew up with apps like Tinder, and the swipe gesture carries an immediate sense of agency and playfulness that a checklist or form never could. This matters because our research showed that existing financial tools feel like chores, which is precisely why they get abandoned. By framing the reflection as a game rather than a task, we lower the psychological barrier to engagement. The binary nature of swiping, keep or discard, also forces a decision rather than allowing indefinite procrastination, which mirrors the kind of decisive thinking we want users to develop over time.
The Cooldown Period
We implemented a waiting period between saving an item and deciding to purchase it because impulse buying happens during moments when a person is emotionally vulnerable, like stress, boredom, or FOMO. By creating a space between the impulse and the action, we interrupted the purchasing cycle that shopping platforms usually enable. The pause gives the users’ emotions time to settle and actually think rationally.
AI Reflection Prompts
While existing budgeting apps only show users what they’ve already spent, financial literacy alone doesn’t prevent impulse buying. It’s convenience and emotions that matter. We designed personalized AI reflections to make the cooldown period actually purposeful instead of just a delay. The prompts help users think about why they want an item, helping them distinguish between a need and a want. This makes the pause into a productive reflection.
Gamification and Streaks
We included streaks and a savings counter not as superficial decoration but because habit formation research consistently shows that visible progress is one of the strongest drivers of sustained behavior. The streak mechanic rewards consistency of reflection, not necessarily the outcome of the swipe. A user who keeps every item they reviewed still builds their streak, because the goal is the practice of pausing, not a particular financial outcome. The savings counter showing how much was not spent works similarly. It reframes restraint as a positive achievement rather than a sacrifice, which aligns with our core design philosophy of building self-awareness rather than enforcing restriction.
Saving Items Instead of Buying
We chose “save item” because the other options we thought about didn’t really solve the problem we saw with college students. Carts and wishlists already exist, but they don’t stop impulse buying since they still sit inside shopping apps and usually just lead to checkout anyway. Normal budgeting apps also don’t help since they focus on what you already spent rather than what you are about to spend. We also thought about stronger ideas like blocking purchases or forcing a waiting period, but that felt too strict. Most college students would probably ignore it or stop using the app altogether. So saving items was our middle ground. It takes the pressure off the decision, moves it out of the shopping app, and adds a pause without taking control away from the user.
Visual Design Decisions
The navy and lavender palette was chosen to feel calm and trustworthy without being clinical. Personal finance tools often lean into greens and grays that carry associations with spreadsheets and banking, which reinforces the intimidating quality we were trying to avoid. The softer lavender tones signal approachability. Inclusive Sans was selected because its name reflects a value the app holds: financial tools should feel accessible to people who have never used one before. The card-based layout keeps information digestible and avoids the overwhelming data-dense interfaces that our users told us caused them to stop using other apps. Every screen shows one thing at a time, which mirrors the one-item-at-a-time philosophy of the swipe mechanic itself.
How research shaped our decisions
Several specific research findings had direct and traceable influence on the design. When users told us they impulse shop most heavily late at night or during stressful periods, it confirmed that the problem is emotional rather than informational, which led us away from educational features and toward behavioral ones. When our affinity map revealed that free returns and one-click checkout were the specific frictions being removed by online shopping platforms, we recognized that Savr needed to reintroduce friction in a way that felt natural rather than punitive. When usability testing showed that users wanted the app to feel personalized rather than one-size-fits-all, we strengthened the onboarding flow to capture individual goals and spending triggers from the very first session. The design did not emerge from assumptions. It emerged from listening.
