Personalization
Join debates around the world on a bunch of different topics
Live debates with your friends
Get detailed feedback from Gemini
Upload a resume to get insights
Step down the path of greatness
Practice for that big interview
Debate service architecture
One on one coaching

Inspiration:

Vocalyze was inspired by a simple gap: people know speaking well is career-defining, but most tools for improving it are either passive, generic, or not built for consistent daily practice. We wanted to build a professional speaking gym—something that combines game-like progression loops, practical speaking scenarios (interviews, impromptu, persuasion), measurable performance states, and social pressure through real-time debate rooms. The goal was not “just another speaking app,” but a system that makes deliberate speaking practice repeatable and motivating.

What it does:

Vocalyze is a gamified speaking platform with two major systems:

1) Practice Paths (single-player progression)

Users choose a path:

Interview Arena
Think Fast
Persuade & Pitch

Each path is structured as a level ladder. Users must pass a level to unlock the next. Completing all levels marks the path as Mastered.

Progress state: $$ P_{\text{path}} = {\text{passed},\ \text{unlocked},\ \text{mastered}} $$

Unlock logic: $$ \text{unlock}_{k+1} = \begin{cases} 1 & \text{if } \text{score}_k \ge \tau_k \ 0 & \text{otherwise} \end{cases} $$

Bounded next-level unlock: $$ \text{unlocked} = \min(L_{\max},\ \text{passed} + 1) $$ Mastery condition: $$ \text{mastered}(\text{path}) = 1 $$

$$ \iff \forall k \in {1,\dots,L},\ \text{score}_k \ge \tau_k $$

2) Club (social debate mode)

Club supports room-based debate: create a room (single active room constraint), wait in lobby for another player, or play instantly with a friend nearby. Each room gets a random debate topic from a curated topic pool and launches debate context in live mode. Room representation: $$ R = {\text{id},\ \text{status},\ \text{topic},\ \text{capacity},\ \text{mode}} $$

How we built it:

(i) Frontend:

React Native + Expo Tab + stack navigation architecture

Custom gamified UI components for: path cards, node maps, progression surfaces, club lobby cards and controls.

(ii) Backend:

Node.js + Express + Mongoose debate/profile route scaffolding environment-based config Gemini service integration path for AI feedback expansion.

Logic architecture:

Path progression, unlocks, room state, and handoff were implemented as explicit state transitions so the UI and gameplay behavior stay deterministic and testable.

Challenges we ran into:

Rapid product iteration changed core IA repeatedly
We moved between auth/no-auth, altered entry flow, and refactored route structure mid-build.
Nested scroll contention in React Native
Parent/child scroll views conflicted in map interactions; we resolved gesture ownership and viewport constraints.
State consistency during fast UI rewrites
We had to keep progression truth consistent while redesigning visual systems.
Dependency drift after upstream pulls
New package requirements introduced runtime mismatch until versions were reconciled.

Accomplishments we’re proud of:

Implemented a complete level-gated path mastery system.
Built a functional single-room club lobby flow with random topic generation.
Reduced onboarding friction to:
Welcome → Focus selection → App
Achieved coherent design language while iterating fast.
Preserved production-minded modularity despite hackathon speed.

What we learned:

Learning loops beat feature volume: prompt → perform → feedback → unlock is the core retention engine.
State models must be explicit early to avoid progression edge-case bugs.
UX trust matters: real states > decorative fake metrics.
Navigation contracts are critical in fast-moving React Native builds.