Project

Decima

Industry

HealthTech

What We Delivered

Product Design, Mobile Application Development, AI Integration & Testing

AI-Powered Health Coaching Platform

Concept

Decima combines biometric data from Apple HealthKit with AI coaching personas and adaptive task planning to help users achieve long-term health outcomes through daily engagement, voice interaction, and data-driven feedback.

Complex AI System Integration

Integrating Whisper STT, ElevenLabs TTS, and LLMs required flawless real-time processing. Maintaining persona consistency across voice/text interactions proved challenging, especially with network variability.

Protocol Compliance

The AI strictly followed proprietary health protocols across billions of recommendation combinations. Preventing LLM deviations required rigorous prompt engineering and database filtering to maintain scientific validity while personalizing outputs.

Adaptive Task Scheduling

Tasks generated from health data integrated with Apple Calendar. PostgreSQL tracked completion rates to dynamically adjust difficulty. The system balanced user capabilities with progressive challenges.

Challenges

Health Data Synchronization

Continuous Apple HealthKit syncing for sleep, activity and biomarkers demanded real-time normalization. Calculating composite health scores from inconsistent data streams required sophisticated algorithms.

Persona Management

The admin panel enabled unlimited customizable personas with unique voices/behaviors. Implementing A/B testing while ensuring real-time updates without service interruptions demanded innovative database architectures for voice consistency.

Content Personalization

LLMs extracted keywords from chats to filter Feedly content. Cron jobs refreshed recommendations while relevance scoring prevented overload. Content aligned precisely with user health levels and goals through continuous optimization.

Design Complexities

Seamless Voice-Driven Persona Interaction UI

Designing an interface to support real-time, natural voice conversations with dynamic personas like the Drill Sergeant or Gentle Motivator, while managing tone consistency, microphone access, and fallback text input options, demanded extreme precision.

Dynamic Health Visualization Across Metrics

Creating intuitive visualizations for real-time health metrics like AQI, sleep trends, and activity scores, while normalizing data inconsistencies and ensuring immediate feedback through adaptive charts and daily scoring indicators, introduced immense frontend architectural complexity.

Calendar-Embedded Adaptive Task Management

Embedding dynamically scheduled health tasks into a seamless Apple Calendar integration UI, including conflict handling, dynamic rescheduling, real-time task scoring, and user-friendly reminders, forced non-traditional design patterns in modular event-driven interfaces.

Admin-Controlled Persona Builder Interface

Building a highly flexible, user-friendly Coach Builder interface that enabled admins to create, modify, test, and A/B evaluate synthetic or influencer-based personas on demand presented significant design challenges for modularity and interaction layering.

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Branding & Style

Solution

Kodexo Labs successfully tackled Decima’s massive technical and design challenges by engineering a deeply modular, AI-driven health platform. We solved real-time voice interaction with persona fidelity using OpenAI Whisper and ElevenLabs TTS, synchronized fragmented health data from Apple HealthKit with seamless normalization, and visualized analytics dynamically. Our team built an adaptive task management engine fully integrated with Apple Calendar, and developed an advanced, admin-controlled persona builder. Leveraging React Native, FastAPI, and AWS, we created a HIPAA-compliant, highly scalable foundation capable of evolving Decima’s future health personalization vision with unmatched precision.

Impact

70% Increase in User Adherence

Personalized voice coaching and task reminders help users stay engaged daily, improving adherence and ensuring consistent follow-through.

60% Improvement in Data Usability

Visual scores and behavior-based feedback simplify health data, turning complex metrics into clear, actionable insights for better decision-making.

50% Faster Content Alignment

Automated content delivery adjusts in real time, reflecting changes in user goals, behaviors, and health levels for seamless alignment.

100% Admin Configurability

The platform allows internal teams to manage coaching tone, logic, and metrics independently, eliminating the need for developer input in customizations.