How Untold Uses Hume’s Expression Measurement API to Enhance Self-Reflection Through Journaling
By Serena Wang on March 6, 2025

Key Findings:
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Emotional Reflection Made Effortless: Untold leverages Hume’s Expression Measurement API to deliver detailed emotional insights during journaling, fostering moments of self-reflection and personal growth.
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Enhanced User Experience: By integrating Hume’s sentiment analysis, Untold offers a "Mood View" that allows users to track emotional trends over time, making journaling more insightful and engaging.
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Research-Backed Emotional Intelligence: Hume’s API, grounded in extensive research, delivers accurate and nuanced emotional analysis, outperforming in-house solutions and other LLM-based alternatives.
Untold’s Vision: A Journey Inward Through Emotional Awareness
Untold is on a mission to help people reconnect with their inner selves through audio journaling. Their app makes it easy and enjoyable to capture life’s moments while offering thoughtful prompts and insights to help users learn, grow, and reflect on their emotional journeys.
By integrating Hume’s Expression Measurement API, Untold provides users with a detailed emotional readout of their journal entries, offering a moment of validation and reflection. This emotional analysis helps users feel seen and understood, fostering a deeper connection with their own experiences.
Transformative Impact of Hume’s Expression Measurement API
Hume’s Expression Measurement API has been instrumental in enhancing Untold’s product offering by:
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Capturing Emotional Nuances: Hume’s expression measurement API provides users with a vivid and detailed emotional analysis of their journal entries. This allows users to reflect on their feelings in real-time, helping them ground themselves and view their situations with more compassion and objectivity.
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Tracking Emotional Trends: The "Mood View" feature, powered by Hume’s API, allows users to revisit past entries and monitor their emotional journey over time, uncovering trends that guide personal growth.
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Provide Clinical-Grade Accuracy: After initial in-house solutions fell short in consistency and subtlety, Untold adopted Hume’s EVI. Backed by clinical research, Hume’s solution delivers the depth and precision needed to capture the complexities of human emotion.
Evaluation Process and Results
Untold compared Hume’s Expression Measurement API to other baseline LLM prompts for expression measurement and found that Hume outperformed the alternatives. The sentence-level annotation provided by Hume’s API was particularly well-suited to Untold’s needs, offering a level of detail and accuracy that other solutions could not match.
Thanks to Hume’s Expression Measurement API, Untold was able to integrate mood analysis into its app within just a few weeks, demonstrating the ease of implementation and the flexibility of Hume’s API. Early feedback from users indicates that the emotional insights provided by Hume’s Expression Measurement API have made journaling more engaging and useful. Users appreciate the ability to revisit past entries and track their emotional trends over time, gaining deeper insights into their personal growth.
Conclusion
Untold’s partnership with Hume demonstrates the transformative power of empathic AI in fostering emotional reflection and personal growth. By integrating Hume’s Expression Measurement API, Untold has created a journaling experience that not only captures life’s moments but also provides users with the emotional insights needed to navigate their inner worlds. This innovative approach sets the stage for a future where emotional intelligence becomes an integral part of digital self-care.
For more information on how empathic AI can enhance your digital solutions, please contact Hume AI.
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