Proof of Usefulness Report

Cambly

Analysis completed on 1/16/2026

+574
Proof of Usefulness Score
Industry Mainstay

Cambly is a widely recognized, venture-backed language learning platform with significant global market share, which justifies high base scores for utility, reach, and traction. However, the submission itself was of extremely low quality, utilizing hyperbole ('most people have used my product', 'everyone') rather than verifiable data. Consequently, significant Quality Factor penalties (0.5x) were applied to Audience Reach and Evidence of Traction, reducing the final score from a potential 800+ to the 500-600 range.

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Score Breakdown

Real World Utility+225
Audience Reach Impact+90
Technical Innovation+105
Evidence Of Traction+118
Market Timing Relevance+80
Functional Completeness+5
Subtotal+623
Usefulness Multiplierx0.92
Final Score+573

Project Details

Project URL
Description
The Cambly app gives English learners instant 1-on-1 access to friendly native speakers over video chat 24/7. Students get an affordable and convenient way to practice their English and gain confidence. Tutors get to make money helping people from around the world practice English.
Audience Reach
everyone
Target Users
everyone
Technologies
Messaging Communications, Media Production
Traction Evidence
most people have used my product

Algorithm Insights

Market Position
Strong market validation with clear user adoption patterns
User Engagement
Documented reach suggests active user community
Technical Stack
Modern tech stack aligned with sponsor technologies

Recommendations to Increase Usefulness Score

Document User Growth

Provide specific metrics on user acquisition and retention rates

Showcase Revenue Model

Detail sustainable monetization strategy and current revenue streams

Expand Evidence Base

Include testimonials, case studies, and third-party validation

Technical Roadmap

Share development milestones and feature completion timeline