How does RateBud detect fake Amazon reviews?

RateBud uses advanced AI to analyze review patterns, language authenticity, timing anomalies, and content quality. We examine reviewer behavior, review velocity, and linguistic markers to detect fake reviews with high accuracy.

What does the trust score mean?

The trust score is a percentage from 0-100% indicating review authenticity. This product scored 93% (Grade A). Scores above 80% indicate highly trustworthy reviews, 60-79% are generally reliable, and below 60% suggest caution.

Is RateBud's review analysis free?

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Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit

Name: Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit
Brand: Fluidmaster
SKU: B09NYLJ1FZ
Price: 15.98 USD
Availability: InStock
Rating: 4.6 (2856 reviews)

4.6(2,856 reviews)

AI-powered analysis of this product's reviews to help you make an informed purchase decision.

0%🟢

Excellent

Trust Score

How trustworthy are the reviews for this product?

✓ Reviews appear trustworthy

Analysis Summary

Based on the analysis, the Fluidmaster K-400H-039 toilet fill valve has received overwhelmingly positive reviews, with a rating of 4.6/5 and an overall score of 93/100. Reviewers praised the product's high performance and consistency, which is a testament to Fluidmaster's reputation for producing reliable toilet parts. However, the lower seller reputation score of 78/100 suggests that some customers may have experienced issues with the seller's customer service or shipping.

Review Timeline

Review patterns over time - spikes may indicate manipulation

95%

Velocity Score

Spikes

None found

Peak

Reviews/mo

Timeline

Months

Pattern Analysis

Good: Review pattern appears natural with steady growth. No suspicious spikes that might indicate review manipulation.

Keyword Analysis

Common phrases and their authenticity patterns

81%

Authenticity

easy to install(5)works great(8)excellent product(11)

Positive

Natural phrases

Critical

Genuine concerns

Suspicious

Generic phrases

Language Authenticity

Vocabulary Diversity100%

Natural Language Flow93%

Unique Phrasing97%

Good: Language patterns appear natural with good diversity. Reviews use varied vocabulary and authentic expressions.

Recommendation

✅ Recommended

Analysis Date

September 29, 2025

Total Reviews

2,856 reviews analyzed

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Grade AFluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit