Browser Extensions 



Close

Why is ReviewMeta.com a Must-Have for Amazon Shoppers?


Free Phone Apps

Free Browser Extensions




RAVPower USB 充電器 [4ポート/40W/折り畳み式プラグ/急速充電] AC アダプター...
More product info From RAVPOWER

5% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
Jump to Report Card

Report Card

Pass Overall Grade
FAIL Rating Trend
FAIL Overlapping Review History
WARN Word Count Comparison
WARN Reviewer Participation
PASS Unverified Purchases
PASS Suspicious Reviewers
PASS Reviewer Ease
PASS Brand Repeats
PASS Deleted Reviews
N/A Phrase Repetition
N/A Incentivized Reviews

Most Trusted Reviews

当たり前かもしれないけ... [Go to full review]
Jun 20, 2017      
100% TRUST
  • Verified Purchaser
  • Critical Reviewer (avg. rating: 3.5)


Least Trusted Reviews

5/5
旅行に行った際使用しま... [Go to full review]
Nov 17, 2017      
0% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • Overrepresented word count (27 words)
  • Overlapping Review History: reviewed 1 of 9 top products
  • Overrepresented Participation (posted 17 Reviews)
  • Easy Grader (avg. rating: 4.7)


Analysis Details

Fail Rating Trend

  • 4%
  • Created over 5 days

We counted 783 reviews for this product over the span of 959 days, an average of 0.8 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 5 or fewer reviews on any given day.

However, we see the following 5 days exceeding this threshold:In total, we found that 34 reviews were created on just 5 days. The reviews on these high volume days have rated this product an average of 4.7 while reviews from other days have rated this product an average of 4.4. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.

from reviews created on high volume days

from reviews created on normal volume days


4.7
4.4


Read more about our Rating Trend test.

Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:

2% also reviewed:
Fire TV Stick by Amazon

Does not include products
from the same brand


78 of the 783 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.6 while the reviewers who have a more unique product review history rated this product an average of 4.4. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.6
4.4


Read more about our Overlapping Review History test.

Warn Word Count Comparison
Word counts are approximated for Hanzi and Kanji


  • 48%
  • Have an overrepresented word count

In the graph above, we can see the distribution of review word counts for this product and the expected distribution for this category. We see the following 2 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 376 reviews (or 48%) are within an overrepresented word count group. While this is more reviews from overrepresented word count groups than we'd expect to see, these reviews do not appear to have a significant impact on the overall rating.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.4
4.4


Read more about our Word Count Comparison test.

Warn Reviewer Participation

  • 49%
  • From reviewers with an overrepresented participation

We see the following 1 participation group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 381 reviewers (or 49%) are within an overrepresented participation group. While this is more reviews from overrepresented participation groups than we'd expect to see, the discrepancy in ratings between reviewers in an overrepresented participation groups and all other reviewers isn’t significant enough to rule out the possibility of it being due to random chance.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


4.5
4.4


Read more about our Reviewer Participation test.

Pass Unverified Purchases

69 of the 783 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from unverified purchasers

from verified purchases


4.4
4.4


Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.

Pass Suspicious Reviewers

One-Hit Wonders


47 of the 783 reviewers have only reviewed this product. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from one-hit wonders

from reviewers with more than one review


3.9
4.5


Never-Verified Reviewers


28 of the 783 reviewers have never written a verified purchase review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from never-verified reviewers

from reviewers with at least one verified purchase review


4.3
4.4


Take-Back Reviewers


6 of the 783 reviewers have had at least one of their past reviews for another product deleted. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from take-back reviewers

from reviewers without previously deleted reviews


4.5
4.4


Single-Day Reviewers


17 of the 783 reviewers have written multiple reviews but posted all of them on a single day. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from single-day reviewers

from non-single-day reviewers


4.6
4.4


Read more about our Suspicious Reviewers test.

Pass Reviewer Ease
The ease score is the average rating for all reviews that a given reviewer submits. The average ease score for reviewers of this product is 4.3, while the average ease score for reviewers in this category is 4.2. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.

4.3 Product's Average Ease Score

4.2 Category's Average Ease Score


4.3
4.2


Read more about our Reviewer Ease test.


Pass Brand Repeats

Brand Repeaters


29 of the 783 reviewers have reviewed other products for this brand. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from Brand Repeaters

from Non-Repeaters


4.6
4.4


Read more about our Brand Repeats test.

Pass Deleted Reviews
  • 0
  • Reviews have been deleted
We have not discovered any deleted reviews for this product.

There are a few limitations to keep in mind regarding the Deleted Reviews test:
  1. We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
  2. We have no information on reviews that were never published in the first place.
  3. We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.
Read more about our Deleted Reviews test.

N/A Phrase Repetition
We have not yet completed optimization for this test for Hanzi or Kanji.

N/A Incentivized Reviews
We have not yet completed optimization for this test for Hanzi or Kanji.