How does
CrowdChunk work?


CrowdChunk scores apps by what reviewers actually have to say. We’ve replaced the imprecise, highly subjective star ratings and upvoting with a more objective analysis.

Every English language app review ever submitted to the Google Play and iOS App stores is fed into our machine learning classifier. This wealth of data is devoured by our scoring system, which breaks it down into several key subjects. Apps are given a score based on the positivity and negativity expressed by reviewers about those subjects. Each statement is given a ranking on the intensity of its sentiment, separating the positive from the very positive, the negative from the very negative. If a sentence is ambiguous, our algorithm will pick it out, keeping it from counting toward the Metascore, our at-a-glance measurement of an app's overall quality.

We then compare this score to the category average, giving you an idea of how an app performs in relation to its competitors.

This is more than keyword matching. Our system is flexible, accurate, and precise. CrowdChunk can determine the difference between reviews that may mention the same attribute, but in very different ways. For example, “This app drains my battery quickly” and “this app makes my battery use more efficient” are two completely different statements that both mention “battery.” CrowdChunk analyzes the intent of a sentence, giving you the data to answer the big question: is this a quality app?

CrowdChunk is the intersection of user sentiment and topics. Fundamentally complex, but presented in an user friendly way, our scores are a statistically accurate depiction of what people think about an app, powered by a dynamic linguistic engine analyzing intensity, focus, purity, crispness and other app review signals.


We use a set of topic classifiers to determine the key traits people mention when reviewing an app, several of which exemplify key app metrics in the context of consumer sentiment and star rating. Each positive and negative statement from a review about one of these traits contributes to the app’s final Metascore. We then rank this score on a scale of 1 to 10, 10 being best.


When performance is excellent, it fades into the background, earning an app a higher score on our scale of 1 - 10. If an app drains the battery, uses up data, or is slow and laggy, the user experience is severely compromised, pulling the app’s Performance rating down.


An app with a high score on our Enjoyment scale is fun, enchanting, engaging. It’s the kind of app you find yourself returning to it several times a day and recommending to your friends. A low scoring app is forgettable and boring, and may seem aimless.


A well designed app is a thing of beauty, with intuitive actions, attractive interactions, and enjoyable graphics that help it earn a high Presentation score. Dated, confusing, and uninviting visuals will earn an app a low score.


To be ranked highly, an app must present outstanding value; simply stated, it’s worth the price. A low scoring app might be free to play or use, but may require many additional purchases to reach higher levels or unlock more features.

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