CF-Predictor
Developer Tools
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
Users
50K
Rating
4.1
Reviews
171
7D Growth
0|0%
Stable signalUnknownMedium-risk permissions
Carrot
Rating predictor for Codeforces
Users50KCurrent public install base
Rating4.2Store average score
Reviews80Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
1 assetsCarrot Media preview
Trend
User growth trend
Review user movement across collected snapshots.
User Growth Over Time
Rating trend
7-day rating trend
View collected rating snapshots from the latest 7-day window to assess rating stability.
7-day rating change
Start
4.15
Latest
4.15
7-day rating change
0.00
2026年7月14日2026年7月20日
Growth overview
Daily, weekly, and monthly growth
Compare 1-day, 7-day, and 30-day net growth and growth rate.
1-day growthFlat
00%7-day growthFlat
00%30-day growthDeclining
-10K-16.7%Technical snapshot
Version, languages, and crawl freshness
Review publication date, version, supported languages, and crawl timestamps.
Version0.6.8
ManifestV3
Size47.38KiB
Languages1English
Published
Store updated
Last crawled
English
Overview
Product summary
Review the store description, core capabilities, and common use cases.
Carrot enhances Codeforces ranklists.
For an active contest:
Carrot calculates rating changes according the current standings when you open the ranklist, and displays them in a new column. Carrot also adds a column showing the delta required to rank up. The delta calculation is done in real time a̶n̶d̶ ̶i̶s̶ ̶1̶0̶0̶%̶ ̶a̶c̶c̶u̶r̶a̶t̶e̶ (see note below).
For a finished contest:
Carrot displays the final deltas of each contestant in a new column and shows their rank change, if any, in an adjacent column.
For both active and finished contests, Carrot displays a column for performance, the rating at which the delta would be zero.
Reviews
Recent review snapshot
Inspect the latest comments and rating distribution.
Store average score4.2Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average3.4Average computed only from synced review bodies below
Reviews with text42Synced review bodies
Total ratings / reviews80Chrome Web Store public rating/review count
Store average score: 4.2. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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It's not working anymore. Error: Uncaught Error: Could not establish connection. Receiving end does not exist.
Not working anymore. Getting: [Carrot] Predict error: Error: Uncaught Error: Uncaught Error: CF API: HTTP error 400: {"status":"FAILED","comment":"contestId: You have to be authenticated to use this method"}
good one
Can someone tell me whether this works on virtual contests? If yes then how to use it and if no, then are there any alternate's for it?
Not working correctly since last few days
Takes too long to load nowdays, which causes Chrome to crash
Not working now, It throws the following error : Error: Could not establish connection. Receiving end does not exist.
Best cf rating predictor
Sometimes don't work, but the actual working is pretty accurate.
Working like a charm!!!