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 signalNo paid features detectedMedium-risk permissions
Competitive Companion
Parses competitive programming problems and sends them to various tools like CP Editor and CPH.
Users100KCurrent public install base
Rating4.8Store average score
Reviews111Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
2 assetsCompetitive Companion Media preview
Trend
User growth trend
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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
4.77
Latest
4.77
7-day rating change
0.00
2026年7月14日2026年7月20日
Growth overview
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1-day growthFlat
00%7-day growthFlat
00%30-day growthFlat
00%Technical snapshot
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Version2.64.0
ManifestV3
Size575KiB
Languages1English (United States)
Published
Store updated
Last crawled
English (United States)
Overview
Product summary
Review the store description, core capabilities, and common use cases.
Competitive Companion parses competitive programming problems and contests and sends the parsed data to various tools like CP Editor and CPH. At the moment it supports 117 online judges, including most major ones like AtCoder and Codeforces.
Using it is very simple. Just install the extension, make sure you got one of the supported tools open, navigate to a problem page and click on the green plus icon in the top-left of your browser. On websites where Competitive Companion is able to parse contests, navigating to the page with all the problems and clicking on the green plus icon will download and parse all problems in the contest at once. You can also use the Ctrl+Shift+U shortcut instead of the green plus icon (configurable on chrome://extensions/shortcuts).
Reviews
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Store average score4.8Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.6Average computed only from synced review bodies below
Reviews with text50Synced review bodies
Total ratings / reviews111Chrome Web Store public rating/review count
Store average score: 4.8. 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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Excellent!
Very Work，Thanks！
Great work !!
Super useful, and Jasper updates it frequently to fix any issues that come up.
Very Useful Sir. Thanks a lot. :)
Awesome extension!
Good work!
Doesn't work
This works like a charm! A must-have for every competitive programmer!
For some reason, extension "CHelper extension" is not parsing test cases (CF) in my chrome. But this one correctly does. Thank you! :)