CF-Predictor

Name: CF-Predictor
Rating: 4.193939393939394 (165 reviews)
Author: Wsl_F

This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.

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CF-Predictor is a handy Chrome extension designed for competitive programmers on Codeforces. It modifies the contest standings page to display approximate rating changes for every participant, both during and after contests. This real-time insight helps reduce the anxiety of waiting for official rating updates by providing immediate feedback on your expected rating delta.

By integrating seamlessly with Codeforces, CF-Predictor offers a unique way to visualize your performance and anticipate your rating changes, empowering you to track your progress more effectively and keep your competitive edge sharp.

Extension Developer Tools Programming Productivity

By:

Wsl_F

Users:

50,000

Rating:

4.19

(165)

Version:

1.3.2 Last updated: 2022-11-28

Creation date:

2020-06-16

Risk:

Host permissions:

https://cf-predictor.wasylf.xyz/

Size:

87.00K

Email:

Wa*****@gmail.com

Full description:

Source:

Chrome Web Store

Updated:

a day ago

Ranking

# 3,480 ▲ 36

Other rankings

#1648 in Developer Tools ▲ 2 #38 in rating keyword 20 ▲ 2

Other platforms

CF-Predictor (v1.3.2)

1,315 4.71

(45)

User reviews

CF-Predictor is appreciated by users for providing approximate and often accurate rating predictions that help in anticipating contest results. Many users find it very useful and commend the developer. However, a significant number of reviews report that the extension frequently stops working, often showing only generic good luck messages and failing to give meaningful predictions. Additionally, some users note that the rating predictions are approximate and can sometimes deviate considerably from actual results. Overall, while it is a helpful tool, stability and accuracy issues affect its usability.

Pros

Provides approximate rating predictions that can be very close to actual contest ratings.
Users find it useful and appreciate its functionality when it works.
Recognized as an amazing and accurate tool for rating predictions by some users.
Gets kudos and thanks from users who experienced its positive features.

Cons

The extension frequently stops working or doesn't function as expected for extended periods.
Output sometimes shows only generic messages like "Good luck & high rating!" instead of detailed predictions.
Rating predictions are approximate and can sometimes be significantly off (e.g., 10-15% less than actual ratings).
No recent updates or fixes noted despite multiple user complaints about non-functionality.

Recent reviews

not working

SO*****, 2025-02-10

not working

Fi*****, 2025-01-26

not working

Ta*****, 2024-11-17

View all user reviews ›

Extension safety

Risk impact

CF-Predictor requires very minimum permissions.

Risk impact analysis details

High Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
Low ******* ****** ** *** ********* ******** ********************

Risk likelihood

CF-Predictor has earned a good reputation and can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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