CF-Predictor icon

CF-Predictor

by Wsl_F · Developer Tools
FeaturedManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

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

Users
50K
0 in 30 days
Rating
3.3 / 5
−0.81 in 30 days
Ratings
172
0 in 30 days
Store rank
#3,474
#3,030 among extensions
Version
1.3.2
updated 28 Nov 2022

Users

monthly, 3 years
10K30K50KAug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 50,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
40106172Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 172 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About CF-Predictor

A huge number of your nerve cells die every time when you wait for a rating update on Codeforces. Stop this! From now you could use this extension, it partly modifies the contest standings page and shows approximate rating changes for every contestant.

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%0−0.81
30 days0+0.0%0−0.81
6 months0+0.0%+1−0.82
1 year0+0.0%+5−0.89

Chrome Web Store search rankings

Where CF-Predictor appears when people search the store, with the 30 day change
Search phrasePosition30 days
rating#17+10

Version history

3 versions recorded
1.3.227 Nov 2022
1.3.11 Dec 2021
1.3.016 Jun 2020

Details

Category
Developer Tools
First seen
16 Jun 2020
Size
85 KB
Languages
en
Pricing
Free
Support
codeforces.com
Extension ID
ocfloejijfhhkkdmheodbaanephbnfhn

Permissions and risk

Minimal riskimpact 1, likelihood 0
Site access
https://cf-predictor.wasylf.xyz/

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