Koreez vs Improvis OC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Koreez
Engage in a knowledge-based competition with friends or solo. This app blends school curriculum with general knowledge for a challenging quiz experience. Climb leaderboards and become a quiz champion.
- Quiz battles with friends
- School curriculum integration
- General knowledge questions
- Leaderboard rankings
- Brainpower boosting
- Competitive gameplay
Read full descriptionHide full description
Embark on an epic journey of knowledge with Koreez - The ultimate quiz game for students! Are you ready to unleash the power of your brain and take on your friends in the ultimate battle of wits? Koreez isn't just any quiz game; it's a mind-bending adventure that combines your school curriculum with mind-boggling general knowledge questions. But here's the twist: You're not just answering questions; you're competing for glory! Collect points, climb the ranks on the leaderboard, and secure your place as the ultimate quiz champion. Calling all students from 5th to 12th grade! But hey, it's not just for students. Anyone hungry for knowledge and ready to embrace the challenge is welcome to join the fun! So, whether you're looking to outsmart your best friend or simply want to boost your brainpower, Koreez is your ticket to thrilling quiz battles and endless learning. Get ready to test your limits and sharpen your mind! Ready to accept the challenge? Download Koreez now and let the quest for knowledge begin!
Improvis OC
Read full descriptionHide full description
The Improvis OC mobile is a gateway to excellence in mathematics, physics, and computer science. Designed for students, coaches, and parents, it offers a seamless way to stay informed, track progress, and prepare for national and international olympiads with confidence. · User Accounts & Secure Login – Personalized access for students, coaches, and parents. · Performance & Achievement Tracking – Monitor individual or group progress, results, and milestones. · Attendance Management – View attendance records for classes, sessions, and events. · News & Announcements – Stay updated with real-time notifications on important events and activities. · Class Schedule & Event Calendar – Plan ahead with up-to-date schedules and upcoming event details.
Screenshots
Verdict
The clearest difference is in-app purchases: Improvis OC at none against Koreez's 10. Improvis OC also leads on iOS requirement (12.0 vs 16.6). Koreez's advantage is update cadence (every 9 days vs monthly). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Koreez sells 10 in-app purchases, starting at $3.99 per month. Improvis OC asks for nothing beyond the download.
Koreez ships an update every 9 days, Improvis OC monthly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | Koreez | Improvis OC |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (40 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 40 — better | — |
| Update frequency | Every 9 days — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 59 MB | 79 MB |
| Age rating | 4+ | 4+ |
| Developer | KoreezKoreez Educational Program CJS | Improvis LLC |
In-app purchases
Koreez
- Monthly Subscription7 Days trial$3.991 Month
- Monthly Subscription$4.951 Month
- Monthly Subscription7 Days trial$6.791 Month
Show 3 moreShow fewer
- Yearly Subscription7 Days trial$19.991 Year
- Yearly Subscription$37.491 Year
- Yearly Subscription7 Days trial$40.901 Year
- 30 keys$0.49
- 70 keys$0.99
- Certificate Download$1.99
Show 1 moreShow fewer
- Event Ticket$5.99
Improvis OC
No in-app purchases









