CodecityApp
CoderAssist
Codewars
Duolingo
Projects by Code School
Codechef
HackerRank
AlgoExpert.io
CodeForces
LeetCode
Coderbyte
Interview Cake
Codewars
CodeCityApp turns coding practice into a daily quest loop: 1,551+ challenges across 13 language tracks, XP, streaks, ARIA AI mentor hints, 1v1 Arena battles, and a city that grows as your skills grow. It is built for learners who want momentum instead of tutorial hell: solve real challenges, learn to direct AI, catch mistakes, build your first agent, and see progress become visible.
CodeChef is a not-for-profit educational initiative started by Directi more than a decade ago. We started with a dream of seeing an Indian team winning a gold medal at the ACM ICPC World Finals. In its quest for the same, CodeChef has built a self-driven community of the world's best programmers. Today more than 1.3 million competitive programmers from 180+ countries learn from CodeChef. CodeChef has been hosting monthly programming contests regularly for 10 years now. Its platform has assessed 92 million+ code submissions to date, and over 30000 organizations are being impacted by CodeCheffers worldwide. It also organizes SnackDown - one of the world's largest global programming competition whose last edition drew participation from 140+ countries. Since 2017, CodeChef has started providing India's only industry-ready certification in Data Structures and Algorithms, and 1800+ programmers have been certified under the same.
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CodecityApp's answer
CodecityApp's answer
Codecademy teaches. LeetCode tests. CodecityApp builds habit. The city-building mechanic creates intrinsic motivation โ your skyline grows as your skills grow. Free forever with no meaningful limits, plus an AI mentor included. Competitors charge $20-40/month for less engagement.
CodecityApp's answer
Self-taught developers and CS students who struggle to stay consistent with coding practice. Also bootcamp students who need structured challenge-based learning, and universities looking for supplementary practice tools for their CS programs.
CodecityApp's answer
Built by Michael Clarke, a 50-year-old solo founder and ex-enterprise architect who got tired of boring coding practice. Every existing platform felt like homework. He built CodecityApp to make daily practice feel like progress โ city-building as the metaphor for skill-building. Week 9 of launch, pre-revenue, building in public.
CodecityApp's answer
React, TypeScript, Vite, Tailwind CSS, Supabase (backend + auth), Anthropic API (Claude powers ARIA), Judge0 (code execution), Lovable (frontend development), EAS Build (mobile).
Based on our record, Codechef should be more popular than CodecityApp. It has been mentiond 7 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Practice this concept interactively on CodeCityApp โ free trial at codecityapp.com. - Source: dev.to / 14 days ago
Have you heard of codeforces.com, atcoder.jp, codechef.com, etc? Source: over 2 years ago
Leetcode is good to learn basic algorithms because problem statements are usually straightforward. Competitive programming has much wider range of problems. Most popular sites for cp are codeforces.com , atcoder.jp, codechef.com . Source: over 2 years ago
Learn Java with hands-on experience. I personally used codingbat.com a lot, but I've heard good things about codechef.com, which appears to even have a competitive option. Source: over 3 years ago
For practicing algorithms, use any of the freely available websites like https://hackerrank.com https://codechef.com https://projecteuler.net A structured set of practice problems are available at https://www.interviewbit.com/courses/programming/ Avoid https://geeksforgeeks.org because it has a ton of material but very poor quality control. Source: about 4 years ago
These all have sample problems to solve Hackerrank.com edabit.com codewars.com codechef.com and there are tons more. Best of luck to you. I am at about the same level myself. I really like these sites. Source: over 4 years ago
CoderAssist - Unlimited software development services for your projects.
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Codewars - Achieve code mastery through challenge.
AlgoExpert.io - A better way to prep for tech interviews
Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
CodeForces - Programming competitions and contests, programming community.