CodeForces
LeetCode
Codechef
AlgoExpert.io
Project Euler
Interview Cake
interviewing.io
CodingInterview
CodecityApp
CoderAssist
Codewars
Duolingo
Projects by Code School
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.
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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, CodeForces seems to be a lot more popular than CodecityApp. While we know about 82 links to CodeForces, we've tracked only 1 mention of CodecityApp. 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.
Your preparation should not be random. Platforms like LeetCode, Codeforces, and GeeksforGeeks are toolsโbut what matters is how you use them. - Source: dev.to / 4 months ago
Most people who do competitive programming have moved to: . - Source: Hacker News / 7 months ago
At first, the problems on platforms like Codeforces felt overwhelming. But after a few rounds, I realized something important:. - Source: dev.to / 11 months ago
Check it out and start competing today: https://codeforces.com/. - Source: dev.to / 11 months ago
The researchers created their dataset from CodeContests and public Codeforces solutions, enriched with metadata. For supervised fine-tuning, they structured the data as prompt-completion pairs, using problem statements as prompts and solutions as completions. The balanced dataset contained 1.2 million samples, each averaging 1,500 tokens. - Source: dev.to / over 1 year ago
Practice this concept interactively on CodeCityApp โ free trial at codecityapp.com. - Source: dev.to / 13 days ago
LeetCode - Practice and level up your development skills and prepare for technical interviews.
CoderAssist - Unlimited software development services for your projects.
Codechef - CodeChef is a not-for-profit educational initiative by Directi, an Indian software company. It is a global programming community that fosters learning and friendly competition, built on top of the worldโs largest competitive programming platform.
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.