Coders Gym vs BigO Algorithms
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Coders Gym
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Coders Gym puts coding practice in your pocket. Whether you're prepping for coding interviews or sharpening your skills, this app gives you everything you need to practice on the go. DAILY CHALLENGES Start each day with daily challenge, complete with a countdown timer and one-tap access to solve. BUILT-IN CODE EDITOR Write, run, and submit code directly from your phone. Features syntax highlighting, monospace fonts, multiple programming languages, and customizable themes including Monokai, Dracula, and Nord. EXPLORE 3000+ PROBLEMS Browse the full LeetCode problem library. Filter by difficulty, topic tags, and sort by acceptance rate or problem number. TRACK YOUR PROGRESS View your solve stats, contest ratings, global ranking, and submission history all in one place. CODING TOOLKIT - Upcoming Contests with reminders - Curated Problem Sheets (Blind 75, NeetCode 150, etc.) - Bookmarked problem lists - Community discussions and solutions - Coding experience playground DARK THEME A polished dark interface designed for comfortable, focused coding sessions. FREE TO USE All features are available for free. Coders Gym is an unofficial companion app and is not affiliated with LeetCode. All problem content is provided by LeetCode's public API.
BigO Algorithms
This app provides a technical environment for software engineers and computer science students to prepare for interviews. It uses AI-powered mentorship and visual complexity curves to help users understand logic and analyze code errors.
- AI-powered mentorship
- Dual-clue analysis (Static Blueprints & OpenAI)
- Big O complexity curve visualization
- Dark-mode first aesthetic
- Code error analysis
- Logic-focused learning
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BigO Algorithms is the definitive technical environment for software engineers and computer science students preparing for high-stakes technical interviews. Inspired by engineering blueprints and mathematical animations, the platform features a "dark-mode first" aesthetic where Big O complexity curves trace your progress and the UI functions like a technical datasheet for structural understanding. The system prioritizes logic over memorization through an AI-powered mentorship program that utilizes dual-clue "Static Blueprints" and dynamic, context-aware OpenAI insights to analyze specific code errors. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: BigO Algorithms at none against Coders Gym's shown. Coders Gym's advantage is iOS requirement (13.0 vs 18.6). On price, in-app purchases 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. Coders Gym sells 3 one-off in-app purchases and BigO Algorithms sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Coders Gym | BigO Algorithms |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | — | Fortnightly |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 50 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Shilpee Haldar | Gregori Farias |
In-app purchases
Coders Gym
- Small Tip$1.99
- Medium Coffee Tip$4.99
- Large Coffee$9.99
BigO Algorithms
- BigO Premium Monthly$7.991 Month
- BigO Premium Annual$57.991 Year





