Comparison

devdex vs Coding Interview

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

devdex

This app helps developers practice coding syntax for JavaScript, TypeScript, and Swift. It offers over 200 questions, tracks your progress with a weekly streak, and provides statistics on accuracy and quantity. Links to official language documentation are also included.

Highlights
  • JavaScript, TypeScript, Swift support
  • Over 200 practice questions
  • Weekly streak tracker
  • Accuracy and quantity statistics
  • Links to language documentation
Features
Read full description

v1.0 Features: - JavaScript, TypeScript, Swift - Over 200 questions - Weekly streak tracker - Accuracy and quantity stats - Links to language docs LICENSED APPLICATION END USER LICENSE AGREEMENT: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Coding Interview

Features
Read full description

Algo Mind turns abstract algorithms into something you can see. Every lesson pairs a step-by-step animated visualization with synced, highlighted code — you watch pointers move, trees grow, and tables fill in until the idea actually clicks. Stop memorizing solutions; learn the patterns behind them. WATCH ALGORITHMS THINK • 164 classic problems fully animated — play, pause, and step through at your own pace • Code highlighted in sync with the animation, line by line • A live memory view shows variables, pointers, and call frames as they change • Arrays, hash maps, linked lists, stacks, queues, binary trees, tries, heaps, graphs, matrices, DP tables, recursion stacks, sliding windows, and bit operations — one consistent visual language 1,576 PROBLEMS DEEP • The full interview canon, from Two Sum to hard dynamic programming • Solutions in four languages: Python, Java, Kotlin, and C++ • Plain-language explanations, worked examples, and time/space complexity for every problem • Filter by topic, difficulty, company, or your bookmarks — and track every solve A CLEAR PATH • Eight chapters from Foundations to interview-ready, picking up exactly where you left off • 21 animated cheatsheets with nearly 500 animated steps and predict-the-next-step quizzes — perfect for a fast review the night before an interview PRACTICE THAT STICKS • Quick 5, Daily Mix, weak-spot review, or build your own session by topic, difficulty, and company • Three question types: order the steps, true/false concept checks, and 176 fill-in-the-blank code puzzles • Timed Rank Mode for when you want a little pressure STAY ON TRACK • Daily streaks that count any learning activity • XP and per-topic progress tracking • Bookmarks and optional study reminders • Full dark mode • Core lessons work offline • No ads, ever START TODAY A selection of sample problems, puzzles, and cheatsheets is free. An optional Algo Mind Premium subscription unlocks the full library. Subscriptions renew automatically and can be managed in your App Store account settings. Privacy Policy: https://www.algomind.app/privacy.html Terms of Use: https://www.algomind.app/terms.html

Screenshots

devdex3 screens
Coding Interview4 screens

Verdict

The call

The clearest difference is ads: devdex at none against Coding Interview's shown. Coding Interview's advantage is update cadence (weekly vs every 3 weeks). On price, in-app purchases, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. devdex sells 2 in-app purchases, starting at $4.99 per month and Coding Interview sells 3 in-app purchases, starting at $22.00 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

devdex ships an update every 3 weeks, Coding Interview weekly. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 7 level
devdex versus Coding Interview: the parameters behind the verdict, then further details
ParameterdevdexCoding Interview
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 weeksWeekly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 — better16.0
Further details — not scored
Size41 MB93 MB
Age rating4+4+
DeveloperTrevor PenningtonMooshuroi Ltd

In-app purchases

2 purchases

devdex

Subscriptions2
  • Devdex Monthly$4.991 Month
  • Devdex - Yearly$34.991 Year
3 purchases

Coding Interview

Subscriptions3
  • AlgoMind Pro Monthly$22.001 Month
  • AlgoMind Pro Annual$69.001 Year
  • Algo Mind Pro Yearly1 Year trial$69.001 Year

Questions

Is devdex free?
devdex is free to download, with in-app purchases available.
Is Coding Interview free?
Coding Interview is free to download, with in-app purchases available.
Do devdex or Coding Interview have ads?
Coding Interview shows ads; devdex does not.
Which is updated more often, devdex or Coding Interview?
devdex ships an update every 3 weeks, and Coding Interview weekly. Most recently, devdex was updated on October 24, 2026 and Coding Interview on October 28, 2026.

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