Comparison

DevPrep vs AI ML Prep

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

Head to head
About

DevPrep

Features
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You have the coding skills, but can you explain them clearly under pressure? DevPrep is the Offline-First AI Interview Coach designed specifically for Software Engineers. Stop practicing in your head. Start speaking. DevPrep simulates the pressure of a real interview, records your answer, and uses an advanced on-device AI engine to grade your response against ideal technical answers. WHY DEVPREP? โ€ข AI GRADING ENGINE: Our local vector-based AI analyzes your speech for technical accuracy, logic, and clarity. Get a score (0-100) instantly. โ€ข PRIVACY & FAST: All grading happens securely on your device. Your voice recording is processed locally. โ€ข ZERO FLUFF: 250+ curated questions from the current tech industry standards. 5 SPECIALIZED TRACKS: - SOFT SKILLS & LEADERSHIP - DATA STRUCTURES & ALGORITHMS (pro) - SYSTEM DESIGN ARCHITECT (pro) - MODERN FRONTEND ENGINEERING (pro) - BACKEND & DISTRIBUTED SYSTEMS (pro) FEATURES: - Realistic "Interviewer" Audio to simulate pressure. - "Silent Mode" for practicing on the go (multi-choice questions). - Local progress feature to track your mastery. - Offline-First architecture (Privacy focused).

About

AI ML Prep

Features
Read full description

Ace your AI and Machine Learning system design interviews with 226 questions used at top tech companies, including Google, Meta, Amazon, and more. Each question includes a structured expert answer, skill tags, and a 5-dimension rubric so you know exactly what interviewers look for: - Problem Framing - Technical Depth - System Thinking - Communication - Tradeoff Awareness Domains covered: - Recommendation Systems - NLP, LLMs, and Generative AI - Search and Ranking - Computer Vision - MLOps and Infrastructure - Fraud and Anomaly Detection - Ads and Click Prediction - Reinforcement Learning and Decision Systems - AI Agents and Content Safety How it works: 1. Get a daily question and build your streak 2. Think through your answer, then tap to reveal the expert answer 3. Record your answer with voice and score yourself on each rubric dimension 4. Mark questions as mastered as you improve Mock Interviews (Pro): Simulate a real ML system design interview with: - Quick Fire (15 minutes) - Standard Round (45 minutes) - Full Loop (90 minutes) You can focus on a specific domain or choose a random mix. Free tier: The first 4 easy questions in each domain are free. No time limit and no account required. Pro subscription: Unlock all 226 questions across all difficulty levels, plus: - Mock interviews - Company-specific filters - Voice practice recording Monthly and yearly plans are available. Built for ML engineers, data scientists, AI/LLM engineers, and computer science students preparing for FAANG and AI-first companies. Privacy Policy: https://lemon-tea-ai.github.io/aiml-interview-prep-legal/privacy/ Terms and Conditions: https://lemon-tea-ai.github.io/aiml-interview-prep-legal/terms/

Screenshots

DevPrep4 screens
AI ML Prep4 screens

Verdict

The call

The clearest difference is iOS requirement: DevPrep at 15.1 against AI ML Prep's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. DevPrep sells 5 one-off in-app purchases and AI ML Prep sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference ยท 5 level
DevPrep versus AI ML Prep: the parameters behind the verdict, then further details
ParameterDevPrepAI ML Prep
PriceFreeFree
Update frequencyEvery 2 daysโ€”
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS15.1 โ€” better17.0
Further details โ€” not scored
Size149 MB5 MB
Age rating4+4+
DeveloperThieu KhueKe Zhu

In-app purchases

5 purchases

DevPrep

One-time5
  • Backend Scale pack$9.99
  • Data Structure & Algorithms pack$9.99
  • System Design pack$9.99
Show 2 more
  • Frontend Engineering pack$9.99
  • Unlock all Pro Packs$29.99
2 purchases

AI ML Prep

Subscriptions2
  • AI ML Prep Pro - Monthly$9.991 Month
  • AI ML Prep Pro - Yearly$99.991 Year

Questions

Is DevPrep free?
DevPrep is free to download, with in-app purchases available.
Is AI ML Prep free?
AI ML Prep is free to download, with in-app purchases available.
Do DevPrep or AI ML Prep have ads?
Neither DevPrep nor AI ML Prep shows ads.

Other comparisons