Comparison

Interview Master vs Professional Data Engineer

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

Head to head
About

Interview Master

Practice data science interviews with AI-powered simulations and daily quizzes. Receive instant feedback on your answers and track your progress to build confidence and deepen your understanding of complex topics.

Highlights
  • Real-time AI interview simulations
  • AI-evaluated daily quizzes
  • Instant feedback on answers
  • Progress tracking
  • Detailed question explanations
  • Community sharing features
Features
Read full description

Get Ready for Interview Master: Data Science – Now with Real-Time AI Interviews and Daily Quizzes! Prepare for your data science interviews while having fun with our AI-powered app. Now you can practice in two powerful ways: Real-Time Interview Mode: Simulate real interviews with AI, speak naturally, and receive instant feedback on your answers — just like a real recruiter session. AI-Evaluated Daily Quizzes: Solve new questions every day across all skill levels, from beginner to expert. Improve your problem-solving skills, strengthen your communication, and build confidence with every session. After completing 15 questions, evaluate your level with OpenAI-powered insights that highlight weak points and show you exactly how to improve. What You’ll Love About the App Consistent Learning: Engage with diverse questions and daily practice to stay sharp and continuously improve your readiness for real interviews. For Everyone: Questions range from easy to hard, suitable for learners at any level. Track Your Progress: See how you’re improving and identify areas that need attention. Deepen Your Understanding: Get detailed explanations for every question to strengthen your grasp of complex topics. Real-Time Interview Feedback: Experience simulated interviews and gain personalized, AI-driven suggestions to enhance your communication and technical skills. Join the Community: Share your achievements, progress, and tips with other learners preparing for data science interviews. Expert-Crafted Content: Our quizzes and interviews are designed to reflect real-world data science challenges. Start Your Daily Learning Journey Download now and make learning part of your everyday routine. Step up your game for data science interviews and join a global community of learners just like you. Ready to challenge yourself? Download Interview Master: Data Science today!

About

Professional Data Engineer

Features
Read full description

Non-Affiliation Disclaimer (Google Professional Data Engineer) This app is an independent exam preparation resource and is not affiliated with, endorsed by, or connected with Google or Google Cloud. All practice materials are created solely for learning and study purposes. Trademark Notice (Google Professional Data Engineer) Google, Google Cloud, and Google Cloud Professional Data Engineer are trademarks or registered trademarks of Google LLC.
Any references to Google Cloud exams or terminology are for identification only and do not imply official endorsement. ===== There are many questions on the web that are either outdated or wrongly answered. I am trying here to filter all those questions and provide you with a nice tool to practice the exam similar to the real-life exam as much as possible. This small app was designed with love to help you 5 things: 1. question content is updated monthly in 2026, so you don’t have to worry that these question is outdated anymore. 2. With 2 EXACT-FILTERING features, you can focus easily on questions you are making mistakes or missing. 3. Save difficult questions offline. So you can practice them later when you have free time. 4. Examination mode will help you take test like a real exam. So you will be more confident. 5. NEARLY-100% questions are packed with straightforward explanations. You will know why it is correct or wrong. No more confusing. In sum, this app is simple and straight-to-the-point like description you are reading. Have fun and enjoy the app!

Screenshots

Interview Master4 screens
Professional Data Engineer4 screens

Verdict

The call

The clearest difference is update cadence: Interview Master at fortnightly against Professional Data Engineer's every 13 months. Professional Data Engineer's advantage is iOS requirement (10.0 vs 12.0). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Interview Master sells 1 in-app purchase, starting at $3.99 per month and Professional Data Engineer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Interview Master ships an update fortnightly, Professional Data Engineer every 13 months. The most recent releases landed on June 9, 2026 and September 21, 2026 respectively.

Scorecard2 real differences · 8 level
Interview Master versus Professional Data Engineer: the parameters behind the verdict, then further details
ParameterInterview MasterProfessional Data Engineer
PriceFreeFree
Rating4.8 (8 ratings) — better—
Positive reviews87.5% of reviews—
Number of ratings8 — better—
Update frequencyFortnightly — betterEvery 13 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.010.0 — better
Further details — not scored
Size36 MB25 MB
Age rating4+4+
DeveloperWowso Inc.Trieu Tran

In-app purchases

1 purchases

Interview Master

Subscriptions1
  • IM: Data Science$3.991 Month
1 purchases

Professional Data Engineer

One-time1
  • Unlock complete App$9.99

Questions

Is Interview Master free?
Interview Master is free to download, with in-app purchases available.
Is Professional Data Engineer free?
Professional Data Engineer is free to download, with in-app purchases available.
Do Interview Master or Professional Data Engineer have ads?
Neither Interview Master nor Professional Data Engineer shows ads.
Which is updated more often, Interview Master or Professional Data Engineer?
Interview Master ships an update fortnightly, and Professional Data Engineer every 13 months. Most recently, Interview Master was updated on June 9, 2026 and Professional Data Engineer on September 21, 2026.

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