Comparison

Data Engineer Cert Prep vs Data Engineer Pro Prep

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

Head to head
About

Data Engineer Cert Prep

Features
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Pass the AWS Certified Data Engineer – Associate (DEA-C01) exam with a native, offline-first practice app built around real exam scenarios across every domain of the current exam. WHY THIS APP Most Data Engineer quiz apps are thin question dumps with no explanations or a domain mix that doesn't match the real exam. This one is built and weighted to the official DEA-C01 exam guide, and every question — not just the answer key — comes with a full explanation of why the right choice is right and the others are wrong. WHAT'S INCLUDED (FREE) - 100 exam-style questions weighted to match the official DEA-C01 domain breakdown - Every question comes with a detailed explanation referencing official AWS documentation - Choose 5, 10, or 15 questions per practice session - Track your progress, streaks, and score history right on your device - Works fully offline- study on a plane, a commute, anywhere - No account, no sign-up, no ads - The first 100 questions are free. One in-app purchase unlocks all 150 in this app, with no subscription. EXAM DOMAINS COVERED - Data Ingestion and Transformation (34%) - Kinesis, MSK, Glue ETL, DMS, Firehose, EventBridge, MWAA, Lambda - Data Store Management (26%) - S3, Redshift, DynamoDB, Aurora, Lake Formation, OpenSearch, Iceberg/Glue Data Catalog - Data Operations and Support (22%) - CloudWatch, Step Functions, EMR, Glue Data Quality, AWS Batch, Amazon Q Developer - Data Security and Governance (18%) - IAM least privilege, Lake Formation permissions, KMS, Macie, VPC endpoints BUILT FOR REAL STUDYING Every question is written as a scenario a working data engineer would actually face, with distractor answers that test common misconceptions rather than obvious wrong picks. Explanations cite the relevant AWS service behavior directly so you learn the reasoning, not just memorize a letter. WANT MORE? Djamgatech PRO bundles a bigger 150-question Data Engineer Associate bank alongside dozens of other AWS, Azure, GCP, and AI certification question banks in one app - all offline, all ad-free. Start practicing for free today and walk into your DEA-C01 exam ready.

About

Data Engineer Pro Prep

Features
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This application is an independent exam preparation resource and is not affiliated with, endorsed by, sponsored by, or associated with Google LLC or any of its subsidiaries. GCP-DPE (Google Cloud Professional Data Engineer) is a registered trademark of Google LLC. Prepare confidently for the Google Professional Data Engineer (GCP-DPE) exam. GCP-DPE Practice provides hundreds of carefully crafted practice questions. ā—† COMPREHENSIVE COVERAGE • practice sets covering all exam domains ā—† REALISTIC EXAM EXPERIENCE • Timed practice mode simulating the 120-minute exam • Single and multiple-choice questions in exam format • Exam readiness score to track your progress ā—† SMART STUDY TOOLS • Detailed explanations for every question • Spaced-repetition flashcards powered by FSRS algorithm • Bookmarks for quick review • Personal notes on any question • Per-domain accuracy to identify weak areas ā—† MULTILINGUAL • Available in English, Japanese, Korean, German, and Portuguese ā—† PRIVACY & OFFLINE • Works completely offline — no internet required • No ads, no tracking Start with free practice sets. Unlock all sets with a one-time purchase.

Screenshots

Data Engineer Cert Prep3 screens
Data Engineer Pro Prep4 screens

Verdict

The call

The clearest difference is update cadence: Data Engineer Pro Prep at every 3 weeks against Data Engineer Cert Prep's every 2 months. Data Engineer Pro Prep also leads on iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Data Engineer Cert Prep sells 1 one-off in-app purchase and Data Engineer Pro Prep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Data Engineer Cert Prep ships an update every 2 months, Data Engineer Pro Prep every 3 weeks. The most recent releases landed on November 12, 2026 and November 13, 2026 respectively.

Scorecard2 real differences Ā· 4 level
Data Engineer Cert Prep versus Data Engineer Pro Prep: the parameters behind the verdict, then further details
ParameterData Engineer Cert PrepData Engineer Pro Prep
PriceFreeFree
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, MaciPhone, iPad, iPod, Mac — better
Requires iOS16.013.0 — better
Further details — not scored
Size1 MB86 MB
Age rating4+4+
DeveloperDjamgaTech CorpAITYTECH

In-app purchases

1 purchases

Data Engineer Cert Prep

One-time1
  • 50 More Questions$4.99
1 purchases

Data Engineer Pro Prep

One-time1
  • Premium - Lifetime$3.99

Questions

Is Data Engineer Cert Prep free?
Data Engineer Cert Prep is free to download, with in-app purchases available.
Is Data Engineer Pro Prep free?
Data Engineer Pro Prep is free to download, with in-app purchases available.
Do Data Engineer Cert Prep or Data Engineer Pro Prep have ads?
Neither Data Engineer Cert Prep nor Data Engineer Pro Prep shows ads.
Which is updated more often, Data Engineer Cert Prep or Data Engineer Pro Prep?
Data Engineer Cert Prep ships an update every 2 months, and Data Engineer Pro Prep every 3 weeks. Most recently, Data Engineer Cert Prep was updated on November 12, 2026 and Data Engineer Pro Prep on November 13, 2026.

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