Comparison

1Z0 vs Java SE 21 Developer

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

Head to head
About

1Z0

Features
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1Z0-808 practice tests for the Oracle Java SE 8 Programmer I (OCA) exam. Why ExamCert.App ? Online Mock Exam (Just like a real exam) Up-to-date questions, reviewed and refreshed regularly. Lifetime access & lifetime updates Quality Question with explanation (Just like real questions) 24/7 Chat & Email Support Ready to Pass 1Z0-808 - Oracle Certified Associate Java SE 8 Programmer I? Domain 1 β€” Java Basics Domain 2 β€” Working With Java Data Types Domain 3 β€” Using Operators and Decision Constructs Domain 4 β€” Creating and Using Arrays Domain 5 β€” Using Loop Constructs Domain 6 β€” Working with Methods and Encapsulation Domain 7 β€” Working with Inheritance Domain 8 β€” Handling Exceptions Domain 9 β€” Working with Selected Classes from the Java API WHY CHOOSE OUR APP? 1000+ Practice Questions - Expertly crafted questions covering all exam objectives Detailed Explanations - Understand the "why" behind every answer Multiple Question Types - Single choice, multiple choice, drag-and-drop, and more Offline Mode - Study anywhere, anytime without internet connection Progress Tracking - Monitor your improvement with detailed statistics Study Guide - Comprehensive reading materials for each exam domain Daily Reminders - Stay on track with customizable study notifications STUDY MODES Practice Mode - Learn at your own pace with instant feedback Exam Simulation - Timed tests that mirror the real exam experience Review Mode - Focus on questions you've answered incorrectly Bookmarks - Save difficult questions for later review Performance Analytics - Track your readiness across all domains PREMIUM FEATURES Unlock the full potential of your exam preparation with Premium access: β€’ Access to ALL 1000+ practice questions β€’ Complete Study Guide with in-depth explanations β€’ Unlimited exam simulations β€’ Priority updates with new questions SUPPORT Have questions or feedback? Contact us at support@examcert.app Privacy Policy: https://www.examcert.app/privacy Terms of Service: https://www.examcert.app/terms DISCLAIMER All content provided in this application is for educational and practice purposes only. The practice questions and study materials are designed to help candidates prepare for the 1Z0-808 - Oracle Certified Associate Java SE 8 Programmer I certification exam and do not represent actual exam questions from Oracle. This app does not guarantee that users will pass the 1Z0-808 exam. Exam results depend on individual preparation, experience, and understanding of the subject matter. All trademarks, service marks, trade names, and logos referenced herein belong to their respective owners. Any reference to Oracle, 1Z0-808, or related certification programs is purely for descriptive purposes. By using this application, you acknowledge and agree that the developers are not responsible for any exam outcomes or certification decisions made by Oracle. This application is an independent exam preparation resource and is not affiliated with, endorsed by, sponsored by, or associated with Oracle Corporation or any of its subsidiaries. 1Z0-808 (Java SE 8 Programmer I) is a registered trademark of Oracle Corporation.

About

Java SE 21 Developer

Features
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Keep studying across your phone, tablet and desktop. Use your phone on the move and a tablet or desktop when you want more room to study. Connect the same StudyCert account to continue your learning in the app and on the desktop web. Prepare for Oracle Java SE 21 / 1Z0-830 with 500 practice questions and 149 key terms. Study coverage Β· 10 areas β€’ Handling Date, Time, Text, Numeric and Boolean Values β€’ Controlling Program Flow β€’ Using Object-Oriented Concepts in Java β€’ Handling Exceptions β€’ Working with Arrays and Collections β€’ Working with Streams and Lambda expressions β€’ Packaging and Deploying Java Code β€’ Managing Concurrent Code Execution β€’ Using Java I/O API β€’ Implementing Localization 1. Build your foundation with key terms Use flashcards to learn meanings, exam context and selection cues. Mark terms as known or not yet known, then revisit unstudied or unfamiliar cards. Edit card content to suit your learning and restore the original when needed. 2. Practice and understand each answer Study in 50-question sets, by domain or by difficulty. Work through single- and multiple-choice questions, then read the explanation for the answer and each option. Choose all, unfinished or wrong questions; shuffle questions and choices; use a study timer; and resume where you left off. From the results of domain study, continue with key terms and related questions in the next domain. 3. Review mistakes and uncertain concepts Choose recent errors, review marks or repeated mistakes on the Review screen and practice them again. Check accuracy by domain alongside the terms you know or still need to learn. The glossary report shows term-learning status and accuracy on related questions together. 4. Check your preparation with a mock exam Practice time management with 50 questions in 120 minutes. Change answers before submission, resume a saved exam and receive grading when time expires. Afterwards, see correct, wrong and unanswered counts, your score and domain results, then revisit mistakes. This practice feature uses the included questions and does not determine an official exam score or pass result. Tools that fit your study routine Optional audio study reads terms and meanings aloud. Choose whether to include exam context and selection cues, set repeats and pauses, and control playback with the mini player. In the mobile app, audio can continue in the background and with the screen locked. A study calendar, learning streaks, weekly goals, reminders for unmet goals and light, dark or system themes support your routine. Learning records are managed for each supported language. Some features require paid access. Check the included features and price on the purchase screen. Purchase restoration is supported. This is an independent study aid, not an official, affiliated or endorsed app of any exam administrator or certification body. Exam names and trademarks belong to their respective owners.

Screenshots

1Z04 screens
Java SE 21 Developer4 screens

Verdict

The call

The clearest difference is update cadence: Java SE 21 Developer at weekly against 1Z0's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

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

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

Both are free to download. 1Z0 sells 2 one-off in-app purchases and Java SE 21 Developer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

1Z0 ships an update every 3 weeks, Java SE 21 Developer weekly. Both last shipped on November 13, 2026.

Scorecard1 real difference Β· 5 level
1Z0 versus Java SE 21 Developer: the parameters behind the verdict, then further details
Parameter1Z0Java SE 21 Developer
PriceFreeFree
Update frequencyEvery 3 weeksWeekly β€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 β€” better15.1
Further details β€” not scored
Size45 MB233 MB
Age rating4+4+
DeveloperEXAMCERT PTY LTDCHOI SEONGMIN

In-app purchases

2 purchases

1Z0

One-time2
  • 200 AI Credits$1.99
  • Unlock Premium$5.99
1 purchases

Java SE 21 Developer

One-time1
  • Lifetime Access$4.99

Questions

Is 1Z0 free?
1Z0 is free to download, with in-app purchases available.
Is Java SE 21 Developer free?
Java SE 21 Developer is free to download, with in-app purchases available.
Do 1Z0 or Java SE 21 Developer have ads?
Neither 1Z0 nor Java SE 21 Developer shows ads.
Which is updated more often, 1Z0 or Java SE 21 Developer?
1Z0 ships an update every 3 weeks, and Java SE 21 Developer weekly. Most recently, 1Z0 was updated on November 13, 2026 and Java SE 21 Developer on November 13, 2026.

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