CPEN Practice Test vs PDB Viewer
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
CPEN Practice Test
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Are you preparing for your CPEN certification exam? Equip yourself with the right tools and boost your confidence with the CPEN Practice Test app. Tailored to match the style and difficulty of the actual abc certification exams, this app offers everything you need to pass your exam. Key Features to Support Your Success - Three Exam Modes to Match Your Study Style: * Final Exam Mode: Simulate the real exam experience by answering a set of questions without feedback until the end. Receive a detailed score report, highlighting both correct and incorrect answers, so you can focus on areas needing improvement. * Practice Exam Mode: Immediate feedback with answers revealed after each question. Learn effectively as incorrect choices are marked in red and correct answers in green, allowing for a deeper understanding of the material. * Flashcard Exam Mode: Test your knowledge in a self-assessment format. Reveal answers at your own pace, perfect for strengthening recall and comprehension of key concepts. * Customizable Study Options: Study by Individual Categories: Concentrate on specific sections of the exam by choosing categories tailored to your needs. Allocate your study time more effectively to reinforce weaker areas. * Customizable Time Limits: Practice at your own speed or challenge yourself with real exam constraints. Adjust the time limits for each exam mode to simulate exam pressure or allow for thoughtful reflection. * Comprehensive and Up-to-Date Question Bank: Gain access to a robust set of questions covering essential topics. * Performance Tracking: Monitor your progress and identify strengths and areas for improvement with detailed performance reports. Tailor your study strategy based on your readiness and watch your scores improve over time. Who Should Use This App? * Students: Master the key concepts needed to pass the certification exam and achieve your educational goals. * Certification Candidates: Practice under exam conditions and track your progress to ensure youβre ready for test day. β’ CPEN Practice Test: β’ Auto-renewable subscription; β’ 1 month ($9,00); β’ Payment will be charged to iTunes Account at confirmation of purchase; β’ Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period; β’ Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal; β’ Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase; β’ Privacy police: https://cpenpracticetest.app.ambitionz.co/privacy β’ Terms of use: https://cpenpracticetest.app.ambitionz.co/terms β’ Appleβs Standard End User License Agreement (EULA): https://apple.com/legal/internet-services/itunes/dev/stdeula β’ Customizable Time Limits: Practice at your own pace or simulate real exam conditions by setting a custom time limit for each exam. This feature gives you full control over your study environment.
PDB Viewer
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PDB Viewer turns your phone into a molecular microscope. Search the entire Protein Data Bank and over 200 million AlphaFold predictions, then explore any protein, virus, drug, or DNA structure in interactive 3D β free, with no account, no ads, and no sign-up. WHERE THE MOLECULES COME FROM β’ RCSB Protein Data Bank β 200,000+ experimentally determined structures β’ AlphaFold β 200M+ AI-predicted protein models β’ SWISS-MODEL β template-based homology models β’ PubChem and ChEMBL β millions of drugs and compounds β’ Crystallography Open Database β small-molecule crystals β’ NCI/CADD resolver β type a chemical name and get a 3D model Every source is free and needs no API key. You can also open your own .pdb and .cif files. WAYS TO SEE IT β’ Five representations: wireframe, ball-and-stick, space-filling (CPK), cartoon/ribbon, and a smooth molecular surface β’ Color by element, chain, secondary structure, rainbow, or AlphaFold confidence (pLDDT) β’ Biological assemblies: rebuild an entire icosahedral virus capsid from a few deposited chains β’ NMR ensembles: overlay every model in the bundle to watch a protein flex β’ Automatic secondary-structure detection MADE FOR TOUCH β’ Rotate, pinch-zoom, and pan with smooth native rendering β’ Tap any atom to see its element, residue, and chain β’ Recently viewed structures are cached, so they reopen instantly and work offline For students, researchers, teachers, and the simply curious. PDB Viewer makes structural biology beautiful and accessible. Structures are provided by their respective databases. PDB Viewer is independent and not affiliated with or endorsed by the RCSB PDB, EMBL-EBI, or AlphaFold.
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Verdict
CPEN Practice Test and PDB Viewer are too close to call on the numbers: across 5 compared parameters β price, ads, in-app purchases and device support among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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
Both are free to download. CPEN Practice Test sells 1 in-app purchase, starting at $9.00 per month and PDB Viewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | CPEN Practice Test | PDB Viewer |
|---|---|---|
| Price | Free | Free |
| Update frequency | β | Monthly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod β better | iPhone, iPad |
| Requires iOS | 15.0 β better | 16.0 |
| Further details β not scored | ||
| Size | 3 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Ambitionz Apps | Qvyshift LLC |
In-app purchases
CPEN Practice Test
- CPEN Practice Test$9.001 Month
PDB Viewer
- PDB Viewer Pro$9.99
Questions
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Is PDB Viewer free?
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