Comparison

API653 Storage Tank Inspector vs KeenIELTS

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

Head to head
About

API653 Storage Tank Inspector

Features
Read full description

Are you preparing for your API 653 Storage Tank Inspector certification exam? Equip yourself with the right tools and boost your confidence with the API 653 Storage Tank Inspector 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 you’re ready for test day. • API 653 Storage Tank Inspector Practice Test: • Auto-renewable subscription; • 1 month ($9,00); • Payment will be charged to iTunes Account at confirmation of purchase; • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period; • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal; • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase; • Privacy police: https://api653storagetankinspectorpracticetest.app.ambitionz.co/privacy • Terms of use: https://api653storagetankinspectorpracticetest.app.ambitionz.co/terms • Apple’s Standard End User License Agreement (EULA): https://apple.com/legal/internet-services/itunes/dev/stdeula • 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.

About

KeenIELTS

Prepare for your IELTS exam with comprehensive practice tests and AI-powered feedback on your writing and speaking. Track your progress with detailed score breakdowns and focus your studies effectively to achieve your target band score.

Highlights
  • Full-length practice tests (4 modules)
  • AI feedback on Writing and Speaking
  • Detailed band score tracking
  • Module-specific performance breakdown
  • Distraction-free test environment
  • Instant scoring for Listening
Features
Read full description

KeenIELTS is your all-in-one IELTS preparation app — built to help you reach your target band score with smarter practice and real AI feedback. WHAT YOU GET: • Full-length practice tests across all 4 modules — Listening, Reading, Writing, and Speaking • AI-powered feedback on your Writing and Speaking responses, just like a real examiner • Detailed band score tracking so you always know where you stand • Module-by-module performance breakdown to focus your study where it matters most • Clean, distraction-free test environment that mirrors the real IELTS exam WHY KEENIELTS: Most IELTS apps give you questions but no real feedback. KeenIELTS uses AI to analyse your actual responses — pointing out exactly what to improve, not just whether you got it right or wrong. Whether you're aiming for Band 6.5 for university admission or Band 8.0 for professional registration, KeenIELTS tracks your progress and helps you get there efficiently. MODULES COVERED: → Listening — Audio-based questions with instant scoring → Reading — Timed reading passages with full answer explanations → Writing — Submit Task 1 and Task 2 essays, receive detailed AI examiner feedback → Speaking — Record your responses and get AI-scored feedback on fluency, vocabulary, grammar, and pronunciation Start your free practice today and see exactly what your current band score is.

Screenshots

API653 Storage Tank Inspector4 screens
KeenIELTS4 screens

Verdict

The call

The clearest difference is in-app purchases: KeenIELTS at none against API653 Storage Tank Inspector's 1. KeenIELTS also leads on update cadence (every 4 days vs every 5 months). On price, ads, device support and iOS requirement 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. API653 Storage Tank Inspector sells 1 in-app purchase, starting at $9.00 per month. KeenIELTS asks for nothing beyond the download.

UpkeepUpdate frequency

API653 Storage Tank Inspector ships an update every 5 months, KeenIELTS every 4 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
API653 Storage Tank Inspector versus KeenIELTS: the parameters behind the verdict, then further details
ParameterAPI653 Storage Tank InspectorKeenIELTS
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 5 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size3 MB4 MB
Age rating4+4+
DeveloperAmbitionz AppsKevin Valani

In-app purchases

1 purchases

API653 Storage Tank Inspector

Subscriptions1
  • API 653 Storage Tank Inspector$9.001 Month
None

KeenIELTS

No in-app purchases

Questions

Is API653 Storage Tank Inspector free?
API653 Storage Tank Inspector is free to download, with in-app purchases available.
Is KeenIELTS free?
KeenIELTS is free to download, with no in-app purchases.
Do API653 Storage Tank Inspector or KeenIELTS have ads?
Neither API653 Storage Tank Inspector nor KeenIELTS shows ads.
Which is updated more often, API653 Storage Tank Inspector or KeenIELTS?
API653 Storage Tank Inspector ships an update every 5 months, and KeenIELTS every 4 days. Most recently, API653 Storage Tank Inspector was updated on October 28, 2026 and KeenIELTS on October 31, 2026.

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