Comparison

Solar PV Exam Revision vs CLF

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

Head to head
About

Solar PV Exam Revision

Learn and test your knowledge of over 500 UK road and traffic signs. This app is essential for new drivers preparing for their theory test and beneficial for all road users to enhance safety.

Highlights
  • Study over 500 road signs
  • Cover flow interface
  • Quiz yourself
  • Prepare for theory test
  • Track progress
  • Re-attempt incorrect questions
Features
Read full description

Solar PV and battery storage, from the exam to the install. Solar PV Exam Revision is a complete study and field companion for anyone working with domestic and commercial solar PV and electrical energy storage systems in the UK — installers, designers, electricians, assessors, and anyone preparing for a renewables certification. EXAM REVISION — 714 QUESTIONS • 19 topics across three sections: Shared Requirements, Energy Storage, and Solar PV • Every answer carries a written explanation citing its source — the IET Codes of Practice, BS 7671, or the MCS standards • Flash cards for fast recall, with self-rating • Timed mock exams drawing 30 questions from across the whole bank • Progress tracked per topic, plus a full history of every attempt • Voice-over, so you can revise hands-free TEN FIELD CALCULATORS • PV String Sizing • Inverter Sizing Ratio • Battery Sizing & Autonomy • Export Limitation Check (G98 / G99 / G100) • Cable Sizing • Voltage Drop • Adiabatic (CPC size) • Prospective Fault Current • R1 + R2 • Ohm's Law / Power Every result exports to PDF. 229 QUICK REFERENCE CARDS Earthing and bonding, the DC commissioning sequence, grid connection, isolation and switching, labels and signage, and MCS duties — all searchable, and all stored on the device so they work on site with no signal. FIELD TOOLS • DNO Connection — work out the G98 / G99 / SGI route • Earthing & PME — PME and TT decision tool • MCS Certification Duties — MIS 3002 / 3012 contractor duties • Commissioning records and site surveys, exported as PDF • CPD logger, tracking hours against your goals Free to download and try. A subscription unlocks the full 714-question bank, all ten calculators, every reference card, unlimited records, and PDF exports without a watermark. Privacy Policy: https://www.batterystorageprep.co.uk/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

CLF

Features
Read full description

PASS YOUR AWS CERTIFIED CLOUD PRACTITIONER EXAM Master AWS cloud fundamentals with 600+ practice questions designed to build real exam confidence and help you pass on your first attempt. 600+ practice questions 5-minute study sessions Track your progress Remove mastered questions Text-to-speech support Dark mode available WHY GET CERTIFIED? The AWS Certified Cloud Practitioner is the foundational credential that validates your understanding of AWS cloud services and positions you for career growth in one of the most in-demand areas of technology. Whether you are pivoting into cloud or strengthening your existing IT career, this certification signals credible cloud fluency to employers worldwide. WHAT YOU'LL MASTER: • AWS Shared Responsibility Model • EC2 Purchasing Options and Compute Fundamentals • S3 Storage Classes and Lifecycle Policies • Cloud Migration Strategies and the 7 Rs • AWS Support Plans and Trusted Advisor • IAM Policies, Roles, and Root User Security • VPC, Security Groups, NACLs, and Direct Connect • AWS Well-Architected Framework • Cloud Financial Management and Billing Tools • Cost Allocation Tags and Consolidated Billing • Serverless Services including Lambda and Fargate • ECS and Container-Based Compute • Database Services including RDS, DynamoDB, and ElastiCache • Security Services including GuardDuty, AWS Config, CloudHSM, Shield, and WAF • CloudFront, Regions, Edge Locations, and Global Infrastructure STUDY ANYWHERE: Coffee breaks. Commutes. Lunch hours. Turn dead time into Cloud expertise. Download now. Pass your exam. Master Cloud.

Screenshots

Solar PV Exam Revision4 screens
CLF3 screens

Verdict

The call

Solar PV Exam Revision and CLF are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Solar PV Exam Revision sells 4 in-app purchases, starting at $9.99 per month and CLF sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Solar PV Exam Revision ships an update every 5 weeks, CLF every 2 months. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

ScorecardNo meaningful differences
Solar PV Exam Revision versus CLF: the parameters behind the verdict, then further details
ParameterSolar PV Exam RevisionCLF
PriceFreeFree
Positive reviews77.8% of reviews—
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size26 MB27 MB
Age rating4+4+
DeveloperEknath KadamDavy Raitt

In-app purchases

4 purchases

Solar PV Exam Revision

Subscriptions4
  • Monthly$9.991 Month
  • Quarterly$19.993 Months
  • 6 Months$24.996 Months
Show 1 more
  • Yearly$39.991 Year
3 purchases

CLF

Subscriptions2
  • Pro Monthly$3.991 Month
  • Pro Yearly7 Days trial$14.991 Year
One-time1
  • Pro Lifetime$19.99

Questions

Is Solar PV Exam Revision free?
Solar PV Exam Revision is free to download, with in-app purchases available.
Is CLF free?
CLF is free to download, with in-app purchases available.
Do Solar PV Exam Revision or CLF have ads?
Neither Solar PV Exam Revision nor CLF shows ads.
Which is updated more often, Solar PV Exam Revision or CLF?
Solar PV Exam Revision ships an update every 5 weeks, and CLF every 2 months. Most recently, Solar PV Exam Revision was updated on November 6, 2026 and CLF on October 30, 2026.

Other comparisons