Comparison

CLF vs Sapling Isle

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

Head to head
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.

About

Sapling Isle

Features
Read full description

Sapling Isle is a multilingual interactive science lab that connects observable phenomena with advanced scientific concepts on iPhone and iPad. Change variables directly, observe how a system responds, read graphs and measurements, then explore the equations, assumptions, and limits behind the model. Explore nature and the universe • Control a 3D Solar System and observe planetary motion and astronomical time • Follow curved light, an accretion disk, and Einstein rings around a black hole Enter a hands-on physics lab • Explore forces, motion, heat, energy, magnetic fields, light, and atoms • Compare heating, compression, and diffusion in a 3D microscopic world • Investigate orbits, waves, entropy, Boltzmann distributions, quantum tunneling, and double-slit patterns Explore at your own depth • Start with direct manipulation and visual feedback • Continue with multivariable comparisons, measurements, and graphs • Go deeper into equations, approximations, and model boundaries • Choose from 10 interface languages • Adaptive layouts for both iPhone and iPad • No account, advertising, or cross-app tracking • Progress, camera frames, and experiment data are handled primarily on device Pick an island, begin with a phenomenon, and follow the evidence toward deeper models.

Screenshots

CLF3 screens
Sapling Isle4 screens

Verdict

The call

The clearest difference is in-app purchases: Sapling Isle at none against CLF's 3. Sapling Isle also leads on update cadence (fortnightly vs every 2 months). CLF's advantage is iOS requirement (15.0 vs 18.0). On price, ads 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. CLF sells 3 in-app purchases, starting at $3.99 per month. Sapling Isle asks for nothing beyond the download.

UpkeepUpdate frequency

CLF ships an update every 2 months, Sapling Isle fortnightly. The most recent releases landed on September 25, 2026 and September 10, 2026 respectively.

Scorecard3 real differences Ā· 3 level
CLF versus Sapling Isle: the parameters behind the verdict, then further details
ParameterCLFSapling Isle
PriceFreeFree
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size27 MB40 MB
Age rating4+4+
DeveloperDavy Raitt大鹏 张

In-app purchases

3 purchases

CLF

Subscriptions2
  • Pro Monthly$3.991 Month
  • Pro Yearly7 Days trial$14.991 Year
One-time1
  • Pro Lifetime$19.99
None

Sapling Isle

No in-app purchases

Questions

Is CLF free?
CLF is free to download, with in-app purchases available.
Is Sapling Isle free?
Sapling Isle is free to download, with no in-app purchases.
Do CLF or Sapling Isle have ads?
Neither CLF nor Sapling Isle shows ads.
Which is updated more often, CLF or Sapling Isle?
CLF ships an update every 2 months, and Sapling Isle fortnightly. Most recently, CLF was updated on September 25, 2026 and Sapling Isle on September 10, 2026.

Other comparisons