Grand-screen employs a unique dual-rating approach that combines expert evaluation with user feedback, providing a comprehensive assessment of each app’s quality and value.
Understanding Our Ratings
Each app on Grand-screen receives two distinct scores:
Expert Score (0-10)
Our expert score is calculated using a weighted algorithm based on five key criteria, evaluated by our professional reviewers through extensive hands-on testing.
User Score (0-10)
The user score aggregates ratings from our community members who have downloaded and used the app, providing real-world perspective on app performance and satisfaction.
Expert Score Breakdown
The expert score is calculated using the following weighted formula:
Functionality (25% weight)
- Feature Completeness: Does the app deliver all promised features?
- Reliability: Do features work consistently without bugs or errors?
- Innovation: Does the app offer unique or exceptionally well-implemented features?
- Depth: Are features fully developed or just superficially implemented?
User Experience (25% weight)
- Interface Design: Is the UI modern, attractive, and professional?
- Navigation: Is it easy to find and use features?
- Onboarding: How smooth is the initial setup and learning curve?
- Accessibility: Is the app usable by people with different abilities?
- Consistency: Does the app follow platform design guidelines?
Performance (20% weight)
- Speed: Load times, responsiveness, and general snappiness
- Stability: Absence of crashes, freezes, or major bugs
- Resource Usage: Battery consumption, memory usage, storage requirements
- Optimization: How well the app performs on different devices
Security & Privacy (15% weight)
- Data Protection: How user data is collected, stored, and protected
- Permissions: Whether requested permissions are appropriate and necessary
- Privacy Policy: Clarity and reasonableness of privacy practices
- Security Measures: Encryption, secure authentication, and other safeguards
Value (15% weight)
- Pricing: Whether the price is fair for features offered
- Monetization: How aggressive or reasonable the monetization approach is
- Free vs. Paid: Value proposition of free tier vs. premium features
- Competitive Position: How the app compares to alternatives in terms of value
Scoring Scale
We use a 10-point scale with the following general guidelines:
- 9.0-10.0 – Outstanding: Exceptional apps that set the standard in their category
- 8.0-8.9 – Excellent: High-quality apps with minimal flaws
- 7.0-7.9 – Good: Solid apps that deliver on their promises with some room for improvement
- 6.0-6.9 – Above Average: Decent apps with noticeable issues but still worthwhile
- 5.0-5.9 – Average: Apps that work but have significant flaws or limitations
- 4.0-4.9 – Below Average: Apps with major issues that impact usability
- 3.0-3.9 – Poor: Apps with serious problems that make them hard to recommend
- 0-2.9 – Unacceptable: Apps that are broken, deceptive, or potentially harmful
User Score Calculation
The user score is calculated from verified user ratings using a weighted algorithm that:
- Gives more weight to recent ratings to reflect current app quality
- Factors in rating volume (apps with more ratings have more stable scores)
- Applies statistical techniques to identify and minimize impact of fake or suspicious ratings
- Requires a minimum of 10 ratings before displaying a user score
Score Updates
We maintain the accuracy of our ratings through:
- Major Updates: Apps are re-reviewed when significant updates are released
- Periodic Re-evaluation: Popular apps are re-tested annually
- User Feedback: We investigate when user scores diverge significantly from expert scores
- Issue Reports: Scores may be updated if critical bugs or security issues are discovered
Maintaining Objectivity
To ensure fair and unbiased ratings:
- Reviewers never rate apps they have a personal or financial connection to
- All reviews are subject to editorial oversight and fact-checking
- We maintain complete independence from app developers and advertisers
- Our rating criteria and methodology are publicly documented
- We regularly audit reviews for consistency and accuracy
Transparency
We believe in complete transparency about our rating process. If you have questions about how a specific app was rated, or if you believe a rating is inaccurate, please contact us at [email protected].