Overview
Rubber Duck is a specialized iOS app testing service designed to catch issues that could lead to App Store rejection. It combines automated checks with human testers on real devices, providing detailed reports with video replays and actionable steps. Pricing starts at $19 per scan and goes up to $99/month for daily scans.
Percentage Increase Calculator is a free online tool that instantly computes percentage changes between two values. It supports both increases and decreases, displays negative results in red, and allows users to solve for any missing value. It is ideal for salary raises, price increases, stock growth, and property value changes.
Feature Comparison
| Feature | Rubber Duck | Percentage Increase Calculator |
|---|---|---|
| Primary Function | Pre-submission iOS app testing | Percentage change calculation |
| Target Audience | iOS developers, startups, enterprises | General public, professionals |
| Testing Method | Automated + human testers on real devices | N/A |
| Input Method | Upload IPA or App Store link | Enter any two of three fields |
| Result Type | Detailed report with video replays | Instant percentage with formula |
| Decrease Support | N/A | Yes, negative results in red |
| Auto-calculation | No | Yes, updates as you type |
| Pricing | Subscription-based | Free |
| Platform | Web-based service | Web-based calculator |
| Support | Priority queue, Slack on higher plans | None |
Pricing
Rubber Duck offers a single-use Pre-Flight Scan at $19/scan. Monthly subscriptions include Basic ($29/mo for 3 scans), Pro ($49/mo for 10 scans with priority queue), and Daily ($99/mo for daily scans with nightly regression and Slack support).
Percentage Increase Calculator is completely free to use with no subscription or hidden fees.
Pros and Cons
Rubber Duck
Pros:
- Comprehensive testing combining automated checks and human testers on real devices
- Fast turnaround (~4 hours for most scans)
- Detailed reports with video replays and actionable steps
- Flexible pricing tiers for different needs
- Free re-scan if rejection occurs despite following report
Cons:
- Only supports iOS apps
- Requires subscription for regular use
- Not suitable for non-iOS or non-app testing scenarios
Percentage Increase Calculator
Pros:
- Completely free and easy to use
- Instant auto-calculation with step-by-step formula display
- Supports both increases and decreases with visual indicators
- Versatile for various use cases (salary, prices, investments)
- No sign-up or installation required
Cons:
- Limited to percentage calculations only
- No advanced features or integrations
- No customer support or troubleshooting
Verdict
Rubber Duck is the clear choice for iOS developers needing pre-submission testing to avoid App Store rejections, offering thorough automated and human testing on real devices. Percentage Increase Calculator is a simple, free tool ideal for quick percentage change calculations in everyday scenarios like salary raises or price changes. Choose Rubber Duck for app quality assurance, and the calculator for instant math.
Percentage Increase Calculator
Rubber Duck