| Core Identity |
| Developer | Calculated Industries | Free Style Dev LCC | Impala Studios | Adysseus | 42nd Parallel |
| Category | Utilities | Utilities | Utilities | Productivity | Utilities |
| Platform | iOS, Android | Android, iOS | Android, iOS | iOS, Android | Android, iOS |
| Store Metrics |
| Rating | 4.9 / 5 | 4.2 / 5 | 4.7 / 5 | 4.8 / 5 | 4.7 / 5 |
| Ratings Count | 4,036 | 3,883 | 1,715,926 | 1,215 | 68 |
| Price | Free | Free | Free | Free | $24.99 |
| Release Date | Sep 8, 2010 | Jul 24, 2019 | Oct 22, 2010 | Jul 4, 2016 | Oct 14, 2009 |
| Last Updated | Jan 31, 2026 | Mar 26, 2026 | Apr 23, 2026 | Aug 2, 2024 | Mar 29, 2026 |
| Sentiment & Reviews |
| Sentiment | positive | - | mixed | positive | excellent |
| Score | 75/100 | - | 45/100 | 82/100 | 85/100 |
| Praises | - High precision and reliability in construction calculations keep professionals engaged across multiple project types
| - | - All-in-one utility including scientific functions and unit converters provides significant daily value
| - Minimalist interface design provides a fast and distraction-free experience for daily unit conversions
| - Advanced stair and baluster layout functions save significant time for professional carpenters on job sites
- Responsive customer support provides rapid solutions to technical issues for long-term professional users
|
| Complaints | - Transition from lifetime purchase model to recurring subscription creates significant friction for long-term users
| - | - Removal of the running total feature post-update disrupts established user calculation habits
| - Inability to manually reorder unit categories prevents users from prioritizing their most frequent conversions
| - Input field logic automatically erases user values when calculating irregular hip roof dimensions
- Lack of a dedicated refresh button forces manual workarounds to clear calculation fields
|
| Requests | - Reintroduction of specific shortcut buttons to improve speed during repetitive construction measurement tasks
| - | - Integration of currency converter and memory functions into the core stock calculator experience
| - Manual reordering of unit categories would allow users to prioritize their most frequently used measurements
| - Haptic feedback integration for button presses to improve tactile confirmation in field environments
|
| Strategic Intel |
| Strengths | - Specialized construction-math logic replaces physical hardware [Professional Segment]
- High-precision conversion engine sustains daily utility [Professional Segment]
| - | - 200 million download footprint provides massive top-of-funnel acquisition
- All-in-one utility design creates high daily session utility
- VoiceOver and high-contrast accessibility features expand addressable market
| - Minimalist interface design reduces cognitive load for daily tasks
- High-precision rounding logic supports professional-grade utility
- iPad multitasking integration drives power-user retention
| - Specialized stair-layout engine functions as a B2B distribution moat for professional documentation
- High-touch developer support drives retention among long-term professional tradespeople
- Interactive calculation logic reduces field errors compared to legacy hardware calculators
|
| Weaknesses | - Subscription-only model triggers legacy user churn [Monetization]
- 0.38★ Android-iOS rating gap indicates platform-specific regression [Platform Quality]
| - | - Removal of running total feature disrupts power-user calculation habits
- Aggressive subscription prompts drive high churn in the free tier
- UI scaling issues on non-full-screen devices hinder input visibility
| - Fixed category order creates navigation friction
- Lack of quick-switch menu between categories
- 0.02 rating gap between iOS and Android platforms
| - Manual field-clearing workflow creates UI friction for high-frequency users
- Input logic overwriting custom values during roof calculations disrupts professional workflows
- Android version lacks feature parity with the iOS build
|
| Pricing | subscription | subscription | freemium | free | paid |
| Momentum | Active | Intense | Active | Zombie | Intense |
| Update Cadence | 5 versions | 5 versions | 5 versions, 3 majors/6mo, ~14d avg | 2 versions, ~352d avg | 5 versions |
