| Core Identity |
| Developer | Cider Software LLC | 7th Gear | Gilbert Montane Pinto | smalltech sarl | smalltech sarl | MobArts | Oyku Gul Imran | Webtoweb | Adysseus | Rome Rock LLC |
| Category | Utilities | Utilities | Utilities | Utilities | Utilities | Utilities | Productivity | Tools | Productivity | Utilities |
| Platform | iOS | iOS | iOS | iOS | iOS | iOS | iOS, Android | Android | iOS, Android | Android, iOS |
| Store Metrics |
| Rating | 4.8 / 5 | 4.7 / 5 | 4.6 / 5 | 4.4 / 5 | 4.8 / 5 | 4.8 / 5 | 0.0 / 5 | 4.5 / 5 | 4.8 / 5 | 4.7 / 5 |
| Ratings Count | 2,033 | 60,844 | 12 | 275 | 99 | 3,095 | 0 | 2,687 | 1,215 | 967 |
| Price | USD9.99 | Free | Free | Free | $3.99 | Free | Free | Free | Free | Free |
| Release Date | Dec 26, 2013 | Jul 30, 2011 | Nov 15, 2016 | Sep 30, 2011 | Sep 30, 2011 | Apr 13, 2011 | Jul 12, 2024 | Dec 6, 2018 | Jul 4, 2016 | Mar 6, 2018 |
| Last Updated | Mar 22, 2026 | Dec 9, 2020 | Jan 14, 2024 | Apr 13, 2020 | Apr 13, 2020 | Feb 28, 2026 | Jul 12, 2024 | Jan 7, 2026 | Aug 2, 2024 | Oct 31, 2023 |
| Sentiment & Reviews |
| Sentiment | positive | - | - | - | - | - | excellent | positive | positive | positive |
| Score | 85/100 | - | - | - | - | - | 92/100 | 85/100 | 82/100 | 75/100 |
| Praises | - Calculation history tape provides reliable verification for long strings of business numbers
| - | - | - | - | - | - Extensive unit library and customization options provide utility for professional engineering and academic tasks
- Clean interface design avoids intrusive advertisements and unnecessary bloatware found in competing conversion tools
| - Simplicity and speed of conversion
| - Minimalist interface design provides a fast and distraction-free experience for daily unit conversions
| - High accuracy and simple interface design make daily unit conversions fast and reliable for users
|
| Complaints | - Widget functionality fails to trigger correctly on iPadOS and iOS devices
| - | - | - | - | - | - Inconsistent currency conversion availability creates confusion regarding the removal of specific national currencies
| - Lack of offline functionality
| - Inability to manually reorder unit categories prevents users from prioritizing their most frequent conversions
| - Complex navigation through long lists makes finding specific conversion categories difficult for casual users
|
| Requests | - Apple Watch integration requested to enable quick calculations from the wrist
| - | - | - | - | - | - Customizable result separators and saved conversion lists would improve workflow efficiency for frequent users
| - Advanced mathematical features
| - Manual reordering of unit categories would allow users to prioritize their most frequently used measurements
| - Favorite conversions and reverse toggle buttons would reduce repetitive navigation for frequent users
|
| Strategic Intel |
| Strengths | - Ad-free business model increases long-term user trust
- History tape functionality creates high switching costs for professionals
| - 75-significant-digit math engine supports professional-grade accuracy requirements
- Tactile leather-texture UI provides a distinct visual identity on iPad
- Integrated drawing and notes tab enables hybrid math-and-scratchpad workflows
| - | - | - | - | - Clean interface design reduces churn by avoiding intrusive ad-bloat
- Offline-first architecture ensures utility in field environments
- Custom unit-saving mechanism embeds the app into specialized professional workflows
| - French-specific linguistic library creates a niche barrier against English-centric conversion suites
- High-visibility interface reduces friction for administrative check-filling tasks
| - Minimalist interface design reduces cognitive load for daily tasks
- High-precision rounding logic supports professional-grade utility
- iPad multitasking integration drives power-user retention
| - Multi-language unit library functions as a B2B distribution barrier into international markets
- Offline-first architecture ensures utility in travel environments
- Scientific prefix support targets high-value technical users
|
| Weaknesses | - Widget functionality failures erode premium user utility
- Intrusive rating prompts drive negative sentiment
| - Aggressive subscription prompts for basic features drive negative sentiment
- Lack of graphing or equation-solving modules limits appeal to STEM students
- Ad-supported model creates friction compared to ad-free engineering alternatives
| - | - | - | - | - Premium tier lacks clear value-add differentiation
- 0.7★ rating gap between platforms suggests inconsistent feature parity
- No cloud-save functionality despite user requests
| - Ad-supported model creates session churn
- No offline-save capability despite student-demographic reliance on low-connectivity environments
| - Fixed category order creates navigation friction
- Lack of quick-switch menu between categories
- 0.02 rating gap between iOS and Android platforms
| - Navigation friction caused by long lists
- Lack of fractional imperial units
- Missing pressure measurement types
|
| Pricing | paid | freemium | freemium | free | paid | free | freemium | freemium | free | free |
| Momentum | - | Zombie | - | - | - | - | Zombie | Maintenance | Zombie | Maintenance |
| Update Cadence | - | 1 versions | - | - | - | - | 2 versions, ~631d avg | 1 versions, 1 majors/6mo | 2 versions, ~352d avg | 2 versions, ~857d avg |
