Simple Unit Converter is a technical measurement utility for engineers and students on iOS, providing conversions across 15 categories.
The App DNA
What makes this app unique?
The app serves users who require specialized technical units like dynamic viscosity and volumetric gas flow, which are often absent in mainstream, simplified conversion tools.
For Students, engineers, and professionals requiring quick unit conversions across basic and technical measurement systems.
What does it look like?
Key features
Calculates values across 15 categories including length, area, mass, temperature, and fluid dynamics.
Includes specialized units like dynamic viscosity, kinematic viscosity, and volumetric gas flow.
How much does it cost?
The app is distributed as a free utility with no visible subscription or in-app purchase gates.
Velocity
Dormant developmentopaqueShow more...
Simple Unit Converter has seen no development activity for 3,871 days. The app remains in a state of total stagnation with no feature updates or maintenance patches provided in over a decade. Given the lack of updates since its initial release, the app is classified as a zombie project.
Who built it?
Jian Yih Lee
13+ apps tracked · Productivity
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What do users think recently?
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for Simple Unit Converter - Pro Measurement and Conversion Calculator for Multi Units
How's the Productivity market?
Simple Unit Converter maintains a 4.3-star rating across 219 total ratings, reflecting a stable but aging user base. The lack of updates for over 3,800 days signals a complete absence of competitive pressure from the developer side.
Read the market outlookThe rivals identified
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for Simple Unit Converter - Pro Measurement and Conversion Calculator for Multi Units
Where is it heading?
The market for conversion utilities is consolidating around apps that offer frequent updates and modern design. Simple Unit Converter remains exposed due to its static state, which will likely lead to a gradual decline in relevance as technical users migrate to tools with better support.
- The 10-year development freeze prevents the integration of modern UI standards, which accelerates user churn toward active, updated conversion tools.
The SWOT
- Specialized technical units like dynamic viscosity differentiate the tool for professional use.
- Free-to-use model lowers the barrier for student adoption.
- Technical unit library provides a foundation for a modern, responsive conversion tool.
Next best moves
Sunset the current build because the 10-year maintenance gap prevents competitive feature parity → reallocate resources
The counter-intuitive read
The lack of updates is a feature for users who prioritize a static…
Read the full takeSince the last report: The app's development status remains frozen, with no updates since 2015. The primary change is a strategic shift in the internal assessment, which now classifies the tool as a legacy asset to be sunset rather than maintained.
Bottom line
Simple Unit Converter relies on its niche technical unit library to maintain relevance, but the decade-long development freeze makes it highly vulnerable to any modern rival that adds similar specialized measurement support.
Unlock 2 critical frictions, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Is Simple Unit Converter still updated in 2026?
Does Simple Unit Converter include specialized engineering units?
Are there free alternatives to Simple Unit Converter?
Sources
- [1] App Store, source
Report last updated