Simple - Unit Converter is a utility app for Android that provides conversion tools for 87 categories, including specialized engineering and math calculators.
The App DNA
What makes this app unique?
It serves users who need reliable, offline-first conversion tools for daily academic or professional tasks without requiring an active data connection.
For Students and professionals requiring a broad range of unit, currency, and engineering calculations for daily tasks.
What does it look like?
Key features
Converts world currencies without internet connectivity by storing exchange rates locally.
Enables unit conversion directly from the device home screen.
Specialized tools for radiation, electric resistance, and equation solving.
How much does it cost?
Monetization relies on a one-time purchase model to remove ads and gate professional-grade engineering tools.
Velocity
Maintenance developmentnew contentUX improvementsShow more...
The app exhibits a maintenance-level cadence, with the most recent release occurring over 15 months ago relative to the current date of May 2026. There is no evidence of a consistent release schedule or recent feature development. The latest release focused on a broad expansion of utility tools and calculators, but the lack of subsequent updates indicates a cessation of active development. The app is currently in a state of long-term inactivity.
Who built it?
KENTA OKAMURA
3 apps tracked · Lifestyle
Simple-SpiderSolitaire
旅行用-通貨両替電卓User Sentiment
What do users think recently?
Review voice lately leans mixed. Users appreciate extensive unit category library provides high utility for professional and academic users, but report intrusive full-screen advertisements disrupt the user experience and hinder navigation between tools.
How are ratings & reviews evolving?
What users say, by theme
- Extensive unit category library provides high utility for professional and academic users
- Intrusive full-screen advertisements disrupt the user experience and hinder navigation between tools
50 of 50 recent reviews analyzed · high confidence · Mixed overall
Read the full review analysisUnlock 1 user request, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Simple - Unit Converter
How's the Lifestyle market?
Simple - Unit Converter holds a 4.5-star rating across 186,058 reviews on Android, maintaining a stable position despite a 15-month update gap prior to the latest release. The lack of a home screen widget compared to rivals like Easy Unit limits its utility for high-frequency users.
Read the market outlookThe rivals identified
By APPS BAY LIMITED
This app directly competes for the same utility-focused user base by offering a comprehensive conversion engine that mirrors this app's core functionality.
- Offers specialized calculators beyond basic unit conversion, capturing users needing more than simple arithmetic.
- Includes home screen widgets that provide faster, one-tap access to conversions compared to this app.
- Maintains a higher review count and rating, signaling stronger user trust and established market presence.
Unlock the head-to-head verdict: where this rival wins, and where it loses.
Access the full report for freeThe Analyst's Read
Key takeaways for Simple - Unit Converter
Where is it heading?
The utility-tool market is consolidating around convenience-first features like home screen widgets and integrated calculators. Simple - Unit Converter remains exposed to rivals that offer faster access, and the current ad-heavy monetization will continue to compress user retention unless the UX friction is addressed.
- The latest release expanded the category library to 87 items, signaling active feature investment rather than maintenance mode.
- Intrusive full-screen ads in the latest version erode the daily active habit, which compounds the churn pressure already visible in reviews.
The SWOT
- Offline-first conversion engine removes connectivity dependency rivals require
- Integration of a basic arithmetic calculator would consolidate daily math and conversion workflow
Next best moves
Ship home screen widget because it is the primary differentiator for the nemesis → reduce user friction
+ 1 more prioritized moveThe counter-intuitive read
The lack of real-time currency updates is a feature, not a bug…
Read the full takeFeature gaps
Home screen widget (available in Easy Unit but absent here) +1
Since the last report: The product roadmap has pivoted from UI modernization to high-impact feature development, specifically prioritizing a home screen widget and arithmetic calculator to address user churn and competitive pressure from Easy Unit.
Bottom line
Simple - Unit Converter's offline-first engine retains core professional users, but the lack of a home screen widget and intrusive ads creates a churn funnel. Prioritizing widget accessibility would address the primary competitive disadvantage against Easy Unit.
Unlock 1 critical friction, 1 market threat, 1 more prioritized move and the analyst’s take.
Access the full report for freeFAQ
Is Simple - Unit Converter good for professional engineering work?
How does Simple - Unit Converter compare to Easy Unit?
Does Simple - Unit Converter have intrusive advertisements?
What is a free alternative for unit conversion?
Sources
- [1] Play Store listing, source
Report last updated