Report updated May 6, 2026
GTP API Gravity Calculator2
For aviation and industrial fuel professionals requiring precise fuel density and weight calculations.
GTP API Gravity Calculator2 is an established utilities app that is a paid app. With a 4.4/5 rating from 764.8K reviews, it shows polarized user reception. Users particularly appreciate simple and accurate calculation logic provides reliable utility for everyday math tasks, though recent design changes removed essential quick-answer displays and altered the decimal placement remains a common concern.
What is GTP API Gravity Calculator2?
GTP API Gravity Calculator is a specialized fuel density and weight utility for aviation and industrial professionals on iOS and Android.
Users hire this tool to perform precise, industry-standard fuel gravity corrections that general-purpose calculators cannot reliably execute.
Current Momentum
v9.1 (886477075) · 1mo ago
Maintenance- Implemented Material 3 Expressive design.
- Added Dark Mode compatibility.
What makes this app unique?
What Does It Look Like?
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What Are The Key Features?
Calculates corrected API gravity at 60 degrees Fahrenheit for jet, gasoline, and diesel fuels.
Determines total fuel weight based on API gravity inputs.
How much does it cost?
- iOS: $9.99
- Android: Free
Monetization is platform-specific, utilizing a $9.99 upfront purchase on iOS while maintaining the Android version as a free utility.
Who Built It?
Gammon Technical Products
Digitizing specialized fuel management hardware for technicians and industry professionals.
Portfolio
2
Apps
What other apps does Gammon Technical Products make?
Explore the full Gammon Technical Products report
Portfolio breakdown, audience, momentum, and every app published by Gammon Technical Products.
What do users think recently?
High confidence · 50 reviews analyzed · Based on 50 reviews. Signal may be noisy.
What is the recent mood?
Recent user voice shows a mixed sentiment. Users appreciate simple and accurate calculation logic provides reliable utility for everyday math tasks, but report recent design changes removed essential quick-answer displays and altered the decimal placement.
What Users Love
What Frustrates Users
What Users Want
View the full user-sentiment analysis
Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.
What is the competitive landscape for GTP API Gravity Calculator2?
How's The Utilities Market?
Market outlook for this category
Available very soon
The rivals identified
Same space(3)
Demonstrates how a single-purpose utility can achieve massive scale through high-frequency performance optimization.
Differentiators
- Delivers real-time, data-heavy diagnostic feedback that creates a high-frequency usage loop for the user.
- Maintains a global server infrastructure that provides tangible value beyond simple local arithmetic calculations.
Represents the gold standard for utility-based trust and security, setting a high bar for UI reliability.
Differentiators
- Leverages massive brand trust and ecosystem integration that specialized utility apps struggle to replicate.
- Provides a streamlined, minimalist interface that prioritizes user security workflows over complex calculation features.
High-velocity utility suite that dominates the general calculator category through consistent feature updates.
Differentiators
- Maintains a high-frequency release cadence of nine updates in six months to ensure OS compatibility.
- Offers a broad, multi-functional utility suite that captures general users beyond specialized fuel calculations.
New entrants(1)
Aggressive release velocity indicates a rapid iteration strategy to capture market share in the utility space.
Differentiators
- Integrates AI-driven automation to solve storage management pain points, moving beyond manual user input.
- Ships frequent feature updates to rapidly adapt to new OS storage management APIs and constraints.
Compare GTP API Gravity Calculator2 against every rival
All rivals in one side-by-side table — identity, store metrics, ratings & sentiment, and strategic intel — plus a head-to-head page for each.
The outtake for GTP API Gravity Calculator2
Strengths to defend, gaps to attack
Core Strengths
- Specialized fuel-density algorithms function as a B2B distribution barrier into aviation logistics partnerships.
Critical Frictions
- $9.99 iOS price point sits above the $0-4.99 utility median, creating conversion friction.
Growth Levers
- Integration of unit conversion tools would capture the broader industrial logistics market.
Market Threats
- Technical instability post-update causes force-closures, driving users toward more stable, high-velocity competitors.
What are the next best moves?
Restore quick-answer display because users flag its removal as a top usability regression → reduce churn.
Sentiment data identifies the removal of real-time sum displays as the #1 complaint theme.
Trade-off: Pause the ongoing Material 3 UI polish — quick-answer restoration is a functional necessity.
Audit trigonometric calculation logic because users report inaccuracies post-update → restore professional trust.
Reports of mathematical inaccuracies directly threaten the app's core value proposition for industrial users.
Trade-off: Delay the unit converter feature request — core accuracy is the primary retention lever.
A counter-intuitive read
The $9.99 iOS price point is not a weakness but a signal of professional-grade utility that differentiates the app from the free, ad-supported general calculator market.
Feature Gaps vs Competitors
- Real-time currency conversion (available in general utility suites but absent here)
- Memory recall functions (available in legacy versions but missing here)
Key Takeaways
The app provides essential industrial utility, but recent UI regressions and calculation errors threaten its professional reputation, so the PM must prioritize stability and accuracy to prevent user migration to more reliable competitors.
Where Is It Heading?
Declining
The utility market is consolidating around high-velocity, stable apps that prioritize OS compatibility and UI reliability. The subject app is currently exposed due to technical regressions, so the PM must stabilize the core calculation engine to prevent further loss of the professional user base.
Technical instability and UI regressions in the latest update drive negative sentiment, which compounds the risk of professional user churn.
The removal of legacy memory functions reduces efficiency for power users, leading to requests for parity features that remain unaddressed.