Gross Margin Calc is a financial utility for calculating mark-up, margin, and platform-specific selling prices on iOS and Android.
The App DNA
What makes this app unique?
Users hire this app to eliminate manual math errors when calculating net profit across marketplaces with complex fee structures.
For E-commerce merchants on platforms like eBay, Amazon, and Shopify, and sales professionals requiring quick financial margin calculations.
What does it look like?
Key features
Configurable fee structures for eBay, Amazon, and Shopify to calculate required selling prices based on cost and margin
Calculates mark-up, margin, selling price, or cost price from any two input variables
Supports GST/VAT calculations on cost or sell price, plus inclusion of delivery charges
Zero advertisements or in-app purchases in the iOS version
How much does it cost?
Monetization is bifurcated by platform, using a $3.99 upfront purchase on iOS to capture value from professional users while utilizing ad-inventory on the Android version.
Velocity
Active developmentShow more...
5 versions in history. Development pace: active.
Who built it?
Ed Stivala
7 apps tracked · Business
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Critical Swim Speed
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Run Times & Paces
Inventory Management Pro
Profit Price CalculatorUser Sentiment
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 Gross Margin Calc
How's the Business market?
The app holds the #92 Paid position in the US Business category on iOS. The divergence between the $3.99 iOS price and the ad-supported Android model signals a strategy to capture professional value on Apple hardware while monetizing casual traffic via ads on Android.
Read the market outlookThe rivals identified
By Bookipi Pty Ltd
Directly targets the same SMB/freelancer audience with a focus on financial documentation and margin-adjacent workflows.
- Integrates full invoicing and estimate creation workflows directly into the core financial calculation experience.
- Maintains a high release cadence of 9 updates in six months, indicating rapid feature iteration.
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for Gross Margin Calc
Where is it heading?
The market for standalone margin calculators is consolidating as marketplaces integrate their own financial tools. Gross Margin Calc remains stable but exposed, so long-term viability hinges on moving beyond simple math into workflow integration.
- Recent updates focused on stability and bug fixes, indicating a maintenance-mode posture rather than aggressive feature expansion.
- Platform-native tools like Amazon Seller are increasing their feature depth, which directly drains the utility value of standalone calculators.
The SWOT
- Platform-specific fee modeling establishes category authority for e-commerce sellers
- Ad-free iOS experience creates a distraction-free environment for professional users
- Multi-variable calculation logic provides a core utility loop for daily financial tasks
- Develop B2B partnerships with e-commerce coaching platforms for distribution
- Add cloud-save functionality to improve retention for multi-device power users
Next best moves
Ship cloud-sync functionality because multi-device usage is a standard expectation for professional financial tools → increase retention
+ 1 more prioritized moveThe counter-intuitive read
The app's biggest threat is not a rival calculator…
Read the full takeFeature gaps
Integrated invoicing and estimate creation (available in Invoice Maker & Estimate App) +1
Since the last report: The app adopted a freemium monetization strategy and refined its market positioning to focus on e-commerce fee modeling as a primary differentiator.
Bottom line
Gross Margin Calc provides essential utility for e-commerce sellers, but its fragmented monetization and lack of cloud-sync limit its professional appeal, so the PM should prioritize cross-platform data parity to defend against platform-native tools.
Unlock 3 critical frictions, 2 market threats, 1 more prioritized move and the analyst’s take.
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