Report updated May 19, 2026
Cuspart: Kâr/Zarar
For e-commerce sellers on platforms like Trendyol, Hepsiburada, Amazon, and Etsy.
Cuspart: Kâr/Zarar is a well-regarded business app that is completely free. With a 4.8/5 rating from 820.5K reviews, it maintains solid user satisfaction. Users particularly appreciate simplicity of profit-tracking interface, though manual data entry friction remains a common concern.
What is Cuspart: Kâr/Zarar?
Cuspart is a profit and loss calculation tool for e-commerce sellers, available as a free utility on Android.
Users hire Cuspart to replace manual Excel accounting with an automated, privacy-focused margin calculator that accounts for marketplace-specific commissions and shipping costs.
Current Momentum
v1.33 · 4d ago
Maintenance- Maintains 4.81 rating on Android.
- Ships regular stability updates.
Active Nemesis
Splid – Split group bills
By Nicolas Jersch
Other Rivals
7-Day Rank Pulse 🇺🇸
BusinessNo ranking data
Rating Pulse 🇺🇸
Recent User Mood
What makes this app unique?
What Does It Look Like?
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What Are The Key Features?
Financial data is stored exclusively on the device.
Automated calculation of profit after commissions and costs.
Export reports in PDF or CSV format.
How much does it cost?
- Free access to all features
The app operates as a free tool with no visible subscription gates, focusing on user acquisition.
Who Built It?
Mustafa Tolga DALBUDAK
Providing specialized utility and productivity tools for professionals and students. Focused on offline-first functionality for everyday tasks.
Portfolio
13
Apps
What other apps does Mustafa Tolga DALBUDAK make?
Explore the full Mustafa Tolga DALBUDAK report
Portfolio breakdown, audience, momentum, and every app published by Mustafa Tolga DALBUDAK.
What do users think recently?
High confidence · Latest 100 of 820.5K total reviews analyzed
What is the recent mood?
Recent user voice shows a excited sentiment. Users appreciate simplicity of profit-tracking interface, but report manual data entry friction.
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 Cuspart: Kâr/Zarar?
Where is it available?
Localized markets (1)
How's The Business Market?
**Pricing Strategy**: Free access to all features, prioritizing user acquisition and market penetration over immediate monetization. **Target Audience**: Small-to-medium e-commerce sellers operating on platforms like Trendyol, Hepsiburada, and Etsy.
How does it evolve in the Business market?
Cuspart maintains a high 4.81 rating on Android with over 820,000 reviews, signaling strong product-market fit for individual sellers despite the lack of iOS presence.
Rank progression
114 active rankings tracked — 30-day window
Which niche is Cuspart: Kâr/Zarar in?
to calculate net profit for e-commerce products
Explore the full Budgeting Calculators niche
Every app in this space — 63 tracked, the niche's live rankings, and Marlvel's editorial take on the job-to-be-done.
The rivals identified
Nemeses(1)
Both apps function as specialized financial calculators that strip away complexity for niche user groups—e-commerce sellers for Cuspart and military personnel for this rival.
Contenders(4)
It acts as a regional competitor for users needing tax and investment planning tools within the European market.
Differentiators
- Offers localized tax planning tools specifically designed for European financial regulations, creating a strong regional competitive advantage.
- Features detailed amortization schedules that provide users with long-term visibility into their loan and debt obligations.
This app competes for the same 'financial utility' screen real estate by offering loan and investment planning tools.
Differentiators
- Provides dedicated mortgage and loan amortization calculators that offer deeper debt-management insights than Cuspart's current toolset.
- Includes comprehensive investment planning modules that cater to long-term wealth management rather than short-term e-commerce profit.
It serves as a direct alternative for users seeking basic financial tallying tools without the overhead of e-commerce tax and shipping integrations.
This app competes by providing a simplified, manual calculation interface that serves as a low-friction alternative to Cuspart’s e-commerce-specific logic.
Same space(3)
Targets the same audience of financially-conscious users by offering cash advances and budgeting tools.
Competes for the user's financial management workflow by providing digital wallet and expense tracking capabilities.
Provides banking and financial management services that compete for the attention of the same professional user base.
Compare Cuspart: Kâr/Zarar 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 Cuspart: Kâr/Zarar
Strengths to defend, gaps to attack
Core Strengths
- Local-only storage ensures data sovereignty for privacy-conscious business owners.
- Specialized e-commerce cost-variable inputs outperform generic financial calculators.
Critical Frictions
- Manual data entry creates friction for high-volume sellers.
- Lack of cloud-sync prevents multi-device management.
Growth Levers
- API integrations with marketplaces could automate cost-tracking.
- Tablet-specific UI could capture on-the-go inventory management.
Market Threats
- Established financial suites adding e-commerce modules threaten standalone calculators.
- Manual entry fatigue drives users toward automated accounting platforms.
What are the next best moves?
Pivot manual entry to automated platform API imports because users report high friction in manual data entry → increase retention of high-volume sellers.
Top user request is for automated cost-tracking to replace manual inputs.
Trade-off: Pause the UI redesign sprint — API automation has higher retention impact than visual polish.
Invest in cloud-sync optionality because multi-device access is the top request for scaling businesses → unlock professional user segment.
Lack of cloud-sync prevents multi-device management for scaling sellers.
Trade-off: Deprioritize the PDF export formatting update — cloud-sync is a higher-value utility for professional users.
A counter-intuitive read
The privacy-first local storage model is a liability for scaling, as professional sellers prioritize cross-device inventory management over the theoretical security of offline-only data.
Feature Gaps vs Competitors
- Real-time group synchronization (available in Splid but absent here)
- Multi-currency conversion tools (available in Splid but absent here)
Key Takeaways
Cuspart wins on privacy and specialized e-commerce math, but the manual entry requirement limits its scalability for professional sellers, so the PM should prioritize marketplace API integrations to reduce user friction.
Where Is It Heading?
Stable
The e-commerce utility market is shifting toward automated, platform-integrated accounting, leaving standalone calculators exposed. Cuspart must transition from a manual tool to an integrated service to maintain its lead against automated competitors.
High rating consistency on Android indicates the core profit-calculation utility remains highly valued by the target user base.
Manual entry friction in the latest version creates a churn risk as sellers scale their operations beyond simple manual tracking.