
Margn.shop
Free fee and profit calculators for TikTok Shop, Stripe, PayPal, and Shopify

Create iOS and Android apps with React and Ionic

Website, pricing, platforms and company facts side by side.
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| Website | carinextech.eu | reactionic.github.io |
| Pricing | — | |
| Company | 2026 | — |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Carinextech.eu and React-Ionic.
Carinextech.eu's answer
E-commerce merchants, Shopify store owners, TikTok Shop sellers, dropshippers, digital agencies, and independent creators who need to protect their net profit margins.
Carinextech.eu's answer
Carinex Tech Tools provides real-time financial math specifically built for modern multi-channel sellers, accounting for exact 2026 platform referral fees, affiliate creator commissions, VAT, and international payment processing spreads with zero signup required.
Carinextech.eu's answer
Unlike generic fee calculators with outdated rates, Carinex Tech provides up-to-date 2026 fee tiers for TikTok Shop (US, UK, EU), Stripe, PayPal, and Shopify, including reverse invoice calculations and smart upgrade recommendations.
Carinextech.eu's answer
We noticed many e-commerce sellers were losing 15% to 30% of their revenue to hidden platform commissions and payment spreads without realizing it. We built these free calculators to give merchants 100% transparency into their real unit economics.
Carinextech.eu's answer
JavaScript, HTML5, CSS3, WordPress, and LiteSpeed High-Performance Server.
Carinextech.eu's answer
TikTok Shop Sellers
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Free TikTok Shop profit calculator — see your real margins after fees, COGS, ad spend & commissions.
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