No. 21of 26 ·Gym Membership Billing Software

Flux Payments

Web · iPhone · API

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Freedom report

One barScore 5.0

Runs widely2 of 6 device platforms
DocumentedPlans, terms and facts published

Flux Payments is ranked #21 of 26 in gym membership billing software on Freedom251. It runs on API, iOS, Web.

Flux Payments plans and pricing

All plans

Flat Rate 2.9% + 30¢ per transaction Cards, ACH, and stablecoins · full platform access · may have a $20 monthly account fee below $100,000 annual card volume · volume discounts available fluxpayments.com · 2 Oct 2026

Consumer Pass-Through Processing fee added to customer checkout where local rules allow · cards, ACH, and stablecoins · full platform access · may have a $20 monthly account fee below $100,000 annual card volume fluxpayments.com · 2 Oct 2026

Compared on gym membership billing software

Free plan: No
Failed-payment recovery: Yes
Refunds: Yes
Payment reporting: Yes
Accounting integrations: Yes

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The record

Payment platform: Flux combines card, ACH, and stablecoin payment processing in one platform.
Card payments: Flux accepts Visa, Mastercard, American Express, and Discover through one integration.
ACH fee: The pricing page lists ACH bank transfers at $5.00 flat.
Stablecoin fee: The pricing page lists stablecoin payments as Free (0%).
Billing: Recurring billing includes automatic retries and dunning emails for failed payments.
Integrations: Flux lists QuickBooks Sync, a free WooCommerce plugin, Set Forth, and a GoHighLevel integration marked as in the works.
QuickBooks: Flux syncs transactions, invoices, fees, and refunds into QuickBooks automatically and categorizes them.
Security: Flux says it is SAQ-D, PCI DSS Level 2 certified and captures card data in origin-isolated iframes so it does not touch the merchant's servers or domain.
Fraud detection: The pricing page describes real-time transaction screening using machine-learning models trained on payment data.
Settlement: The pricing page says card payments typically settle in 1–2 business days, ACH in 1–3 business days, and stablecoins instantly to a wallet.
Developer tools: Flux lists Node.js, Browser, React Native, iOS, and Python SDKs, plus a REST API with interactive docs.
Support: Flux says its support team handles technical and account questions by email, while sales replies within one business day.
Notable limit: Accounts processing under $100,000 a year in card volume may be subject to a $20 monthly account fee.
Intended customers: Flux describes its platform as payment infrastructure for modern businesses and lists industries including e-commerce, healthcare, SaaS, agencies, contractors, and nonprofits.

Where it ranks on Freedom251

Best Gym Membership Billing Software in 2026#21 of 26

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Sources

fluxpayments.com· checked 2 Oct 2026
fluxpayments.com/products/card-processing/· checked 2 Oct 2026
fluxpayments.com/pricing.html· checked 2 Oct 2026
fluxpayments.com/products/· checked 2 Oct 2026
fluxpayments.com/products/quickbooks-sync/· checked 2 Oct 2026
fluxpayments.com/products/pci-compliance/· checked 2 Oct 2026
fluxpayments.com/contact.html· checked 2 Oct 2026