Related Products
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About
EternalEngineOS combines five business functions — CRM, invoicing, payments, booking, and email — in one app for solo founders and small service businesses. The one-person business back office: CRM, invoicing, payments, booking and email. Manage clients and contacts, send invoices and estimates, take payments, schedule bookings on your calendar, and send email — all in one place, without juggling five separate subscriptions. EternalEngineOS replaces the patchwork of separate CRM, invoicing, payment, booking and email tools with one simple app designed for one-person businesses. Free tier: $0, no credit card required. Basic: $9.95/mo flat with a 30-day no-card trial. Team $49/mo, Pro $99/mo, Business $199/mo. Built for solo founders and small businesses of every kind. Start free, no card. Basic is $9.95/mo when you're ready. Launched 3 months ago and in beta.
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About
Fronira is a web-based customer payment portal for businesses that manage invoices in QuickBooks Online. It gives customers a branded place to review outstanding invoices and balances, download invoice copies, and submit payments online. The portal connects QuickBooks Online with Stripe for payment processing, and payment activity is synchronized with QuickBooks. Businesses can offer card and ACH payment options, configure a card surcharge or ACH discount, and customize the customer-facing experience. Paid plans can remove Fronira branding and use a custom domain; the Business plan includes API access and custom integrations. The service is aimed at small businesses and service providers seeking a client-facing way to collect invoice payments through their existing QuickBooks workflow. Fronira offers a free plan as well as paid plans; Stripe processing fees apply separately.
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Service businesses and small businesses
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Audience
Small businesses that invoice in QuickBooks Online: trades and service businesses, consultants, and bookkeeping firms.
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Not Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Not Supported
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API
Offers API
Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
$9.95/month
Free $0 (no card, not a trial). Basic $9.95/mo flat, with a 30-day no-card trial. Team $49/mo. Pro $99/mo. Business $199/mo.
Free Version
Supported
Free Trial
Supported
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Pricing
$0/month
Free plan: $0/month with unlimited clients, invoices, and payments. Pro: $125/month; removes Fronira branding and includes a custom domain. Business: custom pricing with API access and custom integrations. Stripe processing fees apply separately.
Free Version
Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Training
Documentation
Not Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Not Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Company InformationEternalEngine
Founded: 2026
United States
eternalengineos.io/basic/
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Company InformationFronira
United States
fronira.com
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Alternatives |
Alternatives |
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Categories |
Categories |
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Business Management Features
Billing & Invoicing
Supported
CRM
Supported
Employee Management
Not Supported
Financial Management
Supported
Inventory Management
Not Supported
Marketing Management
Supported
Order Management
Not Supported
Point of Sale (POS)
Not Supported
Project Management
Not Supported
Purchasing
Not Supported
Scheduling
Supported
Time & Expense Tracking
Not Supported
Training Management
Not Supported
Vendor Management
Not Supported
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Integrations
QuickBooks Online
Not Supported
Stripe
Not Supported
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