TheBookOfBizCrewlabs.io
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Related Products
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EternalEngine:
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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TheBookOfBiz:
About
TheBookOfBiz is a micro-CRM for independent tutors and coaches running a one-person practice. It keeps students, parents, sessions, and billing records in one place, without the multi-location features aimed at larger tutoring businesses.
Bookings: each tutor gets a professional booking page. Students and parents pick a time, automated 24-hour reminders go out, and new students receive a welcome package with the tutor's contract. Sessions can be added to the tutor's Google Calendar (one-way sync: TheBookOfBiz creates and deletes its own events and does not read the calendar).
Prepaid session tracking: tutors record session blocks a student has prepaid, and a per-student wallet deducts one session from the tracked balance each time a lesson is completed. Tutors collect payment however they already do; TheBookOfBiz never processes or holds client payments. PDF invoices can be generated in a few clicks.
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EternalEngine:
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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TheBookOfBiz:
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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EternalEngine:
Audience
Service businesses and small businesses
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TheBookOfBiz:
Audience
Private tutors in any subject (academics, music, test prep, languages) who currently rely on spreadsheets or manual notes.
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EternalEngine:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Not Supported
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TheBookOfBiz:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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EternalEngine:
API
Offers API
Not Supported
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TheBookOfBiz:
API
Offers API
Not Supported
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EternalEngine:
Screenshots and Videos |
TheBookOfBiz:
Screenshots and Videos |
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EternalEngine:
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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TheBookOfBiz:
Pricing
$0/month
Free tier - $0/mo (after the trial): 1 Active Student, Manual Session Logging, Basic Email Reminders. Solo Tutor - $14/mo: Up to 25 Active Students, One-Way Google Calendar Sync, Student Wallets & Invoices, Automated Email Reminders, Professional Booking Website. Pro Tutor - $24/mo: Unlimited Student Capacity, AI Progress Reports (Parent Summaries), AI Business Growth Suggestions, Priority Email Support, All Solo Features Included. Billed monthly only. 7-day free trial, no card required.
Free Version
Not Supported
Free Trial
Supported
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EternalEngine:
Reviews/
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TheBookOfBiz:
Reviews/
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EternalEngine:
Training
Documentation
Not Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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TheBookOfBiz:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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EternalEngine:
Company InformationEternalEngine
Founded: 2026
United States
eternalengineos.io/basic/
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TheBookOfBiz:
Company InformationCrewlabs.io
Founded: 2025
United States
thebookofbiz.com
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EternalEngine:
Alternatives |
TheBookOfBiz:
Alternatives |
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EternalEngine:
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TheBookOfBiz:
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EternalEngine:
Categories |
TheBookOfBiz:
Categories |
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EternalEngine:
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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TheBookOfBiz:
Tutoring Features
Appointment Scheduling
Supported
Attendance Tracking
Supported
Automatic Grading
Not Supported
Billing & Invoicing
Supported
Client Management
Supported
Electronic Assignments & Tests
Not Supported
Employee Management
Not Supported
Learning Plans
Not Supported
Lesson Notes
Supported
Online Classes
Not Supported
Online Payments
Not Supported
Parent / Student Portal
Not Supported
Progress Reports
Supported
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EternalEngine:
Integrations
Google Authenticator
Not Supported
Google Calendar
Not Supported
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TheBookOfBiz: | |||||
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EternalEngine:
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TheBookOfBiz:
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