TheBookOfBiz

TheBookOfBiz

Crewlabs.io
EternalEngine TheBookOfBiz

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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.
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.
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
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
EternalEngine:

Audience

Service businesses and small businesses
TheBookOfBiz:

Audience

Private tutors in any subject (academics, music, test prep, languages) who currently rely on spreadsheets or manual notes.
EternalEngine:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported
TheBookOfBiz:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
EternalEngine:

API

Offers API Not Supported
TheBookOfBiz:

API

Offers API Not Supported
EternalEngine:

Screenshots and Videos

TheBookOfBiz:

Screenshots and Videos

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
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
EternalEngine:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
TheBookOfBiz:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
EternalEngine:

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
TheBookOfBiz:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
EternalEngine:

Company Information

EternalEngine
Founded: 2026
United States
eternalengineos.io/basic/
TheBookOfBiz:

Company Information

Crewlabs.io
Founded: 2025
United States
thebookofbiz.com
EternalEngine:

Alternatives

TheBookOfBiz:

Alternatives

Pillar OS

Pillar OS

Kalbot Solutions
EternalEngine:
TheBookOfBiz:
EternalEngine:
TheBookOfBiz:
myTutoring

myTutoring

Vagupu
EternalEngine:
TheBookOfBiz:
TutorKit

TutorKit

e-way.gr
EternalEngine:
Atlas Solo

Atlas Solo

MARUPA
TheBookOfBiz:
Rocket Cat ACT

Rocket Cat ACT

Rocket Cat Learning
EternalEngine:

Categories

TheBookOfBiz:

Categories

Tutoring Supported
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
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
EternalEngine:

Integrations

Google Authenticator Not Supported
Google Calendar Not Supported
TheBookOfBiz:

Integrations

Google Authenticator Supported
Google Calendar Supported
EternalEngine:
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TheBookOfBiz:
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