Coretool WorkCentral

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Coretool:

About

Coretool is a browser-based invoicing application for German businesses, freelancers, sole traders, tradespeople, and small service businesses. Users can create and manage quotes and invoices, including XRechnung and ZUGFeRD e-invoices, track customers, send payment reminders, and organize appointments. The app supports GiroCode QR codes, digital quote signatures, and validation of e-invoice documents through its REST API. API-based workflows can connect with automation tools such as Make, Zapier, and n8n; availability of some platform-specific modules may depend on approval. Calendar feeds can be added to Google, Apple, or Outlook calendars. The optional Kalkulations-Assistent supports project estimates, material and labor calculations, and quote creation. Coretool runs in a web browser without local installation. Its free plan allows three invoices per month; Solo costs €9/month plus VAT and can be canceled monthly.
WorkCentral:

About

WorkCentral connects the full freelance workflow in one platform — from quote to payment. Most freelancers juggle separate apps for quotes, projects, time tracking, and invoicing, then spend hours moving data between them. WorkCentral eliminates that. Write a quote with AI-drafted line items. Client accepts, project with tasks is auto-created. Track time, generate an invoice with one click. Clients pay online via Stripe. Built by a CTO who freelanced for 15+ years and got tired of losing 5-6 hours a week to admin across five disconnected tools. Features include AI quoting, automatic quote-to-project conversion, time tracking, smart invoicing with automated reminders, online payments, expense tracking, reports, and team management. Free plan available. Early users get founder pricing — first year free, then 50% off for life.
Coretool:

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
WorkCentral:

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
Coretool:

Audience

Businesses, freelancers and sole traders in Germany that need to issue e-invoices (XRechnung, ZUGFeRD)
WorkCentral:

Audience

Freelancers, Consultants, and Project Managers
Coretool:

Support

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

Support

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

API

Offers API Supported
WorkCentral:

API

Offers API Not Supported
Coretool:

Screenshots and Videos

No images available
WorkCentral:

Screenshots and Videos

No images available
Coretool:

Pricing

€0/month
The free plan includes up to 3 invoices per month. Solo costs €9/month plus applicable VAT and can be canceled monthly.
Free Version Supported
Free Trial Not Supported
WorkCentral:

Pricing

$18/month
Free Version Supported
Free Trial Not Supported
Coretool:

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
WorkCentral:

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
Coretool:

Training

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

Training

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

Company Information

Coretool
Germany
coretool.de/en
WorkCentral:

Company Information

WorkCentral
Founded: 2026
United States
workcentral.app
Coretool:

Alternatives

E‑Rechnungs-Studio

E‑Rechnungs-Studio

Casserus UG (haftungsbeschränkt)
WorkCentral:

Alternatives

Coretool:
WorkCentral:
Coretool:
WorkCentral:
Coretool:
xSuite

xSuite

xSuite Group
WorkCentral:
Coretool:
Facturwise

Facturwise

Billio Software Services s.r.o.
WorkCentral:
Billbooks

Billbooks

Billbooks Pty Ltd
4.8 out of 5 stars
Coretool:

Categories

E-Invoicing Supported
WorkCentral:

Categories

Coretool:

Integrations

Apple Calendar Supported
Google Calendar Supported
Make Supported
Microsoft Outlook Supported
Zapier Supported
n8n Supported
WorkCentral:

Integrations

Apple Calendar Not Supported
Google Calendar Not Supported
Make Not Supported
Microsoft Outlook Not Supported
Zapier Not Supported
n8n Not Supported
Coretool:
Claim Coretool and update features and information
Claim Coretool and update features and information
WorkCentral:
Claim WorkCentral and update features and information
Claim WorkCentral and update features and information