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Christoph Kay

repleno Founder
Christoph Kay

Christoph worked as an electronics technician in industry for five years and experienced firsthand how missing small parts can slow down processes. Later, as a project manager at P.S. Cooperation GmbH (Böllhoff Group), he introduced digital procurement processes for recurring parts at medium-sized companies and corporations. Today, he is building repleno to largely automate the procurement of consumables in small businesses.

Posts

Cover Image for Automatic Material Ordering in Trades: Guide 2026

Automatic Material Ordering in Trades: Guide 2026

Automatic material ordering in trades: how reorder points work, what it costs, and how you cut ordering time, errors, downtime, and overstock in your business.

Cover Image for Digitizing Inventory Management in 5 Steps (No ERP Needed)

Digitizing Inventory Management in 5 Steps (No ERP Needed)

Digitize inventory in 5 steps: structure locations, record items, connect suppliers, set reorder points, and engage your team effectively. No ERP required.

Cover Image for Calculating the Hourly Charge-Out Rate: Formula, Example, and Typical Mistakes

Calculating the Hourly Charge-Out Rate: Formula, Example, and Typical Mistakes

Calculate the hourly charge-out rate in craftsmanship: With formula, step-by-step example, and the 5 most common calculation mistakes. Incl. table by trade 2026.

Cover Image for Goods Receipt in a Trades Business: Process, Checklist, and Common Mistakes

Goods Receipt in a Trades Business: Process, Checklist, and Common Mistakes

Goods receipt in trades businesses: 5-step process, practical checklist, and the 3 most costly mistakes in delivery acceptance and incoming goods inspection.

Cover Image for Excel Inventory Management Alternative: Why Spreadsheets Fail in the Trades

Excel Inventory Management Alternative: Why Spreadsheets Fail in the Trades

Still using Excel for inventory? Learn why spreadsheets fail in the trades, and how mobile scanning plus automatic reordering saves time and prevents shortages.

Cover Image for Sortly Alternative Germany: Comparison with repleno 2026

Sortly Alternative Germany: Comparison with repleno 2026

Looking for a Sortly alternative in Germany? We compare Sortly and repleno: Features, pricing, GDPR compliance, and suitability for the German trades. Find out which inventory app is the best choice f...

Cover Image for Best Inventory Management Apps for Trades 2026: 6 Tools Compared

Best Inventory Management Apps for Trades 2026: 6 Tools Compared

Top 6 inventory management apps for trades in 2026 compared: repleno, Sortly, Lager im Griff, HERO, openHandwerk and Inventorum. With criteria, pricing and a GDPR check.

Cover Image for Consumables in Trades: Why the Stockroom is Always Empty

Consumables in Trades: Why the Stockroom is Always Empty

Managing consumables in trades: Why notes and verbal orders fail, what the chaos costs, and which systems really work. With decision aid.

Cover Image for Kanban in the Trades Stockroom: Simply Explained with Practical Examples

Kanban in the Trades Stockroom: Simply Explained with Practical Examples

Kanban in trades: Two-bin system, practical examples for electrical, HVAC, and painters, introduction in 5 steps. With comparison to Min-Max.

Cover Image for Scan-to-Order in the Trades: Definition, Meaning, and Limitations

Scan-to-Order in the Trades: Definition, Meaning, and Limitations

Scan-to-Order in the trades explained: meaning, process logic, and limitations. Why reactive barcode ordering is often too late—and which alternatives intervene earlier.

Cover Image for Consumables Calculation: How to Determine Daily Usage Correctly

Consumables Calculation: How to Determine Daily Usage Correctly

How do you calculate daily usage of consumables in the trades? Formulas, methods and practical examples for reorder point and stock coverage – with concrete calculation examples for electrical, HVAC a...

Cover Image for Name Bin Locations in the Trades: Z-R-E-F System Step by Step

Name Bin Locations in the Trades: Z-R-E-F System Step by Step

Name bin locations systematically with Z-R-E-F: introduce a naming convention, avoid common mistakes, 8-step guide + mini audit for your trade warehouse.

Cover Image for Reorder Point Method vs. Min-Max – The Ultimate Comparison of Inventory Control Models (2026 Guide)

Reorder Point Method vs. Min-Max – The Ultimate Comparison of Inventory Control Models (2026 Guide)

Reorder Point Method vs. Min-Max explained: Differences, advantages, disadvantages, calculation examples & practical tips for optimal inventory control.

Cover Image for RFID vs Barcode vs QR Code: Which Technology Fits Your Business?

RFID vs Barcode vs QR Code: Which Technology Fits Your Business?

RFID vs Barcode vs QR Code for SMBs: costs, day-to-day practicality, and common pitfalls in the trades. Hands-on comparison with a decision flow and concrete examples.

Cover Image for Small Load Carriers (SLC) in Warehousing & Production: Standards, ESD, Automation

Small Load Carriers (SLC) in Warehousing & Production: Standards, ESD, Automation

Why Small Load Carriers (SLC) save time: Euro grid, VDA poolability, ESD options and robotics readiness — plus practical tips for DGUV safety

Cover Image for How to Label Your Shelves Correctly? Shelf Labels for Small Warehouses in 3 Steps (2025)

How to Label Your Shelves Correctly? Shelf Labels for Small Warehouses in 3 Steps (2025)

Create shelf labels for small warehouses in 3 steps. Free tools, templates and tips for trades & workshops. Incl. barcode guide 2025.

Cover Image for Procurement Methods for Consumables in Crafts: Terminology, Examples and Decision Support (2025)

Procurement Methods for Consumables in Crafts: Terminology, Examples and Decision Support (2025)

Procurement methods for craft businesses explained: Reorder point, Min/Max, Kanban, VMI. With decision support, practical setup and FAQ. Avoid chaos now.

Cover Image for Min-Max Inventory Management for Trades & Crafts: Practical Guide 2026

Min-Max Inventory Management for Trades & Crafts: Practical Guide 2026

How does min-max inventory management work in trades? This practical guide shows calculations, software integration and common mistakes – with examples from electrical, HVAC and carpentry.

Cover Image for The Best Inventory Management in Trades Without ERP: Ultimate Guide 2026

The Best Inventory Management in Trades Without ERP: Ultimate Guide 2026

Material losses, ordering stress & paper-based processes adieu: Modern inventory management for trade businesses without ERP complexity. With mobile app, automatic alerts & reorders. Guide 2026 with e...

Cover Image for Digital Procurement in the Trades: 12 Strategies for Automated Materials Management

Digital Procurement in the Trades: 12 Strategies for Automated Materials Management

Learn how trade businesses can save up to 25% on material costs through digital procurement. A practical guide with real-world examples and step-by-step implementation.

Cover Image for Stockroom Organization in the Trades: The Complete Guide 2026

Stockroom Organization in the Trades: The Complete Guide 2026

Stockroom organization in the trades 2026: ABC analysis, Kanban, min-max stock, ground zero reset, van inventory and digital tools. With IHK data and practical tips.

Cover Image for What Does a Master and Journeyman Hour Cost in Craftsmanship in 2026?

What Does a Master and Journeyman Hour Cost in Craftsmanship in 2026?

Current overview of master and journeyman hourly rates for 2026: From roofers to electricians, what costs are incurred in various trades and how the hourly rates are calculated. Includes the definitio...

Cover Image for Trades 2030: How Businesses Can Survive the Skilled Worker Shortage

Trades 2030: How Businesses Can Survive the Skilled Worker Shortage

What will the skilled trades look like in 2030? Despite a shortage of skilled workers, there are paths to success: AI, digital tools, efficient material management, and collaborations will secure the ...

Cover Image for Missing Materials Cost Tradespeople Thousands of Euros Per Year

Missing Materials Cost Tradespeople Thousands of Euros Per Year

Material shortage is a costly problem for trades businesses. We show how automatic reordering reduces costs and increases productivity.

Cover Image for Digital Gap in Craft Businesses: Why Procurement Often Falls Behind

Digital Gap in Craft Businesses: Why Procurement Often Falls Behind

Many craft businesses recognize digital opportunities but fail in implementation. Especially procurement remains analog – with consequences for productivity and costs.

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