Ijharul Islam
Founder, CrewRobin
Ijharul Islam is the founder of CrewRobin, the AI front office and field service software for small HVAC, plumbing, electrical and roofing shops. He writes guides on pricing jobs, estimates and invoices, answering and booking calls, local marketing and comparing field service software.
95 guides on CrewRobin · Also writes on Medium
Pricing, estimates and getting paid
- HVAC Flat Rate Pricing: The Formula, a Worked Example and How to Build Your Price Book
- Customer Financing for Contractors: Fees, Rules and Math
- How to Raise Prices as a Contractor: Math, Letter, Scripts
- How to Price Generator Installation: An Electrician's Guide
- How to Price a Repipe: A Plumber's Guide to PEX and Copper
- How to Price Sewer Line Replacement: A Plumber's Guide
Calls, texting and booking
- Seasonal Maintenance Reminder Schedule for HVAC and Plumbing
- Text Messaging for Plumbing Companies: Templates and Rules
- 10DLC Registration for Contractors: Business Texting Rules
- Missed Call Text Back Message Templates for Contractors: 22 Ready-to-Send Texts
- HVAC and Plumbing Call Booking Script: Word-for-Word Inbound Script, Objections and Emergency Questions
- How to Handle After-Hours Calls for Plumbing and HVAC: Options, Costs, On-Call Pay and Pricing
Marketing, leads and reviews
- Are Angi Leads Worth It? Costs, Credits and Break-Even Math
- Yelp for Contractors: Ads, Request a Quote and Review Rules
- Contractor Website Checklist: 16 Must-Haves That Win Calls
- Storm Damage Roofing Leads: Where to Find Them, Legally
- Nextdoor Marketing for Contractors: Setup, Posts and Ads
- How to Handle Customer Complaints as a Contractor
Running a trade business
- HVAC and Plumbing Dispatcher Job Description (Template)
- Plumbing Truck Stock List: What a Plumber Should Carry
- HVAC Truck Stock List: What to Carry and How to Restock
- Lockout Tagout for Electricians: Steps, Rules, Template
- Roofing Insurance Claims Process for Contractors
- How to Start a Backflow Testing Business (2026 Guide)
Field service software pricing and alternatives
- Workiz Pricing 2026: Quote-Only Plans, the Prices It Briefly Showed, and What to Ask
- ServiceTitan Pricing 2026: What's Public, What Isn't, and What to Ask For
- ServiceTitan Alternatives for Small Shops: 8 Options With Published Prices or Shorter Commitments (2026)
- Jobber vs Housecall Pro (2026): Price by Team Size, Features by Plan, and Which to Pick
- Jobber Pricing 2026: Every Plan, Monthly vs Yearly, Per-User Costs and Add-ons
- The Best Jobber Alternatives for Small HVAC, Plumbing and Electrical Shops (2026)