Free tools
Tools for product and engineering teams
Free online utilities for agile teams, made by ISTRALLEN. No sign-up, no ads.
Project planning
AI Technical Spec Generator
Describe your product idea and get a first-draft spec: roles, MVP features, data, integrations, open questions and a ballpark in hours.
Project planning
Backend Development Estimate
Pick APIs, integrations, payments, search and deployment, and get a ballpark in hours with a breakdown.
Project planning
In-house vs Outsourcing Cost Calculator
Hire a developer or work with a contractor? Compare the full cost on your numbers, with hiring time, ramp-up and idle time included.
AI in support
AI Support ROI Calculator
Will a support bot pay off for you? Three scenarios on your numbers, with fees, upkeep and handoffs counted, and a platform next to a custom bot.
Agile planning
Sprint Forecast Calculator
Turn story points and velocity into a release date with 50, 85 and 95% confidence.
Agile estimation
Planning Poker
Estimate stories with your team in real time. Hidden votes, simultaneous reveal, stats and CSV export.
Distributed teams
Time Zone Meeting Planner
See working hours across cities side by side, find a time that works for everyone and send a calendar invite.