Free tools for software-delivery teams
No signup. No tracking. Pure client-side calculators that teach the framework instead of selling you on it. Each one is calibrated against real team data.
Story-point estimator
Maps 5 dimensions of a story (complexity, scope, unknowns, dependencies, testing effort) to a Fibonacci estimate (1, 2, 3, 5, 8, or 13). Or flags it for splitting.
Framework: Teaches the 5-dimension framework: estimating effort directly collapses risk into a fake-precise number; estimating across independent axes produces calibrated results.
Calibrated against ~3,000 stories from Stride beta customers.
Open the estimatorSprint capacity calculator
Takes 6 inputs (team size, sprint length, PTO, meetings, on-call, velocity) and outputs realistic sprint capacity in points, with a breakdown of where time goes.
Framework: Naive capacity (team × days) overestimates by 40-50%. PTO + meetings + on-call rotation are the three biggest gaps; this calculator surfaces each so teams stop systematically over-committing.
Calibrated against ~400 sprint plans from Stride beta customers.
Open the calculatorPR review-time estimator
Estimates code-review wall-clock time + quality risk from a PR's size, files changed, tests, and cross-module scope. Outputs an easy / medium / hard / split tier.
Framework: PR size predicts review quality. Cohen 2006 + Bosu et al. 2017 + GitHub 2023 data converge: review quality drops sharply past 400 LOC, becomes essentially impossible past 800. The calculator quantifies it so teams can self-regulate.
Grounded in published research (Cohen 2006, Bosu 2017, GitHub 2023).
Open the estimatorAI delivery ROI calculator
Takes 4 inputs (team size, hourly cost, hours saved per week, monthly seat fee) and outputs annual savings, cost, ROI multiple, and payback days. Conservative defaults.
Framework: Hours saved × hourly cost minus seat fees. Marketing-leaning, we say so on the page, but every input is yours to control. Defaults reflect mid-market US engineering economics with conservative hours-saved (5/week, the low end of Stride beta telemetry).
Hours-saved range from telemetry across 5,200 stories on Stride beta customers.
Open the calculatorDORA metrics calculator
Enter the four DORA inputs (deploys/month, lead time, MTTR, change failure rate) and get composite Elite / High / Medium / Low tier with per-dimension explanation.
Framework: DORA's honest framing: your composite tier is bounded by your weakest dimension, not the average. Calibrated against Google's 2024 State of DevOps thresholds; each tier comes with a one-sentence explanation citing the underlying threshold.
Thresholds from Google's 2024 State of DevOps report.
Open the calculatorADR generator
Fill in context, decision, alternatives considered, and consequences. Get a Michael-Nygard-style ADR in markdown that you can copy or download.
Framework: The 4-section ADR (context / decision / alternatives / consequences) is the canonical format for capturing architecture decisions. The generator enforces the structure so the rationale survives team changes.
Format from Michael Nygard, 2011. Used by thousands of engineering teams.
Open the generator