The deterministic UI fuzzer for every platform.
A dead button, a frozen screen, a checkout that silently fails. To a user that's not an edge case, it's frustration, a one-star review, and a reason to leave.
Scripted tests cover the happy flow. The bugs that hit some users and not others live in the states, inputs, and tap orders you never thought to test.
Intermittent, device-specific, three taps deep. Without the exact seed, inputs, and state, you can't make it happen again, let alone fix it.
AI maps your UI into a graph it understands. A deterministic fuzzer drives that graph until something breaks, then seals each failure as evidence you can replay forever.
Anyone on the team runs it and watches the same failure happen, no special branch, no “works on my machine.”
The repro runs in CI. It stays red while the bug lives and flips green the instant your fix holds.
Seed, inputs and state are sealed in one portable file, attached to the PR, versioned with your code.
Pins randomness, time, and ordering so a captured failure replays bit-for-bit, every single run.
Seed, inputs, env and timing captured into one portable artifact you can commit, share, and re-run anywhere.
Understands tool calls, model sampling and multi-step plans, surfaces the failures black-box testing never finds.
Jump straight to the exact step the system broke. Inspect state, step backward, watch it fail in slow motion.
Drops a one-line repro into the pull request and gates the merge. Works with the pipeline you already run.
Wrap any binary, service, or agent runtime. If it has inputs and an exit code, Repro It can pin it.
Agents fail in ways unit tests were never built to catch, a tool called in the wrong order, a sampled token that cascades, a race three steps deep. Repro It pins the run so you can fix the cause, not chase the symptom.
The runner is free and source-available. The cloud is a paid, hosted service, usage-based on runs.
Run it yourself, on your machine and in CI.
For shipping teams.
More scale, plus mobile and SSO.
For regulated teams.
The CLI is free and available now. Cloud plans launch shortly; annual billing saves ~2 months. iOS device runs roll out on Team and Enterprise.
Install the CLI and pin your flakiest test or most haunted agent in minutes. Free and source-available.
Found a checkout race that fails ~1 in 12k runs. I captured it. Reproduce the exact failure locally: