Semaloop vs Maestro
Maestro is a YAML-driven mobile UI testing framework built for readable, declarative flows. Semaloop runs plain-English tests on real iPhones and Android emulators against every build you ship.
What Maestro is
Maestro describes mobile UI tests as YAML flows — tap this, assert that is visible — with built-in tolerance for flakiness and a fast local feedback loop. It is markedly simpler to live with than Appium while remaining a written, element-addressed suite.
Where they differ
| Semaloop | Maestro | |
|---|---|---|
| How a test is written | Plain English describing the outcome | YAML steps naming the elements to act on |
| Who decides the steps | The agent, fresh on each run | The author, fixed at write time |
| When the UI changes | The description usually still holds | The flow is edited where elements moved |
| Running on every build | Automatic from TestFlight, or an APK pushed from CI | You wire it into CI yourself |
| Non-visual checks | Audio and on-screen state are both in scope | UI assertions |
Choose Maestro if
- You want tests versioned in your repo, reviewed in pull requests, and runnable offline on a laptop.
- Your flows are stable and short, and YAML is a fair description of them.
- You want an open-source tool with no per-execution cost.
Choose Semaloop if
- Your flows are long or stateful enough that enumerating each step is the expensive part.
- You want a run per build without maintaining the CI wiring for it.
- You need checks that go beyond what is on screen, such as what the app is playing.