01
One suite, web and mobile
MobileBoost stops at iOS and Android. If your product also runs in a browser, you buy a second tool and keep two suites. Momentic runs web, iOS and Android from the same YAML and the same CLI.
comparison
/ momentic-vs-mobileboost
Momentic vs MobileBoost
MobileBoost, also sold as GPT Driver, is a mobile test agent with deep device features. Momentic covers web, iOS and Android in one suite, and the tests are YAML files in your repo.
Web, iOS and Android · CLI · CI · MCP
At a glance.
How Momentic and MobileBoost compare across the dimensions teams evaluate most.
| Category | Momentic | MobileBoost |
|---|---|---|
| Founded | Y Combinator W24 | Y Combinator, mobile only |
| Platforms | Web, iOS and Android in one suite | iOS and Android; no web |
| Authoring | Cursor, Claude Code or Codex write the YAML into your repo over MCP; the CLI runs it | Agent skills and a REST API, plus a no-code visual editor |
| Who edits a test | Engineers and coding agents, in the repo | Product managers and QA analysts, in QA Studio, with a step recorder |
| Where tests live | YAML files in your repo, reviewed in the pull request | Their platform. Each test is a record you change through their REST API |
| Device features | Hosted simulators and emulators, hundreds in parallel | Real and virtual devices, offline mode on iOS simulators, App Clips, camera injection, audio capture |
| Scale | Thousands of parallel browsers, hundreds of parallel simulators and emulators | Over 100 parallel device setups, mobile only |
| Track record | Notion, Retool, Webflow, Xero and Quora run on Momentic | Duolingo reports 70 percent fewer manual regression tests |
| Best fit | One suite for web and mobile, written by your coding agents | Mobile-only teams who need a specific simulator feature |
What MobileBoost does
MobileBoost, which also sells as GPT Driver, is a mobile test agent for iOS and Android. It reads a pull request, generates or extracts the test cases, runs them on simulators or real devices, and posts pass or fail back to CI status checks. Its device layer covers offline mode on iOS simulators, App Clips without TestFlight, camera injection, audio capture and injection, network mocking, and over 100 parallel device setups. Duolingo reports a 70 percent cut in manual regression tests with it. It ships coding-agent skills and a REST API for machine authoring, plus a no-code visual editor so product managers and QA analysts can edit the generated tests. It does not test the web.
Where Momentic differs.
02
The test is a file you own
With MobileBoost, each test is a record in their platform, and you change it through their REST API. Their test-generation endpoint commits the automation code to their test repository. A Momentic test is a YAML file in your repo, so a change shows up as a diff in the pull request, and your coding agent edits the file directly.
03
Written by engineers and coding agents
MobileBoost's visual editor lets product managers and QA analysts edit a test, and its engineer path is an SDK around the XCUI, Espresso or Appium suite you already maintain. Momentic replaces that suite. Engineers and coding agents write plain-English steps in the repo, so you maintain no native test code.
04
The run recovers instead of failing
Momentic re-resolves a moved target during the run, retries through the transient failure, and writes the repair back to the YAML, so a redesign does not turn into a queue of broken tests. Repeat steps replay from a cache of the signals it used, with no model call, and over 99% of steps finish in under 500ms, so a large mobile suite stays fast and repeatable.
05
Proven at enterprise scale
Notion, Retool, Webflow, Xero and Quora gate releases on Momentic, across thousands of parallel browsers and hundreds of parallel simulators and emulators. Quora cut a 7-hour QA pass to 30 minutes, so the suite now runs on every merge instead of once a release.
06
The mobile login is in the test
Momentic provisions an inbox and a phone number that a JavaScript step can read inside a mobile test, so a one-time code, a magic link or a 2FA prompt does not stop the run. The same step can call your API to put the account in the state the test needs.
07
The step sees more than a screenshot
Momentic resolves each step against a screenshot, the accessibility tree, and the DOM on web or the screen XML on mobile, and infers from the step description which signal matters. 'The Sign in button' resolves from accessibility attributes and text. 'The red Cancel button below the order summary' resolves from position and pixels. An element the screenshot does not show, or two that look alike, still resolves, and AI assertions read the same three sources.
08
The agents learn your product
The knowledge base holds your terminology, rules for a specific agent and your known flows, and every AI-assisted step retrieves the relevant entries. Memory feeds the agent its own decisions from past runs, so 'the selected tab' resolves the same way this week as it did last week. The suite gets more consistent the longer it runs.
09
Mo finds the bugs no test covers yet
Mo takes a target and a brief, plans the test cases, and runs each one in its own hosted browser, simulator or emulator, a hundred or more at once. A suspected bug goes to a reproducer agent that starts from a clean session, and only a reproduced bug reaches the report, with a recording and repro steps. One session ran 116 agents and returned 27 bugs. Point it at the same iOS or Android build your tests install.
Ten ways to test a mobile app.
MobileBoost is one of several ways to test a mobile app. Where the test lives decides who can change it, and how it reaches the merge gate.
| Tool | Authoring | Runs on | Best fit |
|---|---|---|---|
| Momentic | Plain-English steps as YAML in your repo, written by your coding agent over MCP and run by the CLI | Cloud browsers, iOS simulators and Android emulators. Hundreds of simulators and emulators, thousands of browsers in parallel | Authoring and execution from one place, gated in CI |
| MobileBoost (GPT Driver) | Their platform holds each test as a record. You change it through their REST API, or record it in their no-code editor | iOS and Android; simulators and real devices, 100+ in parallel | Mobile-only teams who need simulator features nobody else exposes |
| Autosana | Natural-language flows in their dashboard. You can opt a repo in to files, and the sync copies them on the default branch only | iOS, Android, mobile web and desktop web; local and cloud runs | Small teams who want the agent to close the loop |
| Maestro | YAML flows | Simulators, emulators and devices; local or Maestro Cloud | Mobile teams who want readable flows and a fast local loop |
| Appium | Code, on WebDriver | Runs wherever you host it, including the clouds above | The suite most device clouds are bought to execute |
| BrowserStack | None. Bring your own tests | Real browsers, real iOS and Android devices, manual live sessions | Coverage on a specific real device or an old browser |
| Sofy | No-code editor, recorded on real devices | iOS and Android on a real-device cloud | QA teams who record on hardware |
| Waldo (now part of Tricentis) | Recorded sessions, no-code steps | iOS and Android | Recorder teams inside a Tricentis estate |
| mabl | Low-code recorder aimed at non-technical authors | Vendor cloud | One vendor for authoring and running, on a credit model |
| testRigor | Plain-English scripts in a vendor web app | Web and mobile; vendor cloud | Teams who accept tests living outside version control |
Who should choose which.
Choose Momentic
Choose Momentic if one team owns web and mobile quality, and the suite belongs in your repo where engineers and coding agents read it. Notion, Retool, Webflow, Xero and Quora gate releases on Momentic, across thousands of parallel browsers and hundreds of parallel simulators and emulators.
Choose MobileBoost
Choose MobileBoost if a simulator feature we do not expose decides the test, such as offline mode, App Clips or camera injection.
Trusted by teams who made the switch.
“Momentic gave us a fast and reliable way to validate Poe.com's AI responses, even when they weren't deterministic.”
Momoko F. Head of Product Operations, Quora
30 min
daily test execution, down from 7 hours
500+
manual test cases replaced
100%
critical tests created in one month
Frequently asked questions.
Is MobileBoost the same product as GPT Driver?
Yes. MobileBoost sells the same mobile test agent under the GPT Driver name, and mobileboost.io carries both.
Does MobileBoost test web apps?
No. MobileBoost covers iOS and Android. Momentic covers web, iOS and Android from one suite.
Can my coding agent write MobileBoost tests?
Yes. MobileBoost ships agent skills and a REST API. The difference is the storage: MobileBoost keeps the test in the platform, and Momentic writes a YAML file into your repo over MCP.
Which one runs in CI?
Both. MobileBoost posts status checks from its own workflow. Momentic runs in your pipeline, returns a non-zero exit code, writes JUnit XML, and the Momentic GitHub App posts a status comment on the pull request.
Does Momentic support real devices?
No. Real devices are not supported. Momentic runs hosted simulators and emulators, or the local AVDs and simulators on your machine. MobileBoost offers physical devices.
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