Ethan Zhou

Tech + Stocks

[Ethan Zhou @ethanzhou]

@imethanchoi goated ethan

[Ethan Zhou @ethanzhou]

@diegocabezas01 thank you

[Ethan Zhou @ethanzhou]

were they not already the same thing?

[Diego | AI 🚀 - e/acc @diegocabezas01]

Codex will be merged into ChatGPT

[Ethan Zhou @ethanzhou]

@diegocabezas01 Ohhh, the apps will be merged together?

[Ethan Zhou @ethanzhou]

@b_nnett Well done, always fun to see projects like this on x!

[Ethan Zhou @ethanzhou]

@OpenAI

[Ethan Zhou @ethanzhou]

@stspanho This is really insane, so many applications with a IRL HUD

[Ethan Zhou @ethanzhou]

Long overdue

[hayden @hxxwhite]

Your app does a thousand things under the hood you never got to see.

Until now. Every network call. Every frame drop. Every byte of SQLite touched and mutated.

You, your team, your agents. Nobody flies blind anymore.

[Ethan Zhou @ethanzhou]

ship it. ship it. ship it. oh no. ship it.

[Ethan Zhou @ethanzhou]

@HaroutKhack bro is so big he must bring his own bar

[Ethan Zhou @ethanzhou]

@kaanbiryol @LandseerEnga We can set you up with some free credits if you guys want to try it out!

[Ethan Zhou @ethanzhou]

We've heard wild stories.

One company had designers piling into a meeting room every week just to manually check that engineers had implemented the Figma designs correctly.

[Landseer Enga @LandseerEnga]

Excited to share what the team’s been working on the past month.

Introducing: Atlas 🌍

For far too long, mobile apps have lacked a design source of truth.

We've heard this from company after company: no one knows what the app really looks like.

And now that coding agents have made changes 10x faster, keeping up manually is impossible.

So we made a map of all the screens in your app, automatically updated.

[Ethan Zhou @ethanzhou]

@LandseerEnga Lets gooooo

[Ethan Zhou @ethanzhou]

this is why good instrumentation is so important

[Raúl Galera @raulgalerad]

this was one of the most interesting reddit posts i've seen in reddit marketing in a long time. traditional search is so dead.

[Ethan Zhou @ethanzhou]

phoneception

[Anam Hira @anamhira]

wrote a new feature into my app from my phone.

knowledge work is moving to the phone

[Ethan Zhou @ethanzhou]

@LandseerEnga beauty

[Ethan Zhou @ethanzhou]

watch my coding agent work on an iOS app without ever opening xcode.

this is the future mobile dev.

demo:

[hayden @hxxwhite]

Your test passed... but did the data actually persist?

Scrub your app's real sqlite + local state across every run. You and your agents finally see and verify what's under the hood.

[Revyl @tryrevyl]

selector-based mobile tests break the second someone renames a button.

we use vision because tests should care what users see, not what the dom says.

[Landseer Enga @LandseerEnga]

everyone in iOS development should watch this. seriously, it might change the whole industry.

i pointed claude code at a live ios device running on revyl, typed "test everything," and walked away.

here's what's actually happening:

① you don't write the tests.

no scripts, no selectors, no test plan. i never told it which screens to open or what to check. it read the app, decided what mattered, and tested it. the entire instruction was "test everything."

② it built its own test team.

it looked at the app, clocked that it's basically four mini apps (rides, delivery, services, account), and split itself into 4 agents, one per surface. scoping coverage like that is usually a person's whole afternoon. it did it in seconds, unprompted.

③ all four ran at the same time, each on its own live device.

this is where revyl comes in. every agent gets its own live ios session in the cloud, so four running apps get tested in parallel instead of taking turns on one simulator. serial testing turns coverage into a time tax. running all of it at once removes the tax.

④ it tests like a person, not like a script.

each agent drives the app the way a user would, taps through the flows, and visually checks each screen against what it expected to see. nothing is pinned to a brittle element id, so renaming a button doesn't take down half your suite. that one detail is the most annoying thing about how we test today, and it just quietly goes away.

⑤ no xcuitest, no sims melting your laptop.

i didn't write a single xcuitest script, and there were no simulators booting on my machine. the agents run on cloud devices, so coverage stops being capped by what your laptop can handle.

the part that got me isn't that an agent tested an app. it's that i never told it how. i handed it a device and an intent, and it figured out the scoping, the parallelizing, and the driving on its own.

if you still write and maintain mobile ui tests by hand, i'm not sure that lasts the year.