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Staying on an old React Native version feels safe, until a library drops support, or the App Store rejects your build. Takeaway: ...

Building, signing, and uploading two apps by hand for every release is slow, and one typo away from disaster. So you automate ...

Push to main, and ten minutes later testers have a signed build on their phones. Here's exactly how to set that up. Takeaway: ...

Clone a React Native repo, run one install command, and hundreds of packages appear at exactly the right versions. One file ...

A broken build should never reach a tester, let alone the store. Automated tests in the pipeline catch it first. Takeaway: Tests are ...

Every library you import ships to every user, and every listener you forget keeps eating memory. Two silent performance killers.

Swap your database, change your API, even rewrite your UI, and your business rules don't change a single line. That's the ...

Apple's review process is stricter than Google's. Miss one requirement, and your build comes back rejected. Takeaway: App Store ...

Every unit test passes, and the login flow is still broken. Only a test that drives the real app, like a real user, catches that.

Async doesn't mean free. Too many promises can freeze a React Native app just as surely as a blocking loop. Takeaway: Keep ...

Upgrading from two point five to three point zero might break your app. Two point five to two point six shouldn't. Takeaway: ...

Performance in React Native starts before your first line of code runs, in the engine that executes it. Then it's all about re-renders.

Your animation looks fine, then stutters for a moment. That moment has a name, and a precise number behind it. Takeaway: At 60 ...

Touching the real screen is expensive. So React first works on a cheap copy in memory, and only then touches the real thing.

Three API calls one after another take three times as long. Run them together and you only wait for the slowest. Takeaway: Run ...

A refresh token sitting in plain text on a device is an account takeover waiting to happen. Both platforms give you a vault.

Don't load the admin panel for a user who will never open it. And don't make them tap load more to see the next page. Takeaway: ...

The interviewer stops asking definitions, and asks: your app feels laggy, what do you do? This is where offers are won. Takeaway: ...

Apple has introduced iPhone Duo, its first foldable iPhone, bringing a completely new form factor and new possibilities for iOS ...

FlatList is built for huge lists. So why does yours still stutter when you scroll? Takeaway: Fast FlatLists = memoized rows + stable ...