Twoja apka ma 4.8 w App Store — ale nie umiesz opisać crash rate po angielsku

App Store Review odrzucił build z lakonicznym "your app crashes on launch on devices running iOS 17.4". Albo Twój klient z Londynu pyta na sprincie: "What's our retention rate after the last release?" — i zamiast płynnej odpowiedzi pojawia się cicha panika.

Jeśli jesteś iOS Developerem, Android Developerem, React Native Dev, Flutter Developerem lub Mobile Tech Leadem, poniższe terminy to Twoje codzienne słownictwo — na release notes, standup, App Store review i rozmowie z klientem.

Cykl życia aplikacji — 8 terminów

EN Term	PL	Przykład zdania
foreground	pierwszy plan	"The app re-fetches user data every time it returns to the foreground."
background	tło	"Location updates are processed in the background without waking the full app."
suspended state	stan zawieszenia	"The OS moves apps to a suspended state to free memory after 10 minutes of inactivity."
push notification	powiadomienie push	"Push notification delivery rate dropped to 78% — we need to investigate APNs errors."
deep link	głęboki link	"The marketing campaign uses deep links to take users directly to the promotion screen."
lifecycle methods	metody cyklu życia	"The data sync happens in onResume() — one of the core lifecycle methods in Android."
onboarding flow	przepływ onboardingu	"We A/B tested two onboarding flows — the shorter one improved day-7 retention by 11%."
app delegate	delegat aplikacji	"Remote notification handling is configured in the app delegate."

Wydajność — 9 terminów

EN Term	PL	Przykład zdania
crash rate	wskaźnik crashy	"Our crash rate spiked to 2.3% after the last release — above our 1% threshold."
ANR (App Not Responding)	aplikacja nie odpowiada	"The ANR occurs when the user tries to upload a file larger than 50MB on a slow connection."
frame rate (FPS)	liczba klatek na sekundę	"The animation drops below 30 FPS on older devices — we need to reduce the layer count."
jank	zacinanie animacji	"Users are reporting jank on the scroll list — profiling shows the cell renderer is blocking the main thread."
memory leak	wyciek pamięci	"The memory leak in the image cache is causing the app to crash after 20 minutes of heavy use."
battery drain	zużycie baterii	"The background location service is causing significant battery drain — we need to switch to geofencing."
cold start	zimny start	"We reduced cold start time by 40% by deferring non-critical initialisation to post-launch."
warm start	ciepły start	"Warm start time is under 300ms — well within the acceptable threshold."
app size	rozmiar aplikacji	"The app size grew to 180MB after adding the new SDK — we need to investigate asset compression."

Dystrybucja i architektura — 13 terminów

EN Term	PL	Przykład zdania
TestFlight	platforma beta Apple	"We have 200 external testers on TestFlight — build 1.4.2 goes out to them tomorrow."
beta testing	testy beta	"Beta testing revealed a critical edge case with offline mode that wasn't caught in QA."
release notes	informacje o wersji	"Release notes should focus on user-facing changes, not internal refactoring."
version bump	zwiększenie numeru wersji	"This is a patch — bump the version to 2.1.1 and update the build number."
code signing	podpisywanie kodu	"The build failed due to an expired code signing certificate — we need to renew it in the portal."
provisioning profile	profil inicjowania	"The device isn't registered in the provisioning profile — that's why the OTA install is failing."
build variant	wariant builda	"We have three build variants: debug, staging and release — each points to a different API environment."
rollout	stopniowe wdrożenie	"We'll do a staged rollout — 10% of users in the first 24 hours, 100% after 48 hours if metrics look clean."
MVVM	Model-View-ViewModel	"We migrated the legacy MVC screens to MVVM to improve testability."
clean architecture	czysta architektura	"Clean architecture separates concerns cleanly — domain logic has no dependency on the UI layer."
dependency injection	wstrzykiwanie zależności	"We use Hilt for dependency injection — it reduces boilerplate significantly compared to manual DI."
state management	zarządzanie stanem	"State management becomes complex once you have multiple async data sources updating the UI."
offline-first	podejście offline-first	"The app is designed offline-first — users can add items without a connection and they sync on reconnect."

Scenariusze komunikacji

a) App Store release notes i review response — 6 zwrotów

"We've addressed the crash affecting users on iOS 17.4 and improved cold start time by 40%."
"This release resolves the ANR reported by users on Android 12 when uploading large files."
"We appreciate your feedback. The issue you described has been fixed in version 2.1.1, now available on the App Store."
"Version 2.3.0 introduces offline mode, reduces app size by 25% and fixes three crash-causing edge cases."
"The battery drain issue was caused by background location polling — reduced from 15 seconds to 5 minutes in this release."
"The App Store review was rejected due to guideline 2.1 — missing privacy manifest for third-party SDKs."

b) Sprint review / demo dla klienta — 8 zwrotów

"In this sprint we shipped the onboarding redesign — day-1 completion rate improved from 61% to 79%."
"The cold start time is now under 800ms on a mid-range device — down from 1.9 seconds."
"We completed the migration to the new payment SDK — App Store review is pending."
"This feature is behind a feature flag — we'll enable it for 10% of users next week."
"The Android and iOS builds are now in feature parity — this was the main technical debt item from Q1."
"We ran the release on TestFlight for two weeks with 300 beta users — zero critical crashes."
"The new deep link routing supports all marketing campaign URLs and handles malformed links gracefully."
"Estimated release date is Thursday — pending App Store review, which typically takes 24 to 48 hours."

c) Raportowanie buga — 6 zwrotów

"The ANR occurs when the user tries to upload a file larger than 50MB on a slow connection — reproduced consistently on Android 13."
"Crash rate spiked to 2.3% within 2 hours of the release — we're rolling back to version 2.0.9."
"The memory leak is triggered by the image carousel when scrolling rapidly — heap grows by ~4MB per minute."
"The crash only affects devices with less than 2GB RAM — it's a null pointer exception in the cache initialisation."
"I've attached the crash logs and a Crashlytics report — the stack trace points to the network layer."
"The issue is device-specific — reproduced on Galaxy S10 and Pixel 4, but not on newer devices."

Krótki dialog — Mobile Dev raportuje crash team leadowi

Mobile Dev: "We have a P1 incident. Crash rate jumped to 4.1% thirty minutes after the release — Crashlytics is showing a null pointer exception in the session manager."

Team Lead: "Which devices are affected?"

Mobile Dev: "Primarily Android 11 and 12 — it looks like we're not handling the case where the token is null on cold start. It wasn't caught in QA because our test devices are all on Android 13."

Team Lead: "Can we hotfix it today?"

Mobile Dev: "Yes — the fix is a one-liner. I can have a build on TestFlight within the hour and submit to Google Play for expedited review."

Team Lead: "Do it. And initiate a rollback on the Play Console to limit exposure while the fix goes through review."

Najczęstsze błędy Polaków

1. "application" vs "app". Application brzmi formalnie i pojawia się w dokumentacji. W codziennej komunikacji z teamem mów app. ❌ "I need to test the application on a new device." → ✅ "I need to test the app on a new device."

2. "the phone" → "the device". Aplikacje mobilne działają na urządzeniach — telefonach, tabletach, zegarach. ❌ "The crash happens when the user locks the phone." → ✅ "The crash happens when the user locks the device."

3. "bug was fixing" → nieprawidłowa strona bierna. ❌ "The bug was fixing in the last release." → ✅ "The bug was fixed in the last release."

4. "we release" → "we ship". Ship jest bardziej naturalny w inżynieryjnym kontekście. ❌ "We release a new version every two weeks." → ✅ "We ship a new version every two weeks."

5. crash vs bug. Crash to nieoczekiwane zamknięcie aplikacji — specyficzny typ błędu. ❌ "We have a bug — the app crashes on startup." → ✅ "We have a crash on startup — null pointer in the session initialiser."

Quick Reference Table

EN Term	PL Tłumaczenie	Kontekst
foreground	pierwszy plan	lifecycle
background	tło	lifecycle
suspended state	stan zawieszenia	lifecycle
push notification	powiadomienie push	lifecycle
deep link	głęboki link	lifecycle
lifecycle methods	metody cyklu życia	lifecycle
onboarding flow	przepływ onboardingu	UX
app delegate	delegat aplikacji	iOS
crash rate	wskaźnik crashy	wydajność
ANR	aplikacja nie odpowiada	Android
frame rate (FPS)	liczba klatek/s	wydajność
jank	zacinanie animacji	wydajność
memory leak	wyciek pamięci	wydajność
battery drain	zużycie baterii	wydajność
cold start	zimny start	wydajność
warm start	ciepły start	wydajność
app size	rozmiar aplikacji	dystrybucja
TestFlight	platforma beta Apple	dystrybucja
beta testing	testy beta	dystrybucja
release notes	informacje o wersji	dystrybucja
version bump	zwiększenie wersji	dystrybucja
code signing	podpisywanie kodu	dystrybucja
provisioning profile	profil inicjowania	iOS
build variant	wariant builda	dystrybucja
rollout	stopniowe wdrożenie	dystrybucja
MVVM	Model-View-ViewModel	architektura
clean architecture	czysta architektura	architektura
dependency injection	wstrzykiwanie zależności	architektura
state management	zarządzanie stanem	architektura
offline-first	podejście offline-first	architektura

Podsumowanie

Angielski w mobile developmencie to nie tylko terminologia — to zdolność do precyzyjnego raportowania incydentów pod presją, pisania release notes trafiających do użytkownika i prowadzenia technicznego dialogu z klientem na sprincie.

Więcej słownictwa IT znajdziesz w artykule o słownictwie IT po angielsku. Jeśli pracujesz w środowisku wielojęzycznych teamów, sprawdź też Business English dla programistów.

Gotowe fiszki z terminologią mobile znajdziesz w ścieżce Mobile Developer w sekcji IT & Programowanie.

Angielski dla Mobile Developera — iOS, Android i React Native