Overview › APK Size & Resource Hygiene
APK Size & Resource Hygiene
Detailed static-analysis report for apk size & resource hygiene.
Executive summary
The Costco APK / App Bundle ships both Coil and Glide for image loading, both Volley and Retrofit/OkHttp for HTTP, and both DBFlow and Room for persistence — duplicate stacks add real megabytes. ML Kit (barcode + text recognition), 11 Adobe Marketing Cloud modules, and 693 locale-resource directories also contribute. ABI splits and per-language bundle splits are not configured, so the APK is single-universal and untrimmed for global distribution.
Resource inventory
Drawable files
842
431 PNG · 411 XML vector
strings.xml entries
439
(main module values/)
colors.xml entries
69
Locale folders
693
Across all modules
External deps
126
Distinct in libs.versions.toml
values-night/
2
geofence + productdetaillanding only
Heavy dependencies (estimated APK contribution)
Rough order-of-magnitude estimates based on typical install sizes. Real numbers can be verified with ./gradlew :Costco:bundleRelease + bundletool build-apks.
| Dependency | Version | Est. impact | Status |
|---|---|---|---|
| Glide + Coil (dual) | 5.0.5 / 2.7.0 | ~3-4 MB redundant | REMOVE ONE |
| Volley + Retrofit/OkHttp (dual) | 1.2.1 / 3.0.0 / 5.3.2 | ~1-2 MB redundant | REMOVE VOLLEY |
| Room + DBFlow (dual) | 2.8.4 / 4.2.4 | ~1 MB + duplicate codegen | REMOVE DBFLOW |
| Adobe Marketing Cloud (11 modules) | BOM 3.17.0 | ~2-3 MB | Required by analytics; consolidate if possible |
| ML Kit barcode + text recognition | 17.3.0 / 16.0.1 | ~4-5 MB | Use Play-on-demand modules |
| Firebase BOM (multiple) | 33.7.0 | ~3-4 MB | Standard cost |
| Compose BOM | 2026.02.01 | ~3-5 MB | Standard cost |
| Google Play Services (Maps + Location) | 20.0.0 / 21.3.0 | ~2-3 MB | Standard cost |
| NokNok FIDO2 + ThreatMetrix | 9.2.0 / 7.7-71 | ~2-3 MB | Required for passkey + fraud detection |
| ExoPlayer | 1.9.2 | ~1-2 MB | Required for media |
| Lottie | 6.7.1 | ~500 KB | Acceptable |
Findings
HIGH
No ABI splits / language splits configured
A single universal APK ships every architecture (arm64, armv7, x86_64) and every language. Users download megabytes they will never use.
Recommendation: Switch release distribution to App Bundle (
./gradlew :Costco:bundleRelease) — Play Store handles language + ABI splits automatically. If APK is required, add splits { abi { enable = true } } in Costco/build.gradle.HIGH
Dual image-loading libraries
Coil 2.7.0 (Compose-native) + Glide 5.0.5 (Views-native) — pick one. Each has its own disk cache and bitmap pool.
Recommendation: Migrate Glide call sites to Coil (Compose) or use Coil + the
coil-compose + coil-svg integrations.HIGH
Dual networking stacks (Volley + Retrofit/OkHttp)
Two HTTP clients double the surface for retries, timeouts, observability, and security. Volley is the legacy stack.
Recommendation: Migrate Volley call sites to Retrofit. Remove Volley + the
VolleyManager Hilt module.HIGH
Dual persistence (Room + DBFlow)
DBFlow 4.2.4 is unmaintained (last release 2018). Room is the Google-backed standard.
Recommendation: Migrate any DBFlow tables to Room. Remove DBFlow + KAPT processor.
MEDIUM
431 PNG drawables (vs 411 XML vectors)
Roughly half the drawables are still bitmap PNGs. Single-color iconography should always be
VectorDrawable.Recommendation: Convert single-color icons to vectors. For multi-color illustrations, use WebP at the appropriate density.
MEDIUM
Dark-mode resources only in 2 modules
values-night/ exists in shared/geofence and feature/productdetaillanding only — the rest of the app has no dark variants.Recommendation: Define dark color tokens in
shared/pallet. Add values-night/colors.xml per design-token build.LOW
Lint baseline absent
No
lint-baseline.xml located. Lint runs likely produce a wall of legacy noise.Recommendation: Generate a baseline (
./gradlew :Costco:lintDebug + commit lint-baseline.xml); review baseline diffs in PR.INFO
Recommended size-tracking workflow
Track release-over-release APK size, fail PRs that exceed a budget by more than X%.
Recommendation: Adopt the
android-apk-size Gradle plugin or diffuse CLI in CI; publish the diff to the PR comments.Costco Android · Code Review Report · Generated 2026-05-07 · 626 machine-curated findings