SmartCash is a native Android rewards application that lets users earn real money by completing surveys, watching videos, and playing games on popular reward portals — all from within a seamless in-app WebView experience. Earnings accumulate in a real-time wallet and can be withdrawn via PayPal.
Home — featured portals carousel, daily earnings & streak tracker Wallet — live balance, breakdown chart & PayPal withdrawal
- Earn Hub — Browse and launch real reward portals across three categories:
- Surveys — Swagbucks, Survey Junkie, InboxDollars, Toluna, PrizeRebel
- Videos — Swagbucks TV, InboxDollars Videos, MyPoints
- Games — Swagbucks Games, InboxDollars Games, Mistplay
- Full-Screen WebView — JavaScript & DOM storage enabled; back-navigation respects in-page history
- Live Wallet — Animated balance counter, earnings breakdown chart, full transaction history
- PayPal Withdrawals — Sandbox-mode PayPal checkout with a $5.00 minimum threshold
- Home Dashboard — Auto-scrolling featured offers, daily earnings, streak tracker
- Profile — Stats overview, referral code sharing, notification & dark mode toggles
- Apex Ad SDK — Banner, Interstitial, Rewarded Video, and App Open ad formats
- Apex Analytics — Impression events are tracked in real time via our in-house analytics portal (see below)
SmartCash is built following the Model-View-ViewModel (MVVM) pattern layered with Clean Architecture principles, ensuring clear separation of concerns, testability, and scalability.
app/
└── src/main/java/com/smartcash/app/
├── core/
│ ├── design/ # Color, Typography, Theme
│ ├── di/ # Hilt dependency injection modules
│ ├── network/ # Retrofit API interfaces & DTOs
│ └── util/ # ImpressionTracker, helpers
├── data/
│ ├── model/ # Domain models (Portal, Transaction, …)
│ └── repository/ # PortalRepository, WalletRepository
├── feature/
│ ├── home/ # HomeScreen + HomeViewModel
│ ├── earn/ # EarnScreen + EarnViewModel + WebViewScreen
│ ├── wallet/ # WalletScreen + WalletViewModel
│ └── profile/ # ProfileScreen + ProfileViewModel
├── ads/ # BannerAdSlot, InterstitialAdHelper, VideoAdHelper
└── navigation/ # NavGraph, Screen routes
Key patterns:
- Every ViewModel exposes a
sealed UiStateand aStateFlow— no mutable UI state leaks into the View layer - Repositories return
Flow<T>orsuspend fun … : Result<T>— the UI never touches raw data sources - Hilt handles all dependency injection from
@HiltAndroidAppdown to@HiltViewModel applicationScope(tied toApplicationlifecycle) is used for work that must survive screen rotation (e.g.ImpressionTracker)- Navigation is handled by Navigation Compose with animated slide transitions
| Layer | Technology |
|---|---|
| Language | Kotlin 2.0 |
| UI | Jetpack Compose + Material 3 |
| Architecture | MVVM + Clean Architecture |
| DI | Hilt |
| Async | Coroutines + StateFlow / SharedFlow |
| Navigation | Navigation Compose |
| Networking | Retrofit 2 + OkHttp |
| Image loading | Coil |
| Ads | Apex Ad SDK (local AARs) |
| Payments | PayPal Android SDK (sandbox) |
| Min SDK | 21 (Android 5.0) |
| Target SDK | 35 (Android 15) |
SmartCash integrates the Apex Ad SDK for monetisation. Four ad formats are active:
| Format | Placement ID | Trigger |
|---|---|---|
| Banner | smartcash-home-banner |
Home screen, pinned bottom |
| Interstitial | smartcash-earn-interstitial |
After each portal session |
| Rewarded Video | smartcash-video-rewarded |
Opt-in from Earn screen |
| App Open | smartcash-appopen |
App foregrounded |
Initialisation follows the standard Apex SDK pattern in SmartCashApplication:
val config = ApexAdsConfig.Builder(APP_TOKEN)
.debugLogging(true)
.testMode(true)
.build()
ApexAds.init(this, config)
ServiceLocator.register(AdNetworkClient::class.java, MockAdExchange())
WalletAdExtension.install()
AppOpenAd.initialize(this, PLACEMENT_APP_OPEN, listener)Every ad impression is dispatched to Apex Analytics — our in-house real-time analytics portal — via ImpressionTracker, a Hilt @Singleton that:
- Accepts impression events from any ad listener callback
- Enqueues them in a
Channel<ImpressionPayload>(non-blocking) - Drains the channel in
applicationScope, POSTing tohttp://10.0.2.2:3001/api/impressions - Retries up to 3 times with exponential backoff on network failure
impressionTracker.track(
creativeId = "creative-banner-001",
placementId = "smartcash-home-banner",
adFormat = "BANNER",
)Withdrawals use the PayPal Android SDK in sandbox mode. The wallet enforces a $5.00 minimum before the checkout flow is launched. On success the local balance is updated and a confetti animation is shown.
SmartCash ships alongside Apex Analytics — a purpose-built, in-house ad impression dashboard developed to give full visibility into SDK performance without relying on third-party analytics platforms.
⚠️ Apex Analytics is currently in beta. Features and APIs are subject to change.
The portal is a companion project (/SmartCashAnalytics) running as a Docker container on the host machine. It receives impression events from the emulator via the loopback address and renders them in real time:
- KPI cards (Total, Banner, Interstitial, Video, App Open)
- 24-hour impressions area chart broken down by format
- Creative performance table (sortable)
- Live feed of the last 20 impressions
Quick start:
cd SmartCashAnalytics
docker-compose up --build
# Dashboard → http://localhost:3001- Android Studio Hedgehog or newer
- JDK 17
- Android SDK 35
git clone https://github.com/Madroid2/smartcash-app-android.git
cd smartcash-app-android
# Open in Android Studio and sync GradleThe project references Apex Ad SDK AARs from app/libs/. These are included in the repository.
Copyright © 2026 Madhur Lalit (@Madroid2). All rights reserved. See LICENSE for details.