HEALTH | TECHNOLOGY | INNOVATION
Explore interactive Android & Wear OS device showcases, technical architecture highlights, and SHA-256 verified release builds engineered around real-world sensory health, personal safety, and everyday resilience.
SECTION 01 · MOBILE, TABLET & CHROMEBOOK
Full-featured Android applications with interactive multi-device previews, technical stack breakdowns, and signed release feeds.
com.pereralabs.skycover · Sensory Shade, Cloud & Night-Sky Radar
Designed for people managing migraines, photophobia, glare, and sun sensitivity—as well as photographers, campers, and stargazers. Switch between the live promo video and real app screens inside the flat-edge phone frame below, paired side-by-side with the synced Wear OS watch dial.
Instead of running a persistent foreground GPS service that drains battery, Sky Cover schedules a constrained `CoroutineWorker` via `WorkManager` that evaluates 48-hour cloud & UV arrays against the user's custom threshold (30%–95%) and pushes a compact `PutDataMapRequest` payload to any paired Wear OS watch.
// Contiguous Shade Window & Wear OS DataClient Sync
val window = hourlyCloud.drop(nowIdx)
.takeWhile { it.cloudPct >= userThreshold && it.isDaylight }
if (window.size >= 2) {
PutDataMapRequest.create("/skycover/live_shade").apply {
dataMap.putInt("cloud_pct", currentCloudPct)
dataMap.putInt("window_hrs", window.size)
wearDataClient.putDataItem(asPutDataRequest().setUrgent())
}
}Frugal Itinerary & Daily Travel Budget Engine
Built around one simple idea: seeing the world should be possible without spending recklessly. Organizes multi-stop itineraries, tracks daily burn rates across local currencies, and compares transit & lodging side-by-side.
Travelers on tight budgets often keep cellular data off abroad. CheapoTrip caches exchange rates locally and dynamically recalculates your remaining daily allowance whenever you log under or over budget.
fun computeAdjustedDailyCap(trip: TripBudget, dayIndex: Int): Double {
val spentSoFar = trip.entries.filter { it.day < dayIndex }.sumOf { it.amountHome }
val daysLeft = (trip.totalDays - dayIndex).coerceAtLeast(1)
return ((trip.totalCap - spentSoFar) / daysLeft).coerceAtLeast(0.0)
}SECTION 02 · SMARTWATCH & WRIST-FIRST TOOLS
Standalone and wrist-first smartwatch applications engineered for instant one-tap actions, glanceable health & environmental tracking, and seamless Android phone companion integration.
Standalone Wear OS App with Android Phone Companion
A standalone Wear OS smartwatch app paired with a companion app for Android phones, designed to help people reduce smoking gradually at their own pace. Set your daily target and log habits independently on your wrist, then sync with the Android phone companion for long-term reduction curves and encouraging recovery milestones.
Smoke Out persists daily target settings and timestamped habit logs locally on the Wear OS watch first, then broadcasts a `DataMap` delta to the Android phone companion dashboard.
fun logWristEventAndSync(timestampMs: Long) {
watchLedger.insertEvent(timestampMs) // Standalone local persistence
PutDataMapRequest.create("/smokeout/daily_ledger").run {
dataMap.putLongArray("events", watchLedger.todayTimestamps())
dataMap.putInt("daily_target", watchLedger.dailyTarget)
dataClient.putDataItem(asPutDataRequest().setUrgent())
}
}Wear OS One-Tap Safety Trigger & Android Incoming Call Companion
A discreet fake-call safety system engineered to help you exit an uncomfortable or unsafe social situation gracefully. Tap your Wear OS smartwatch once without reaching for your pocket, and your Android phone rings on cue with a realistic incoming call screen.
When the watch button is tapped, `MessageClient` dispatches an urgent `/trigger_fake_call` payload to the phone's background `WearableListenerService`, waking the screen over the lockscreen.
override fun onMessageReceived(event: MessageEvent) {
if (event.path == "/callmenow/trigger_call") {
val delaySec = event.data.decodeToString().toLongOrNull() ?: 5L
callScheduler.scheduleFullScreenIncomingCall(delaySec)
}
}com.pereralabs.skycover · Wrist-First Cloud & UV Radar
Check live overhead cloud cover %, UV index, active shade window countdowns, and 6-hour sky forecasts at a glance on your smartwatch. Syncs automatically with the Sky Cover Android phone app or fetches live weather via on-watch GPS.
The Wear OS watch listens for `/location_sync` DataItems from the phone app so your watch always mirrors the city you're inspecting on your phone, while seamlessly falling back to on-watch GPS when untethered.
override fun onDataChanged(dataEvents: DataEventBuffer) {
dataEvents.forEach { event ->
if (event.dataItem.uri.path == "/location_sync") {
val map = DataMapItem.fromDataItem(event.dataItem).dataMap
fetchWatchWeather(map.getDouble("lat"), map.getDouble("lon"))
}
}
}