Vehicle Document Wallet Android App with PUC, Insurance and Service Renewal Reminders

Vehicle Document Wallet is an Android app that keeps every vehicle document — registration certificate, insurance policy, PUC certificate, driving licence and FASTag details — in one offline vault on the owner's phone, with expiry tracking and renewal reminders for insurance, PUC and service. The problem it answers is ordinary: vehicle papers live in gloveboxes, wallets and chat apps, so expiries surface only after lapsing. An expired PUC or insurance means a fine at a traffic check, a rejected claim after an accident, and a vehicle running beyond its emission limits. Remembering half a dozen dates across vehicles is the kind of chore memory drops, and the usual fix — a calendar entry set months ago — dies with the old phone. This wallet turns every document into a dated record with a photographed copy, computes days-left continuously, and fires local reminders at 30, 15, 7 and 1 day before expiry, plus service-due alerts from odometer and date intervals.

Vehicle Document Wallet works as a fully offline Android app: the owner creates one profile per vehicle, adds each document with its number, issuer, issue date and expiry date plus a photo of the certificate, and the app's expiry engine computes days-remaining for every dated record from the device clock. For each document with an expiry, the engine schedules four local notifications — 30, 15, 7 and 1 day before the date — through WorkManager, so reminders fire even with mobile data switched off. A service log records each workshop visit with date, odometer reading and cost; the next service due is derived from whichever comes first, the configured kilometre interval or the month interval. The home dashboard ranks vehicles by urgency, each document detail shows its certificate preview, and a share action renders a one-page PDF dossier of the vehicle's documents for traffic checks. All data lives in an on-device Room database with encrypted backup and restore.

1. The owner creates a vehicle profile: registration number, make and model, fuel type and current odometer reading — one row per vehicle in the Room database.
2. Each document is added with its type (PUC, insurance, RC, driving licence, FASTag), document number, issuer, issue and expiry dates, and a photo of the certificate taken with CameraX or picked from the gallery.
3. The expiry engine converts every expiry date to epoch milliseconds at save time — a builder decision from the demo build, so a phone crossing a timezone can never push a reminder across midnight.
4. For each dated document, WorkManager enqueues one-shot workers for the 30, 15, 7 and 1-day thresholds; only thresholds still in the future are scheduled, the rest are logged as already notified.
5. Service visits are logged with date, odometer, cost, garage and work done; the next service due is computed as the earlier of (last service + kilometre interval) and (last service + month interval).
6. The dashboard renders every vehicle with its worst-status chip; opening a vehicle shows the documents tab with live days-left chips, the service tab with history and next-due card, and the reminders tab with that vehicle's full schedule.
7. Tapping a document opens its certificate preview and its scheduled reminders; the share action compiles the vehicle's documents into a one-page PDF dossier sent through the Android sharesheet.

Tech stack:

• Kotlin (app language)
• Android SDK · design target minSdk 26 (Android 8.0)
• Room · on-device SQLite database
• WorkManager · local reminder scheduling
• CameraX · certificate photo capture
• PdfDocument API · one-page dossier generation
• Jetpack Security · EncryptedFile backup
• Material 3 components · app UI

Vehicle Document Wallet centres on four capabilities that together replace the glovebox folder. First, the document vault: every vehicle gets dated records for RC, insurance, PUC, driving licence and FASTag, each carrying the certificate's number and issuer plus a photographed copy, so the originals can stay safely at home. Second, the expiry engine: days-remaining is computed continuously from the device clock and rendered as colour-coded chips — red for expired or under a week, amber under a month — so urgency reads at a glance. Third, local renewal reminders: WorkManager schedules 30/15/7/1-day notifications per document plus service-due alerts, all firing offline with no server and no account. Fourth, the service log and PDF dossier: workshop visits accumulate with odometer and cost history, and one tap compiles the vehicle's documents into a shareable one-page PDF for traffic checks.

• [Multi-vehicle document vault] One profile per vehicle holds RC, insurance, PUC, driving licence and FASTag records with numbers, issuers, dates and certificate photos. Lifetime documents like the RC are marked "no expiry" instead of forcing a fake date.
• [Expiry engine with days-left chips] Every dated document gets a live countdown computed from the device clock, colour-coded by urgency. In the demo build, the engine's scan over 5 dated documents × 4 reminder thresholds completed in under 5 ms (measured).
• [Local renewal reminders] WorkManager schedules 30/15/7/1-day notifications per expiring document, plus service reminders 15 and 3 days before the next due date. All fire offline — a reminder that needs a server dies the day your data pack does.
• [Service log with due-date maths] Workshop visits record date, odometer, cost and work done; the next service is derived from whichever comes first of the kilometre interval or the month interval (design default 10,000 km / 6 months, configurable per vehicle).
• [Certificate preview] Each document opens a certificate-style preview of its fields. PUC previews show the measured emission values against their limits — sample data in the demo: CO 0.28 % against a 0.5 % limit, HC 148 ppm against 750 ppm.
• [One-tap PDF dossier] Compiles a vehicle's documents into a single-page PDF for traffic checks, shared through the Android sharesheet to any installed app.
• [Photo capture of certificates] CameraX capture or gallery import attaches a photographed copy to each document, stored in app-private storage so other apps cannot read it.
• [Encrypted backup and restore] The Room database exports to an encrypted backup file, so the whole wallet survives a phone change or a reinstall.

• Complete Android source code in Kotlin
• Room database schema with migration notes
• WorkManager reminder-scheduling module
• Document capture, certificate preview and dossier screens
• Service log with next-due computation
• Encrypted backup and restore utility
• Project report PDF (architecture, expiry-engine design, methodology)
• PPT presentation for the final review
• Viva Q&A preparation document (Room, WorkManager, scoped storage, notification channels)