Vehicle Utility

Offline Vehicle Maintenance & Mileage Ledger

Keeps an encrypted, deterministic service history for all your vehicles on-device. Log fill-ups, audit fuel economy trends, track oil-life, and calculate true depreciation without cloud sync or user accounts.

Download Android APK GitHub Repository

Core Capabilities

Architected for Speed & Absolute Privacy

Runs deterministic operations directly on your physical hardware without remote data broker tracking or subscription lock-ins.

Fuel Economy & Mileage Engine

Log fill-up liters, cost per unit, and odometer readings. Auto-calculates rolling efficiency (km/L & L/100km) and historical price fluctuations.

Oil-Life & Service Health Ring

Visual degradation ring for oil changes, tire rotations, brake pads, and cabin filters with one-tap logging directly from home shortcuts.

100% Offline SQLite Ledger

All records live entirely on your device with zero remote server calls. Full JSON data portability with import/export safeguards.

Engineering Profile

Technical Specifications

Deterministic build targets, native storage engines, and strict privacy boundaries.

Target Platform Android 8.0+ & iOS 15+

UI Architecture React Native 0.76 • Expo SDK 52

Database Engine Local SQLite (expo-sqlite)

Cloud Footprint 0 KB network traffic • 100% Offline

Data Export Deterministic JSON backup

Package Identifier com.djc.carlogs

Design Exploration

4 Design Language Directions

Evaluate the four consistent design languages for Car Logs. Compare icon geometry, splash boot choreography, and in-app tactile UI tokens, then select your preferred direction.

Swiss Typographic Clean

Minimal Precision

Monochrome slate backdrop with ice-cyan accents, delicate borderlines, and razor-sharp typographic data hierarchy.

App Icon Style

Clean hairline car silhouette with an understated circular mileage tick.

Splash / Loading Screen

Car Logs

Crisp white/graphite canvas with centered vehicle contour line and a calm hairline progress indicator.

In-App UI Language

Hairline 1px border cards with zero heavy drop shadows
Generous whitespace and neutral slate surfaces
Plus Jakarta Sans typography with subtle micro-transitions

OBD-II Diagnostic CLI

Terminal Cyber

Retro automotive diagnostic scanner aesthetic: pitch black canvas, phosphor green/cyan readings, and monospace telemetry tables.

App Icon Style

ASCII automotive gauge glyph '[ODB: OK]' with a retro matrix square enclosure.

Splash / Loading Screen

[SYS_BOOT 2026]

> LOAD: car-logs

> AUTH: ZERO_TRACK

> STATUS: OK _

Black ECU terminal boot sequence: '[CANBUS] Link 500kbps', '[DB] SQLite Ready', blinking block cursor.

In-App UI Language

JetBrains Mono monospaced typography throughout
0px border radius, sharp console prompt containers
High-contrast phosphor accents on deep pitch black

High-Contrast Pop Garage

Neobrutalism

Bold 2.5px solid black borders, punchy automotive cyan fills, vintage yellow badges, and hard 4px drop shadows.

App Icon Style

Chunky black-stroked retro coupe with cyan bodywork, white tires, and hard 4px black shadow.

Splash / Loading Screen

Car Logs

Bold warm cream screen with a thick-bordered garage sign badge and bouncy square loading bricks.

In-App UI Language

Heavy 2px black outlines and hard offset drop shadows
Saturated color block badges with bold pill labels
Tactile mechanical depress button transitions

Obsidian Telemetry Bento

Fintech Bento

Deep obsidian backdrop, glowing cyan radial speed dials, frosted glass summary cards, and premium metallic accents.

App Icon Style

Iridescent electric-cyan speed gauge icon set within frosted dark glass with subtle neon rim.

Splash / Loading Screen

Car Logs

Deep midnight obsidian gradient with glowing cyan speedometer sweep and metallic shimmer loader.

In-App UI Language

Bento grid layout with translucent frosted glass tiles
Luminous neon accent glows and sleek status dots
High-tier dark obsidian gradient aesthetic

Support & Regulatory Requests

Need technical assistance, data deletion audit receipts, or have questions about Car Logs? Contact the engineering team:

contact@apps.dhondooo.com