tech-fulwariya · Independent Android Software Studio

Fulwariya Technologies (tech-fulwariya)

Engineered for precision. Built for privacy. Fulwariya Technologies crafts high-grade native Android applications for geospatial field research, wireless local network transfers, offline vector notes, and document cryptography.

Explore Our Apps Privacy & Compliance
All applications feature 100% Google Play compliance, transparent data handling, and dedicated user rights.
01Offline Field Data & GIS
02Secure FTP & SFTP Protocols
03100% Offline Digital Notes
04Android 16 & SDK 36 Ready
Application Portfolio

Native Android Apps Ready for You

Designed from the ground up for stability, zero unnecessary cloud dependencies, and fluid user experience.

App Finder & Workflows

Find the Perfect Tool for Your Needs

Whether you are mapping land boundaries in remote terrain, transferring large files securely, or studying with interactive digital stationery, Fulwariya Technologies provides dedicated offline-first solutions.

Offline Field Data Collection & GIS

SurveyOg Pro · Research & Spatial Suite

Enterprise offline field data collection suite. Conduct qualitative interviews with audio notes, quantitative statistical surveys, and precision GIS land mapping with GNSS telemetry — 100% offline.

Explore SurveyOg Pro

Secure SFTP & Offline Wi-Fi Sync

FTP Client File Transfer

Connect to remote Linux VPS/NAS servers using SSH keys (Ed25519/RSA), manage files with dual-pane drag-and-drop, or share files phone-to-PC over Wi-Fi without cables or internet data.

Explore FTP Client

Stylus Notes & PDF Study Suite

Notes ABC

Seeking a premium offline digital notebook on Android with 120 FPS vector ink, PDF markup, active recall study tape, built-in math solver, and encrypted local storage?

Explore Notes ABC

Smart PDF Hub & 22+ Pro Tools

PDF Pro · Document Suite

Need to compress heavy PDFs by up to 75%, manage pages visually (reorder, rotate, delete), protect contracts with AES-256 encryption, or view Office docs offline?

Explore PDF Pro
Native Architecture & Capabilities Matrix

Engineered for Privacy, Speed & 100% Offline Autonomy

Tired of mandatory cloud subscriptions, slow speeds, intrusive ads, and privacy-invasive telemetry? Explore how Fulwariya's offline-first Android apps offer modern, high-speed, zero-cloud software architectures.

Network & File Sharing

FTP Client & WiFi FTP Server

v1.4.3 (Build 23) · Target SDK 36
Core Protocol Architecture:
Dual-Pane Remote SFTP · High-Speed Local Wi-Fi Bridge · SSH Ed25519
Key Architectural Advantages:
  • Dual Architecture: Both a remote FTP/SFTP client and a high-speed local Wi-Fi transfer server (Phone ⇄ PC) in one unified app.
  • 10,000+ Batch Transfer Engine: Queues and transfers massive directory trees without UI lag or crashes.
  • Stream as Archive (.tar.gz): Download whole remote folders on-the-fly without individual file roundtrip overhead.
  • Zero Cloud, Zero Ads: No third-party accounts, no subscriptions, hardware-backed Keystore biometric lock.
Explore SFTP Architecture Install Free
Field Surveys & GIS

SurveyOg Pro

Field Data Collection & Mobile GIS
Core Geospatial Engine:
Geodesic WGS84 Survey Engine · Multi-GNSS Satellite Telemetry · OGC KML/GeoJSON
Key Architectural Advantages:
  • 100% Offline Autonomy: No mandatory cloud server or per-seat monthly subscription required.
  • Geodesic WGS84 Land Measurement: Sub-meter legal parcel area by walking boundary perimeters (Acres, Hectares, Bigha).
  • Multi-Constellation GNSS Telemetry: Live C/N0 tracking of GPS, GLONASS, Galileo, and BeiDou satellite constellations.
  • Open Geospatial Export: Direct one-tap export to standard OGC KML/KMZ and RFC 7946 GeoJSON.
Explore Survey Architecture Get on Google Play
Stylus Notes & Study

Notes ABC

Vector Notebook & Active Recall
Core Vector & Study Engine:
120 FPS Parametric Vector Ink · Active Recall Tape · SM-2 Spaced Repetition · CAS Math
Key Architectural Advantages:
  • Native C++ 120 FPS Vector Ink: Ultra-responsive parametric Bézier curves with zero stroke lag and infinite resolution zoom.
  • Active Recall Tape & SM-2: Occlude answers on notes or PDFs, tap to test recall, and schedule review with SuperMemo SM-2.
  • On-Device CAS Math Engine: Evaluates algebra, derivatives, and integrals symbolically right on your tablet without cloud APIs.
  • 100% Offline SQLCipher: Complete hardware-backed encryption with zero cloud sync leaks or account lock-in.
Explore Vector Ink Suite Get on Google Play
Documents & Security

PDF Pro

100% Offline Smart PDF Hub
Core Document Engine:
100% Offline Multi-Pass Optimizer · Visual Page Studio · ISO 32000-1 AES-256 Vault
Key Architectural Advantages:
  • 100% Local Processing: No uploading confidential contracts or tax returns to third-party web servers.
  • Smart Multi-Pass Compression (Up to 75%): Resamples raster images via bicubic downsampling while keeping vector text razor-sharp.
  • Visual Page Studio: Drag-and-drop page reordering, 90° rotation, page deletion, extraction, and insertion.
  • Bank-Grade AES-256 Vault: ISO 32000-1 password encryption with granular print and copy permissions.
Explore Offline PDF Studio Join Beta Testing
Knowledge Base & Technology Guides

Understanding the Technology Behind Our Applications

Everything you need to know about network file protocols, satellite GIS telemetry, and vector digital stationery — and how our native Android tools solve real-world problems.

NETWORK UTILITIES

What is FTP & SFTP? (And How to Transfer Files Cable-Free)

#FTP #SFTP #FTPS #WiFiTransfer #SSHKey #Ed25519 #SysadminTools

1. FTP vs. SFTP: What is the Difference?

FTP (File Transfer Protocol) is an Internet protocol created in RFC 959 for transmitting files over TCP. In plain FTP, usernames and passwords travel unencrypted. SFTP (SSH File Transfer Protocol) runs on Secure Shell (port 22), wrapping all data and authentication in military-grade cryptography with support for Ed25519 and RSA private keys.

2. Local Wi-Fi File Sync (Without Cloud Uploads)

Uploading gigabytes of photos or videos to cloud drives is slow and compromises data privacy. By launching a local FTP server directly on your Android phone, you can connect from Windows File Explorer or Mac Finder via ftp://192.168.x.x:2121 and copy files at maximum Wi-Fi bandwidth without internet usage.

Recommended Android Solution: FTP Client File Transfer by Fulwariya Technologies (Dual-Pane Drag & Drop, SSH Key Auth, Offline Wi-Fi Server)
GEOSPATIAL & GIS

What is Mobile GIS & Geodesic Land Area Measurement?

#GIS #LandSurveying #CivilEngineering #GNSS #GPSArea #KML #GeoJSON #WGS84

1. Geodesic Calculations vs. Flat Planar Approximation

Basic Cartesian area calculators treat the surface of the Earth as flat, introducing substantial calculation errors over larger agricultural plots or civil projects. Geodesic calculation calculates land acreage, hectares, and perimeters along the true WGS84 curvature of the Earth, guaranteeing sub-meter precision.

2. Multi-GNSS Satellite Telemetry & Open Spatial Exports

Smartphones receive multi-frequency signals from GPS, GLONASS, Galileo, and BeiDou. Advanced mobile GIS software reads live Carrier-to-Noise ($C/N_0$) telemetry to ensure high-accuracy fixes before exporting spatial layers to standard 3D Earth viewers (KML) or professional desktop GIS software (GeoJSON).

Recommended Android Solution: SurveyOg Pro by Fulwariya Technologies (100% Offline Field Data Collection, Research & GIS)
ACADEMIC & PRODUCTIVITY

What is Vector Ink, Active Recall & Spaced Repetition in Note-Taking?

#NotesABC #VectorInk #ActiveRecall #SpacedRepetition #SM2 #CASMath #SQLCipher #StylusNotebook

1. Vector Ink vs. Raster Drawing

Standard drawing apps store handwriting as pixel bitmaps that become jagged and blurry when zoomed. Vector ink converts stylus strokes into cubic Bézier splines rendered at 120 FPS, ensuring infinite resolution, sub-pixel pressure responsiveness, and compact vector PDF exports.

2. Active Recall Tape & SM-2 Algorithm

Passive note reading leads to rapid forgetting. Active Recall Tape lets students cover key terms and tap to self-test, while an automated SuperMemo SM-2 algorithm spaces review sessions at scientifically proven memory intervals to maximize exam performance.

Recommended Android Solution: Notes ABC by Fulwariya Technologies (120 FPS Vector Ink, Study Tape, Math CAS, 100% Offline)
DOCUMENT UTILITIES & SECURITY

How Smart PDF Compression & Bank-Grade AES-256 Security Work Offline

#PDFPro #SmartPDFCompression #VisualPDFManager #AES256PDF #WatermarkPDF #UniversalDocumentSuite #TargetSDK36 #ComPdfpro1

1. Smart Multi-Pass Compression (Up to 75% Reduction)

Traditional PDF shrinkers degrade vector fonts or upload confidential contracts to third-party cloud servers. Smart Compression isolates embedded typography and vector shapes losslessly while applying bicubic downsampling to oversized raster images, reducing file sizes by up to 75% completely on-device.

2. Visual Page Studio & AES-256 Encryption Vault

Organize multi-page documents by dragging and dropping visual page thumbnails, rotating sideways scans 90°, or deleting blank sheets. Protect sensitive files with ISO 32000-1 standard AES-256 password encryption and granular print/copy permissions.

Recommended Android Solution: PDF Pro by Fulwariya Technologies (100% Offline Smart PDF Hub, 22+ Pro Tools, AES-256 Vault)
Search Engine & AI Discovery Index

Find Queries, Technical Answers & Solutions

Explore common engineering questions, network protocol guides, geospatial survey formulas, and privacy-first mobile solutions across our software ecosystem.

NETWORK & SYSADMIN #FTPClient #SFTP #WiFiTransfer

How can I transfer files between Android and PC over Wi-Fi without cables or cloud storage?

Use FTP Client File Transfer. Start the built-in "Local Wi-Fi File Sharing" server, choose your scope (Entire Storage, Folder, or Custom Files), and scan the on-screen QR code or enter the local URL (e.g. http://192.168.1.15:8080) in your desktop browser to stream videos, download files, or upload at full Gigabit Wi-Fi speed with zero internet data consumed.

com.ftpclient.app View FTP Client
REMOTE HOSTING #SSHKey #Ed25519 #LinuxVPS

How to connect to a Linux VPS (Ubuntu/EC2) from Android using an Ed25519 SSH key?

In FTP Client File Transfer, select SFTP (SSH-2 port 22), enter your server host IP, and choose "Private Key" authentication. Select your OpenSSH or PEM format Ed25519 or RSA 4096 private key from device storage. Manage server files with dual-pane drag-and-drop, edit configuration files, and inspect Unix CHMOD permissions directly.

Target SDK 36 Ready Get on Play Store
GEOSPATIAL & GIS #SurveyOgPro #GeodesicArea #WGS84

How to calculate farm acreage or plot boundary by walking around it with a phone?

Open SurveyOg Pro, start a Polygon Survey, and enable "Live Boundary Walk". The app monitors multi-constellation GNSS satellite signals (GPS, GLONASS, Galileo, BeiDou) and records boundary vertices as you walk. It computes true geodesic surface area on the WGS84 ellipsoid in Acres, Hectares, Sq. Meters, and Bigha with sub-meter legal accuracy.

com.surveyog.pro View SurveyOg Pro
FIELD RESEARCH & M&E #SkipLogic #OfflineForms #KML #GeoJSON

How to create offline research questionnaires with skip logic and photo evidence?

In SurveyOg Pro, researchers build custom offline questionnaires featuring 14+ question types (text, numbers, dropdowns, geotagged photos, audio interviews, signatures) with conditional skip-logic branching. Export completed datasets directly to standard OGC KML/KMZ bundles and RFC 7946 GeoJSON for instant desktop GIS mapping.

100% Offline Autonomy Get on Play Store
DIGITAL INK & STUDY #NotesABC #ActiveRecall #SM2 #SPen

What is Active Recall Tape and how does spaced repetition work in digital note-taking?

Notes ABC features an interactive Active Recall Tape tool. Draw colored tape over formula derivations, anatomical structures, or foreign vocabulary on notes and PDF slides. In study mode, tap tape strips to reveal answers, and convert occluded sections into digital flashcards scheduled with the scientific SuperMemo SM-2 algorithm.

org.notesabc View Notes ABC
DOCUMENT CRYPTOGRAPHY #PDFPro #SmartCompression #AES256

How can I compress PDFs by up to 75% on Android without uploading to external cloud servers?

PDF Pro uses an on-device multi-pass optimization engine. It isolates embedded vector typography losslessly while resampling camera-captured raster images using bicubic interpolation and lossless Flate/ZIP stream compression. Reduce file sizes by up to 75%, visually rearrange pages, and encrypt files with bank-grade AES-256 passwords with 100% offline privacy.

com.pdfpro1 View PDF Pro
ENTERPRISE FILE TRANSFER #DualPaneSFTP #WiFiBridge #StreamArchive

How can I securely transfer large files between Android, PC, and servers without cloud uploads?

FTP Client & WiFi FTP Server (v1.4.3) provides a high-performance dual-engine solution. It combines an enterprise remote client (SFTP with Ed25519/RSA keys, 10,000+ batch engine, 1-tap .tar.gz streaming) and a high-speed local Wi-Fi sharing server for direct PC browser transfers with zero cloud exposure and zero ads.

Dual Client + Server View SFTP Client
AUTONOMOUS FIELD GIS #OfflineSurvey #GeodesicWGS84 #GNSSSatellite

How does autonomous field data collection work 100% offline without central servers?

SurveyOg Pro is engineered for completely autonomous on-device research and boundary mapping. It eliminates the need for central cloud servers, providing 14+ question types, conditional skip logic, photo evidence, multi-GNSS satellite signal monitoring, and calculates true geodesic WGS84 land plot area by walking, exporting directly to CSV, KML, and GeoJSON.

100% Offline Autonomy View Survey Engine
DIGITAL INK & STUDY #120FPSVectorInk #ActiveRecall #SM2Flashcards

How does 120 FPS vector ink and the Active Recall study system work on Android tablets?

Notes ABC (org.notesabc) delivers desktop-class stylus performance natively on Android. It features a native C++ 120 FPS vector ink engine with sub-pixel pressure and tilt sensitivity, interactive Active Recall Tape for covering and revealing answers, automated flashcard generation with the SuperMemo SM-2 spaced repetition algorithm, and an embedded on-device CAS math solver for symbolic algebra and calculus.

org.notesabc · S-Pen Ready View Study Suite
OFFLINE DOCUMENT SECURITY #OfflinePDFTools #SmartCompression #AES256Security

How can I compress, organize, and encrypt PDF documents on Android with 100% privacy?

PDF Pro (com.pdfpro1) performs all 22+ document operations locally on-device without uploading sensitive files to cloud servers. It features smart multi-pass compression saving up to 75% file size without degrading text sharpness, a Visual Page Studio to reorder, rotate 90°, delete, and extract pages, bank-grade ISO 32000-1 AES-256 encryption, live watermarking, and offline voice read-aloud TTS.

com.pdfpro1 · 100% Offline View PDF Studio
DIGITAL INK & GRAPHICS #VectorInk #CubicBezier #120FPS

What is vector ink and why is it superior for digital note-taking?

Unlike raster ink (which stores handwriting as pixel bitmaps that become blurry when magnified), vector ink decomposes handwritten strokes into mathematical parametric Bézier curves. This enables infinite resolution zooming, ultra-low 120 FPS latency with zero stroke lag, and lossless vector PDF export. Notes ABC features a native C++ vector engine optimized for hardware digital pens and active styluses.

120 FPS Vector Engine Explore Notes ABC
DOCUMENT STUDIO #VisualPageStudio #PDFReorder #Rotate90

How to visually reorder, rotate 90 degrees, delete, or add pages to a PDF on Android?

In PDF Pro, the Visual Page Studio displays high-resolution thumbnails of every page. You can drag and drop pages to rearrange their sequence, tap the 90° rotate tool to fix upside-down scans, delete blank sheets, or merge pages from other documents, and save the result instantaneously without re-encoding the entire document payload.

Visual Page Studio Explore PDF Pro

Master Studio AI & Search Engine Index

Target SDK 36 · Android 16 Ready · Zero Telemetry
SurveyOg Pro com.surveyog.pro Autonomous Field GIS Engine Offline Skip-Logic Forms Offline Field Data Collection Geodesic Land Area WGS84 Calculate Acreage GPS Walking GNSS Satellite Telemetry KML KMZ GeoJSON Export FTP Client & WiFi FTP Server com.ftpclient.app Dual-Pane SFTP Client Android High-Speed Local Wi-Fi Bridge Local HTTP File Server Cable-Free Wireless Sync Phone to PC Transfer No Cable Ed25519 SSH Key SFTP Dual Pane File Browser Stream Archive .tar.gz 10,000+ Batch Transfer Queue Notes ABC org.notesabc 120 FPS Vector Ink Engine Sub-Pixel Stylus Handwriting Active Recall Tape Study Tool SuperMemo SM-2 Spaced Repetition On-Device CAS Math Solver Tiled Vector PDF Annotator PDF Pro com.pdfpro1 100% Offline PDF Engine On-Device PDF Compression Zero Cloud Server Uploads Smart PDF Compression (75%) Visual Page Studio (Reorder Rotate Delete) AES-256 ISO 32000-1 Vault Offline Text-to-Speech Read Aloud
Google Play Compliant

Transparent Data Safety & Full Control

Every application published by Fulwariya Technologies provides strict data disclosures, zero unwanted tracking, and an instant Account & Data Deletion portal.

Review Legal & Privacy Request Data Deletion