Tools Hub

Tools Hub puts 167 everyday utilities in one app — and almost all of them work with no internet at all.

Instead of installing a dozen single-purpose apps, get converters, calculators, timers, text and developer helpers, a QR scanner, image and video tools, and device sensors behind one clean Material You interface. Star the tools you use, and the ones you opened last are always a tap away.

WHY TOOLS HUB

• Works offline — calculations, conversions, and file processing all happen on your device

• No account, no sign-in, no ads

• Nothing is uploaded: your text, photos, videos, and passwords stay on the phone

• Material You theming with light, dark, and system modes, plus colour presets

• Favourites, recents, and instant search across every tool

WHAT'S INSIDE

Converters (22)

Length, weight, temperature, volume, area, speed, data storage, energy, pressure, power, time, angle, frequency, data rate, force, torque, density, typography, flow rate, fuel economy, cooking measures, and Roman numerals.

Calculators (27)

Discount, tip and split, EMI and loan, mortgage, compound interest, sales tax and VAT, percentage, BMI, GPA, calorie needs, statistics, fractions, geometry, running pace, electricity cost, work hours, unit price, recipe scaler, and more.

Time & Productivity (15)

Stopwatch, countdown, Pomodoro, interval timer, alarm clock, world clock, time-zone converter, habit tracker, calendar planner, event countdowns, business-day and duration maths.

Text Tools (19)

Case converter, find and replace, text cleaner, word counter, slugify, number to words, Morse code, NATO speller, binary, character inspector, frequency counter, text to speech, and on-device speech to text.

Developer (32)

JSON formatter, CSV to JSON, JSON to YAML, regex tester, diff, Base64, Base32, URL and HTML encoders, hashes and HMAC, JWT decoder, UUID generator, Unix timestamps, bitwise calculator, cron explainer, number bases, colour formats, contrast checker, gradients, palettes, and offline cheat sheets.

Security (10)

Password generator, passphrases, PIN generator, password manager, encrypted notes, text encryption, TOTP authenticator codes, secure random values, card validator, and password entropy — all stored locally on your device.

QR & Barcode (5)

Scan QR codes and barcodes with the camera, generate QR codes from text or links, and build ready-to-scan Wi-Fi and contact codes.

Media Tools (13)

Compress, resize, convert, and edit images, annotate and add captions, merge or split PDFs, trim and convert video, change playback speed, and extract or trim audio — processed on device.

Device Tools (18)

Device info, battery, compass, spirit level, flashlight and strobe, sound meter, metronome, protractor, screen ruler, dead-pixel screen test, magnetic field meter, step estimator, and network diagnostics with ping, port check, and LAN sweep.

Random & Fun (6)

Dice, coin flip, random numbers and colours, list picker, and team splitter.

PERMISSIONS, AND WHY

• Camera — QR and barcode scanning, and taking photos for the image tools

• Microphone — sound meter, audio recording, speech to text

• Location — Android requires it before an app can read the name of your Wi-Fi network; used only by Network Info

• Notifications and alarms — alarms, timers, and countdowns firing in the background

• Photos and files — only the files you pick, and the exports you save

Prefer not to grant any of them? Settings has a switch that limits or hides every permission-dependent tool, and the rest of the app keeps working.

Tools Hub is free, ad-free, and built to stay useful on a plane, on a trek, or anywhere the signal drops.