EssentialTools -All in One Kit

One app instead of a hundred. EssentialTools collects the small tools you actually reach for — calculators, converters, text utilities, image and PDF handling, timers and device checks — into a single, searchable place.

Everything runs on your phone. There are no accounts, no ads, no tracking, and no runtime permissions to grant.

WHAT IS INSIDE

Calculator & maths

Scientific calculator, percentages, averages and statistics, fractions, ratios, BMI, age, date arithmetic, aspect ratio, DPI and PPI.

Money

Loan and EMI, mortgage with tax and insurance, interest and savings, salary converter, margin and markup, investment return, savings goals, inflation, tax and VAT, discounts, tips and bill splitting, currency conversion.

Converters

Length, weight, temperature, area, volume, speed, data, time, pressure, energy, power, frequency, angle and fuel economy — plus number bases, Roman numerals, numbers to words and time zones.

Text & code

Word and character counter, case converter, sort and de-duplicate, find and replace, Base64 and URL encoding, hashes, JSON formatter, regex tester, Morse code, slugs, JWT decoder, URL parser, and HTML, CSS and JavaScript formatting.

Generators

QR codes, Wi-Fi QR codes, barcodes, passwords, PINs, usernames, random strings and numbers, UUIDs, colour tools, CSS gradients and shadows, Lorem Ipsum.

Images & PDF

Compress, resize, crop and convert images, read EXIF data, pick colours from a photo, build a PDF from pictures, export a PDF page as an image, rotate, split, merge and create PDFs.

Time & work

Stopwatch, countdown timer, Pomodoro, event countdown, sleep calculator, flight duration, Unix timestamps, work hours, overtime, meeting planner, habit counter, decision maker.

Everyday

Unit price comparison, cooking converter, recipe scaler, electricity cost, water intake, trip budget, parking cost, distance between coordinates, mobile data planner, storage planner, battery life.

Device

Device info, battery info, sensor list, screen test, screen info, vibration test, internet speed test, flashlight, compass, bubble level, on-screen ruler, notes and a checklist.

HOW IT RESPECTS YOU

No runtime permissions. The app declares only Vibrate, Internet and Network State — all normal permissions that never show a prompt. The flashlight works without camera access. Image tools use Android's own photo picker, so the app only ever sees the one picture you choose.

Offline first. Only the currency converter and the speed test use the network, and both say so on screen. Currency rates are cached so the converter keeps working without a connection.

Nothing collected. No analytics, no advertising identifiers, no account. Notes, checklists and counters stay in the app's private storage on your device.

Small and quick. Around 2 MB to download, and it opens in well under a second.

Save the tools you use most and reach them straight from a long-press on the app icon.