Everyday tools.
No strings.

Kin is a curated collection of simple, free web tools that just work. No subscriptions, no accounts, no tracking. Install them to your phone, use them offline, no app store needed.

Free to use, forever

No account needed

No tracking or ads

Works on any device

Community built

Install to your phone, no app store

Catalog

28 tools

Tune your ukulele using your phone's microphone. Standard and alternate tunings. Shows you which way to turn the peg. That's it.

Replaces GuitarTuna, Fender Tune

Set a tempo, hear the click. Tap to find the BPM. Subdivisions if you need them. Works offline.

Replaces Pro Metronome, Soundbrenner

Tap along to anything playing and get the tempo. Useful for DJs, musicians, dancers, runners — anyone who needs to know how fast something is.

Replaces BPM Tap apps with ads

Find a colour, copy the code, build a palette. Paste a hex or RGB value if you have one, or just pick visually. Everything stays in your browser.

Replaces Coolors Pro, Color Hunt

Utility KIN-005

Turn any link, text, wifi password, or contact into a QR code. Download as an image. Everything happens in your browser, nothing sent anywhere.

Replaces QR Tiger, Beaconstac

Education KIN-006

Classroom Timer

Big, full-screen countdown for classrooms. Colour shifts from green to amber to red as time runs out. Pick a preset or set your own. Chime at the end.

Replaces Google Timer, random online timers

Wellbeing KIN-007

Rain, wind, waves, fire, white noise and pink noise — layer and mix them however you like. Sleep timer included. Save presets or share a mix with someone.

Replaces Noisli, A-Soft Murmur

Learning KIN-008

Make your own flashcard decks, flip through them, mark what you know. Saved in your browser. Your data stays on your device.

Replaces Quizlet Plus, AnkiApp

See it in action

Jet Lag Planner

Enter where you're flying from and to, get a plan to reset your body clock. When to seek light, when to sleep, when to expect the worst. Works offline.

Replaces Timeshifter, Jet Lag Rooster

Audio Calculators

18 calculators for anyone making or mixing music. Delay times, frequencies, sample rates, latency, room modes, file sizes and more — all in one place, no clutter.

Replaces scattered online audio calculators

Shopping KIN-011

Unit Price Calculator

Work out which size is actually cheaper. Compare any two packs — 6x330ml vs 2L, 500g vs 1kg — and see the real cost per unit. No maths required.

Replaces mental maths in the supermarket aisle

Utility KIN-012

Random Name Picker

Paste a list of names, pick one at random. Keeps a history so nobody gets picked twice. Good for classrooms, team standups, raffles — anything that needs to be fair.

Replaces Wheel of Names, random.org

Wellbeing KIN-013

Slide a scale to log how you're really feeling. Add a note if you want. See your last seven days, colour-coded by mood. Private, offline, no account.

Replaces mood tracking apps that want your data

Wellbeing KIN-014

Breathing Exercise

Guided breathing exercises — box breathing, 4-7-8, ADHD reset, wind-down for sleep. Visual guide, audio cues, optional voice prompts. Fully offline, no account.

Replaces Calm, Headspace, breathing apps with accounts

by Alice and Darren

Track your cycle, predict your next period, log symptoms and notes. PIN lock and panic delete if you need them. Everything stays on your device.

Replaces Clue, Flo, period trackers that sell your health data

Utility KIN-016

Paste a list of ingredients, change the number of servings, get the adjusted amounts. Handles fractions and unit conversions. Nothing sent anywhere.

Replaces recipe scaling apps that require sign-up

Wellbeing KIN-017

Stuck between options? Paste them in, hit Decide. One gets picked. Nothing saved, nothing sent.

Replaces overthinking

Wellbeing KIN-018

by Alice and Darren

Baby tracker for exhausted parents. Log feeds, sleep and nappies in under two seconds. Wake windows, nap predictions, and a daily note that says you're doing fine. Nothing leaves your device.

Replaces baby tracking apps that want your data

Utility KIN-019

Markdown Download

Write or paste text and download it as a Markdown file. Word count, character count, copy to clipboard. No editor needed, no account, nothing saved.

Replaces opening a code editor just to save a quick .md file

Utility KIN-020

Password Generator

Generate strong passwords or easy-to-remember passphrases in your browser. Adjust length, characters, and complexity. Strength meter included. Nothing stored, nothing sent.

Replaces ad-heavy password generator websites

Utility KIN-021

Paste any text and see word count, character count, reading time, and how readable it is. Highlights if you're over platform limits. Select a passage to count just that part. Nothing stored.

Replaces wordcounter.net and similar ad-heavy sites

Utility KIN-022

Split shared costs without signing up for anything. Log what was spent, split it equally or however you like, and see who owes who. Tip calculator included. Data stays on your device.

Replaces Splitwise, Tricount

Developer KIN-023

Paste JSON, get it formatted, validated and colour-highlighted. Browse the structure as a tree, compare two payloads, or query values by path. Nothing leaves your browser.

Replaces jsonlint.com, jsonformatter.org

Wellbeing KIN-024

Write down a thought that won't leave you alone. Answer three questions. Get a verdict: Act on it, Schedule it, Let it go, or recognise it's Not Yours. History shows what you keep coming back to.

Replaces CBT worksheets, anxiety journaling apps

Wellbeing KIN-025

Pick a routine — morning, desk break, post-run, bedtime, or chair-based. Set your hold time. Audio cues move you through it, and every stretch has an easier version.

Replaces YouTube stretch videos, app-gated routine planners

Utility KIN-026

Track your monthly costs, subscriptions, and savings buffer. Know your true baseline, spot what's draining you, and see your money clearly — no account, no bank connection.

Replaces budgeting apps that require an account, spreadsheet sprawl

See it in action →

Track sets, reps, and weight across any exercise type. Built-in rest timer and interval trainer start automatically when you log a set. Your log builds as you train — everything stored locally, nothing sent anywhere.

Replaces gym apps behind paywalls, notes apps repurposed for tracking sets

See it in action →

Utility KIN-028

Scan documents and photos to PDF using your camera or image library. Adjust brightness, contrast, and black-and-white. Crop, rotate, reorder pages. Export a clean multi-page PDF — no account, no upload, nothing stored.

Replaces CamScanner, Adobe Scan, Microsoft Lens — all behind accounts or paywalls

Build with us

Kin is a growing collective. If you've built a simple, free tool that helps people do something without asking for anything in return, we'd like to see it. No elaborate application. Just show us the thing.

Get in touch →

Suggest an app

Got an idea for a simple, free tool that helps people without asking for anything in return? We'd love to hear it.

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We've received your idea and will read it carefully.

Features

Data storage