Calm, useful apps for everyday tasks.
LarkRiff makes clean, modern Android apps that respect your time: few ads, and never in the middle of what you are doing. Most things work offline, and a one-time purchase removes ads for good. No subscriptions.
Our apps
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Build Calc
Tell us what you are building and get exactly how much material to buy — in the bags, packs and pieces sold in your country. Results are estimates; always check product labels.
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Sound Meter
A calibratable decibel meter that never interrupts a measurement with an ad.
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Bubble Level
A precise spirit level, inclinometer, protractor and ruler in one clean app. Calibrate once and measure to 0.1°.
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Violin & Cello Tuner
A precise, beautiful tuner for violin, viola, cello, double bass, mandolin, banjo, ukulele, bouzouki, balalaika, domra, charango, cavaquinho, guitar and bass — with custom tunings, reference tones and a sample-accurate metronome.
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Air Quality Poland
Clear, fast air-quality information for your location in Poland, with a clean widget and smart smog alerts.
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Logic Puzzles
Elegant, ad-light classic logic puzzles — Bridges, Loops and Islands — with unique solutions, smart hints and endless generated levels.
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Solitaire – Big Cards
Calm, classic Spider, FreeCell and Klondike with big readable cards, unlimited undo and ads that never interrupt a game. Remove ads with a one-time purchase — no subscription.
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Flags Quiz
Learn every flag, capital and country shape with a quiz that actually teaches — spaced-repetition learning, daily challenges, fully offline.
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Spin the Wheel
Beautiful, fair random decisions — wheels, team maker, finger picker, dice and more, without ad spam. Results are decided with a secure random generator before the animation starts.
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How we build apps
Ads never interrupt
No ads while you measure, tune, play or spin. Full-screen ads only at natural breaks, and never on launch.
Pay once, not monthly
One small purchase removes ads for good. No subscriptions.
Your data stays with you
No accounts. What you create stays on your phone unless you choose to share it.
Works offline
Everything that does not strictly need the internet works without it.