Apps for Apple platforms

Tools that do one job, beautifully.

Puff Labs builds focused apps for iPhone, iPad, Mac, Apple Watch, Apple TV and Apple Vision Pro. Your files, scripts and records stay on your own devices. No account to create, and no tracking.

On the App Store

Each one does a single job, on every device it runs on.

Runlow: AI Usage Meter

See how much of your Claude, Codex, Gemini, Cursor, Copilot and OpenRouter usage is left, at a glance, on every device you own.

£1.99iPhone · iPad · Mac · Watch · Vision Pro
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Reprompt: Teleprompter

A teleprompter for people who film themselves. Free to use, with Pro as a one-time unlock for recording, unlimited scripts and file import.

FreeiPhone · iPad · Mac · TV · Watch
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Recast: Convert & Compress

Convert or compress almost any file on your iPhone or iPad, to a size you pick. Everything happens on the device, so your files never leave it.

FreeiPhone · iPad
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Refast: 16:8 Fasting Timer

An intermittent fasting timer you can fix when you forget. Nudge the start back, set the real end time, or add a fast by hand.

FreeiPhone · iPad · Mac · Watch
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GainScout: BNG Land Finder

Check any field in England for biodiversity net gain potential, against official government data, with the source shown for every finding.

FreeiPhone · iPad · Mac
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Gridsong: Music Maker

Write music on a grid. Tap out a pattern, press play, keep going until it sounds right. Locked to a scale, so nothing you tap can sound wrong.

FreeiPhone · iPad · Mac
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Merestone: SSSI & Habitat Map

Protected sites, habitats and heritage on one map, from official data, with a radius search and a dated PDF. The UK, Ireland, France, Spain, Portugal, the Netherlands, Belgium, Germany and Switzerland.

FreeiPhone · iPad · Mac · Watch
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Latest update

All updates →

Runlow 1.8.5 · Themes, a setup wizard, and your Lock Screen card your way

Seven themes, nine typefaces, bars in blocks, a card that fits up to eight meters, and bigger widgets with a refresh button. Out now.

GainScout · Smoother by default

A progress bar while a check runs, a short walkthrough for anyone new, and quicker moves after saving a site or building a report. Out now.

Reprompt & Gridsong · Both are now free

Free downloads, with Pro as a single optional unlock you buy once. Already own either app? Pro comes with it, nothing more to buy.

GainScout and Gridsong · Both on the App Store

GainScout checks any field in England for biodiversity net gain potential against official government data. Gridsong is a music grid locked to a scale, so nothing you tap can sound wrong.

About

Puff Labs is a small independent studio based in the UK, run by Leon Figueira. The person who answers your email is the person who built the app. Every app here does its work on your device, and what you make in them is never sent to a server of ours, because the best way to keep your data private is not to collect it.

Something not working, or an idea for what to build next? Get in touch.