I make apps for humans.

Wipr icon


Enjoy a cleaner web.

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A Cleaner Web

Wipr blocks all ads, trackers, EU cookie notices, and other annoyances, so you can focus on the content that matters to you. It works in Safari and all apps that use Safari to display web pages.

Time, Data, and Battery Saver

Web pages load a lot faster with Wipr, and much less needs to be downloaded. Your mobile devices will love this.


Wipr prevents countless trackers from invading your privacy. Wipr itself cannot, nor wants to, know what you do on the web.


By using a new technology called Content Blocking Extensions, Wipr can do its job without slowing down Safari at all.


Wipr’s filters are updated twice a week to keep up with the ever-changing web.


No one can pay to unblock ads. There are no “acceptable ads”. Wipr only answers to you.


You can set up Wipr in seconds, and it will update automatically in the background to block future annoyances. There is no configuration.

Get It on the App Store

$1.99. For iPhone and iPad.

Get It on the Extension Gallery

Free. For Mac.

Binaural icon


A little help for your brain.

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Binaural beats are sounds that can help you relax, sleep, meditate, or even concentrate on a hard task.


A look and feel designed to help you relax and enjoy the experience. Comes with virtual rain and color themes.


Binaural does the math for you. Just wear your headphones, choose a color, and hit play.


You can control Binaural via Apple Watch, Control Center, the Lock Screen, or your headphones - with your eyes closed.


Binaural is available for iPhone, iPad, Apple Watch and Mac. You can easily transfer your session between devices using Handoff.

Get It on the App Store

Free. For iPhone, iPad, and Apple Watch.

Get It on the Mac App Store

Free. For Mac.

Swaipu icon


Hiragana, katakana, kanji: easy.

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Just swipe left or right, and stay in the flow. Swaipu won’t get in your way.


Swaipu contains 7 hand-crafted decks aimed at beginners, which you’ll master in no time. Start small and you’ll succeed!


20 kanji decks. JLPT N1 through N5, school grades 1 through 6, all Jōyō kanji… You name it. 12 kana decks with every kana ever.


Study in the order you prefer - you will never have to learn a character twice just because you switched decks.


One-tap integration with Nihongo - the best Japanese dictionary app - so you can lookup a ton of additional information for any kanji.

Get It on the App Store

Free. For iPhone.

Samples icon


Samplers used to be complex.

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Over a thousand samples, up to 30 seconds each. Your own drum machine, soundboard, or effect pad.


Very low latency. Seamless looping. Non-destructive reversing.


Non-destructive, precise trimming, with no pops or clicks. Per-sample labels and volume/pan controls.


AudioCopy support. Copy sounds across apps. Import files from your computer. Get professional loop packs from Loopmasters.

Get on the Bus

Stream live audio directly to other Audiobus compatible apps, or record from them.


Samples shines on stage with its dark, high contrast user interface, reliability, and performance.

Get It on the App Store

Free. For iPhone and iPad.

Catch icon


Broadcatching made easy.

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Never Miss an Episode

Catch is the easiest way to use ShowRSS on OS X. It’ll take care of everything. New shows will be downloaded as they are released.


Runs in the menubar, and won’t slow your Mac down one bit. Notification Center notifications are optional.


You can make Catch sleep at night (or at work, or whenever) + organize your torrents in folders + use your favorite BitTorrent client + update itself.


Speaks 11 languages, and you can add your own very easily.


Free. For Mac.

View Project on GitHub

Catch Is Open Source.

9digits icon

9 Digits

By Ivonne Engemann and Marcus Wagner.

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I helped the great folks at 9digits.de redesign their incredible Sudoku app - by far the best in the App Store. It also supports X-Sudoku, Killer Sudoku, and MathDoku - with hundreds of puzzles.

My favorite things about it are the mindbogglingly smart hint system, which actually helps you improve as a player, and the unique and very effective input system.

You can find more information at their website. Or, you know, you can get it right now (you should).