Jörg Klausewitz
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Jörg Klausewitz
@klausewitz.de
27 followers 11 following 52 posts
CEO @ zensivo GmbH • #Neuropsychologist / #Psychologist • #Developer • #Entrepreneur. Passionate about #iOS #SwiftUI #Swift #Dev — building things that matter.
Hopelessly, enthusiastically in love with #London.
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klausewitz.de
Jörg Klausewitz @klausewitz.de · 6d
Start imperfectly. A bad app that exists can be improved. A perfect app that was never started is worthless.

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev
klausewitz.de
🎉 I just finished Day 22 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/22 via @twostraws.bsky.social

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #TVOS #indiedev #gamedev
Day 22 – 100 Days of SwiftUI
Follow the 100 Days of SwiftUI and learn to build apps for free.
www.hackingwithswift.com
December 8, 2025 at 4:41 AM
klausewitz.de
Vibe coding is basically vibe driving:

An autonomous car takes you somewhere and for a second you think, Nice, I’m making progress.

But you’re not the driver — which means you’re not a coder.

Which is why “vibe coding” is a perfect little #oxymoron.

#coding #swift #swiftui #vibecoding #indiedev
December 8, 2025 at 4:39 AM
klausewitz.de
#optionals #syntactic #sugar #swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #TVOS #indiedev #gamedev #swiftlang
December 7, 2025 at 5:08 PM
Reposted by Jörg Klausewitz
rbgkew.bsky.social
Do we have archives relating to your history? Probably! Our archive reflects global histories & is open to all. Conservator Shabnam Balouch has helped uncover our Persian archive, and you can find out more at an upcoming talk & our free public workshops in January! #EYAYourArchives #KewLA
Poster for an exhibition at Royal Botanic Gardens, Kew, titled 'Persia Reimagined: From Herbarium to Heritage'. The exhibition dates 30 September 2025 to 21 January 2026. The text is laid over a collage of archive materials: a coloured illustration of a yellow-flowered Rosa persica, yellow and orange Persian lime and typewritten text.
December 7, 2025 at 11:00 AM
klausewitz.de
For anyone currently working on Project 2 of #100DaysOfSwiftUI by @twostraws.bsky.social, I recommend #FlagKit — a collection of 255 flags available in both PNG and SVG.

github.com/madebybowtie...

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #TVOS #indiedev #gamedev
GitHub - madebybowtie/FlagKit: Beautiful flag icons for usage in apps and on the web.
Beautiful flag icons for usage in apps and on the web. - madebybowtie/FlagKit
github.com
December 7, 2025 at 12:54 PM
klausewitz.de
🎉 I just finished Day 21 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/21 via @twostraws.bsky.social

I’ve adjusted it a little to better fit my needs. #funwithflags

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev
December 7, 2025 at 12:50 PM
Reposted by Jörg Klausewitz
rbgkew.bsky.social
For #EYAAnniversaries, we delved into collections on our Millennium Seed Bank, which opened at Wakehurst 25 years ago. Among the reports & articles on the development of one of the world’s largest seed banks, we discovered publicity materials featuring none other than Sir David Attenborough! #KewLA
Various materials layered on top of each other so that corners and sections of pages are obscured. On the bottom is newsletter article opened on a two-page spread with a light green border and the title in the centre reads ‘The Millenium Seed Bank Project’. Underneath the title, two images are fully visible – on the left hand side, a person collecting seeds in Cumbria and to the right, a model version of the ‘Wellcome Trust Millennium Building’. Materials on top of the article from left to right are: section of a report on the Kew Seed Bank; a leaflet with a cream background and image of a small plant titled ‘Your Opportunity to Sponsor a Millennium Seed Bank Tree’; a leaflet with a logo of a plant with a green steam, yellow petals and a green globe in the centre reading ‘millennium seed bank appeal kew’ with a photograph of Sir David Attenborough outside the Palm House to the right. Article - MAFF Bulletin, Crown Copyright.
December 6, 2025 at 12:00 PM
klausewitz.de
🎉 I just finished Day 20 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/20 via @twostraws.bsky.social

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev
December 6, 2025 at 4:59 AM
klausewitz.de
🎉 I just finished Day 19 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/19 via @twostraws.bsky.social

Made a unit converter that also measures your caffeine needs. ☕️📱

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev #c
December 5, 2025 at 3:00 PM
klausewitz.de
🎉 I just finished Day 18 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/18 via @twostraws.bsky.social

Project #WeSplit completed with a few minor changes.

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev
December 4, 2025 at 12:58 PM
Reposted by Jörg Klausewitz
rbgkew.bsky.social
Did you know botanist Sir Joseph Hooker travelled with two Bhotea mastiff dogs? Today’s featured image for #ExploreYourArchive Week #EYAPets is a playful drawing from his letters, showing Kinchin the dog being ‘taught’ to write.
A letter which at the top includes a drawing in ink and the number ‘151’ printed and written in the top left corner. The drawing depicts from left to right: a pot cooking with steam rising from it; a Bhotea mastiff dog writing a note using a quill; a tent with a person sat at a table inside. There are mountains drawn in the background. Underneath, the letter notes that it was sent from Darjeeling on April 2. The contents of the letter discuss Joseph Hooker’s Bhotea mastiffs – Bruno and puppy Kinchin. It mentions that Kinchin is cleaned daily with mustard oil and woods ashes, he steals cheese from Joseph Hooker’s dinner and that Kinchin learnt English was being taught how to write. Ref: JDH/1/10, ff.151
December 3, 2025 at 5:02 PM
klausewitz.de
🎉 I just finished Day 17 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/17 via @twostraws.bsky.social

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev
December 3, 2025 at 4:06 AM
klausewitz.de
🎉 I just finished Day 16 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/16 via @twostraws.bsky.social

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev
Day 16 – 100 Days of SwiftUI
Follow the 100 Days of SwiftUI and learn to build apps for free.
www.hackingwithswift.com
December 2, 2025 at 5:20 PM
klausewitz.de
Start imperfectly. A bad app that exists can be improved. A perfect app that was never started is worthless.

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev
December 2, 2025 at 6:49 AM
klausewitz.de
🎉 I just finished Day 15 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/15 via @twostraws.bsky.social

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev
Day 15 – 100 Days of SwiftUI
Follow the 100 Days of SwiftUI and learn to build apps for free.
www.hackingwithswift.com
December 1, 2025 at 9:01 PM
Reposted by Jörg Klausewitz
rbgkew.bsky.social
What #EYABeauty lies on the inside of this unassuming folder? We're showing off Elsie Wakefield's fungi illustrations today 🍄 Wakefield became Head of Mycology at Kew Gardens in 1915 and our Archives hold her personal papers collection, which includes letters, illustrations and photographs. #KewLA
A blank grey paper folder on a brown wooden surface. Numerous coloured illustrations of mushrooms layered on top of each other so that corners and sections of pages are obscured. On each sheet there are light pencil annotations next to the illustrations.
November 30, 2025 at 10:00 PM
Reposted by Jörg Klausewitz
rbgkew.bsky.social
Plant taxonomy is disappearing - and so is our ability to protect species 🍂

Nearly half of countries have fewer than 10 plant taxonomists. Kew is working to close the gap, but we need more experts fast.

Read the study’s key findings and what we're doing about it 👇
https://ow.ly/XhJo50XyGAa
Illustration showing a person examining a plant with text about the scarcity of plant taxonomists worldwide.
December 1, 2025 at 10:00 AM
klausewitz.de
🎉 I just finished Day 14 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/14 via @twostraws.bsky.social

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev
Day 14 – 100 Days of SwiftUI
Follow the 100 Days of SwiftUI and learn to build apps for free.
www.hackingwithswift.com
November 30, 2025 at 4:55 PM
klausewitz.de
Checkpoint 9 of #100DaysOfSwiftUI via
@twostraws.bsky.social

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev

github.com/yokobuto/Hac...
Hacking-with-Swift/Checkpoint9.playground at 16997529d0094be144b82504ceedb77fd25ea594 · yokobuto/Hacking-with-Swift
Contribute to yokobuto/Hacking-with-Swift development by creating an account on GitHub.
github.com
November 30, 2025 at 4:54 PM
Reposted by Jörg Klausewitz
nhm-london.bsky.social
There’s friends, best friends, and then there’s the mutualistic relationship between the hornbill and the mongoose. See this peculiar pair in action in this week’s Surprising Science 🐾🪽
November 30, 2025 at 12:11 PM
klausewitz.de
🧠 Hot take on 100 Days Of #SwiftUI:

Is the Schrödinger's Cat analogy for #Swift optionals actually flawed? 🐱📦

Schrödinger implies superposition. A Swift #Optional is never nil and value at the same time — It's a mystery box, not quantum physics.

Am I overthinking this? 😅 @twostraws.bsky.social
November 30, 2025 at 11:17 AM
klausewitz.de
Checkpoint 8 of #100DaysOfSwiftUI via
@twostraws.bsky.social

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev

github.com/yokobuto/Hac...
Hacking-with-Swift/Checkpoint8.playground at 15bccc37497350111a50afc7446ac77f4503f3ff · yokobuto/Hacking-with-Swift
Contribute to yokobuto/Hacking-with-Swift development by creating an account on GitHub.
github.com
November 29, 2025 at 5:48 PM
klausewitz.de
🎉 Finished Day 13 of the #100DaysOfSwiftUI ! www.hackingwithswift.com/100/swiftui/13

@twostraws.bsky.social

Protocol extensions were a curveball at first — defining signatures in the protocol vs functionality in the extension!

#swift #swiftui #indiedev #gamedev #dev #coding #apple #mobile #app
Day 13 – 100 Days of SwiftUI
Follow the 100 Days of SwiftUI and learn to build apps for free.
www.hackingwithswift.com
November 29, 2025 at 5:18 PM
klausewitz.de
🎉 I just finished Day 12 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/12 via @twostraws.bsky.social

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev
Day 12 – 100 Days of SwiftUI
Follow the 100 Days of SwiftUI and learn to build apps for free.
www.hackingwithswift.com
November 28, 2025 at 8:42 PM
klausewitz.de
Checkpoint 7 of #100DaysOfSwiftUI via
@twostraws.bsky.social

#swift #swiftui #apple #dev #appdev #mobile #appstore #ios #macOS #iPadOS #watchOS #TVOS #indiedev #gamedev

github.com/yokobuto/Hac...
Hacking-with-Swift/Checkpoint7.playground at 6dd13bdd9bcdc7a81ecd9601a49963c955ed4d0e · yokobuto/Hacking-with-Swift
Contribute to yokobuto/Hacking-with-Swift development by creating an account on GitHub.
github.com
November 28, 2025 at 8:30 PM