Jörg Klausewitz's Avatar

Jörg Klausewitz

@klausewitz.de.bsky.social

CEO @ zensivo GmbH • #Neuropsychologist / #Psychologist • #Developer • #Entrepreneur. Passionate about #iOS #SwiftUI #Swift #Dev — building things that matter. Hopelessly, enthusiastically in love with #London.

22 Followers  |  12 Following  |  44 Posts  |  Joined: 16.11.2025  |  2.1236

Latest posts by klausewitz.de on Bluesky

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🎉 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

04.12.2025 12:58 — 👍 6    🔁 3    💬 0    📌 0
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

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

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.

03.12.2025 17:02 — 👍 21    🔁 9    💬 2    📌 0
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🎉 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

03.12.2025 04:06 — 👍 4    🔁 2    💬 0    📌 0
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Day 16 – 100 Days of SwiftUI Follow the 100 Days of SwiftUI and learn to build apps for free.

🎉 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

02.12.2025 17:20 — 👍 2    🔁 1    💬 0    📌 0

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

02.12.2025 06:49 — 👍 8    🔁 2    💬 0    📌 0
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Day 15 – 100 Days of SwiftUI Follow the 100 Days of SwiftUI and learn to build apps for free.

🎉 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

01.12.2025 21:01 — 👍 8    🔁 2    💬 0    📌 0
 A blank grey paper folder on a brown wooden surface.

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.

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.

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

30.11.2025 22:00 — 👍 41    🔁 16    💬 0    📌 3
Illustration showing a person examining a plant with text about the scarcity of plant taxonomists worldwide.

Illustration showing a person examining a plant with text about the scarcity of plant taxonomists worldwide.

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

01.12.2025 10:00 — 👍 42    🔁 30    💬 0    📌 2
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Day 14 – 100 Days of SwiftUI Follow the 100 Days of SwiftUI and learn to build apps for free.

🎉 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

30.11.2025 16:55 — 👍 7    🔁 2    💬 0    📌 0
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Hacking-with-Swift/Checkpoint9.playground at 16997529d0094be144b82504ceedb77fd25ea594 · yokobuto/Hacking-with-Swift Contribute to yokobuto/Hacking-with-Swift development by creating an account on GitHub.

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...

30.11.2025 16:54 — 👍 7    🔁 2    💬 0    📌 0
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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 🐾🪽

30.11.2025 12:11 — 👍 64    🔁 11    💬 1    📌 3

🧠 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

30.11.2025 11:17 — 👍 3    🔁 0    💬 0    📌 0
Hacking-with-Swift/Checkpoint8.playground at 15bccc37497350111a50afc7446ac77f4503f3ff · yokobuto/Hacking-with-Swift Contribute to yokobuto/Hacking-with-Swift development by creating an account on GitHub.

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...

29.11.2025 17:48 — 👍 8    🔁 2    💬 0    📌 0
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Day 13 – 100 Days of SwiftUI Follow the 100 Days of SwiftUI and learn to build apps for free.

🎉 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

29.11.2025 17:18 — 👍 8    🔁 2    💬 0    📌 0

Capitalism leaves many people resentful, prompting them to vent nonsense on the very platforms built by the billionaires they disdain.

29.11.2025 13:04 — 👍 1    🔁 0    💬 0    📌 0
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Day 12 – 100 Days of SwiftUI Follow the 100 Days of SwiftUI and learn to build apps for free.

🎉 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

28.11.2025 20:42 — 👍 2    🔁 2    💬 0    📌 0
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Hacking-with-Swift/Checkpoint7.playground at 6dd13bdd9bcdc7a81ecd9601a49963c955ed4d0e · yokobuto/Hacking-with-Swift Contribute to yokobuto/Hacking-with-Swift development by creating an account on GitHub.

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...

28.11.2025 20:30 — 👍 6    🔁 2    💬 0    📌 0

Checkpoint 6 of #100DaysOfSwiftUI via
@twostraws.bsky.social

github.com/yokobuto/Hac...

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

28.11.2025 11:07 — 👍 4    🔁 2    💬 0    📌 0
A wide, atmospheric night photograph of the London skyline taken from the Millennium Bridge facing east over the River Thames. The dark water in the foreground is rippled and reflects the city's yellow and orange lights.

On the right side, the tall, sharp spire of "The Shard" pierces the cloudy night sky. On the left, the illuminated office buildings of the City of London are visible, including the "Walkie Talkie" building.

Bridges span the river in the center: Southwark Bridge is visible in the middle ground with violet lighting, and the iconic towers of Tower Bridge can be seen illuminated in the far distance.

A wide, atmospheric night photograph of the London skyline taken from the Millennium Bridge facing east over the River Thames. The dark water in the foreground is rippled and reflects the city's yellow and orange lights. On the right side, the tall, sharp spire of "The Shard" pierces the cloudy night sky. On the left, the illuminated office buildings of the City of London are visible, including the "Walkie Talkie" building. Bridges span the river in the center: Southwark Bridge is visible in the middle ground with violet lighting, and the iconic towers of Tower Bridge can be seen illuminated in the far distance.

#London nights never disappoint. ✨

Standing on the #MillenniumBridge looking down the #Thames always feels special.

You’ve got The Shard dominating the right, the City on the left, and if you look closely, the iconic #TowerBridge glowing in the distance.

#TheShard #UK

27.11.2025 18:25 — 👍 1    🔁 0    💬 0    📌 0
Black and white photograph showing a large tree sitting in a cart attached to three horses who are ready to pull it across the Gardens. The reigns of each horse are held by a handler and the faint outline of Kew's Palm House can be seen in the background.

Black and white photograph showing a large tree sitting in a cart attached to three horses who are ready to pull it across the Gardens. The reigns of each horse are held by a handler and the faint outline of Kew's Palm House can be seen in the background.

On #NationalTreeWeek we'd like to highlight the incredible efforts of Kew's past colleagues who were faced with the challenging task of moving trees across the Gardens. This photograph from Kew's Library and Archives depicts William Barron's ingenious horse-drawn tree transporter 🌳 #KewLA

27.11.2025 15:28 — 👍 25    🔁 5    💬 1    📌 0
A photo of Kew Palace in London on a sunny day. The historic building is constructed of bright red brick with distinctive Dutch-style gables and tall chimneys on the roof. It features multiple rows of white sash windows. The palace is framed by green trees on the left and right, with a manicured green lawn stretching out in the foreground. To the right on the grass stands a white stone sundial. The sky above is blue with scattered white clouds.

A photo of Kew Palace in London on a sunny day. The historic building is constructed of bright red brick with distinctive Dutch-style gables and tall chimneys on the roof. It features multiple rows of white sash windows. The palace is framed by green trees on the left and right, with a manicured green lawn stretching out in the foreground. To the right on the grass stands a white stone sundial. The sky above is blue with scattered white clouds.

A glorious day at the Royal Botanic Gardens! 🌿☀️ #Kew #Palace, also known as the "Dutch House," looks stunning in the autumn sun. As the smallest of all royal palaces, it is a true architectural gem hidden in West London.

#KewGardens #London #Royal #Architecture #Britain #TravelDiaries #SunnyDay

27.11.2025 14:40 — 👍 3    🔁 0    💬 0    📌 0
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Day 11 – 100 Days of SwiftUI Follow the 100 Days of SwiftUI and learn to build apps for free.

🎉 I just finished Day 11 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/11 via @twostraws.bsky.social

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

27.11.2025 14:29 — 👍 9    🔁 3    💬 0    📌 0
Cartoon-style illustration of Steve Jobs in a black turtleneck with a smirking expression, drawn like a meme. Next to him is the text “NSObject” in bold letters on a light blue background.

Cartoon-style illustration of Steve Jobs in a black turtleneck with a smirking expression, drawn like a meme. Next to him is the text “NSObject” in bold letters on a light blue background.

Anyone else still think of Steve #Jobs every time they use classes starting with #NS, like #NSObject?

#iOS #Swift #SwiftUI #ObjectiveC #Apple #Dev #History #Humor #SteveJobs #Indie #IndieDev #Game #GameDev #macOS #watchOS #TVOS #NeXTStep #OPENSTEP

27.11.2025 07:35 — 👍 10    🔁 2    💬 0    📌 0
Bright red, orange, and golden autumn leaves filling the frame of a tree in Kew Gardens. Sunlit foliage contrasts with a deep-blue sky and a few small clouds in the background.

Bright red, orange, and golden autumn leaves filling the frame of a tree in Kew Gardens. Sunlit foliage contrasts with a deep-blue sky and a few small clouds in the background.

#Kew Gardens in full autumn fire — glowing reds and golds under a perfectly blue #sky. 🍁✨
Every corner feels like a painting this time of year.

#KewGardens #AutumnAtKew #FallColors #NaturePhotography #LondonParks #Golden #Season #London #Richmond #Photography #Nature

26.11.2025 14:34 — 👍 11    🔁 0    💬 0    📌 0
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Day 10 – 100 Days of SwiftUI Follow the 100 Days of SwiftUI and learn to build apps for free.

🎉 I just finished Day 10 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/10 via @twostraws.bsky.social

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

26.11.2025 14:27 — 👍 6    🔁 2    💬 0    📌 0

Dem Bild nach, handelt es sich eher um ein #Salamiverbot.

26.11.2025 11:54 — 👍 2    🔁 0    💬 0    📌 0
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Day 9 – 100 Days of SwiftUI Follow the 100 Days of SwiftUI and learn to build apps for free.

🎉 I just finished Day 9 of the #100DaysOfSwiftUI at www.hackingwithswift.com/100/swiftui/9 via @twostraws.bsky.social

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

25.11.2025 17:15 — 👍 6    🔁 1    💬 0    📌 0
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Hacking-with-Swift/Checkpoint5.playground at 6bd4edd2305818776efcbffaef6ae9884dc9b3fb · yokobuto/Hacking-with-Swift Contribute to yokobuto/Hacking-with-Swift development by creating an account on GitHub.

Checkpoint 5 of #100DaysOfSwiftUI via @twostraws.bsky.social

github.com/yokobuto/Hac...

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

25.11.2025 17:15 — 👍 6    🔁 1    💬 0    📌 0
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a cartoon character is covering his eyes with his hands . Alt: Stitch pulls down his own eyelids in exasperation, expressing comic frustration.

Me trying to understand #Swift #closures.

@twostraws.bsky.social

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

25.11.2025 10:47 — 👍 5    🔁 2    💬 0    📌 0
A small, black, Cavapoo sitting on green grass, looking up. The dog is wearing a dark red and yellow festive jumper, with decorated with a T. rex skull and ammonites. Behind the dog, there’s a bush with red leaves.

A small, black, Cavapoo sitting on green grass, looking up. The dog is wearing a dark red and yellow festive jumper, with decorated with a T. rex skull and ammonites. Behind the dog, there’s a bush with red leaves.

A Border Collie sitting on fallen leaves. The dog is wearing a dark red and yellow festive jumper, with decorated with a T. rex skull and ammonites.

A Border Collie sitting on fallen leaves. The dog is wearing a dark red and yellow festive jumper, with decorated with a T. rex skull and ammonites.

This year, we’re upping our Christmas jumper game with our first ever festive jumper for dogs! 🐶🎄

As you can see here modelled by Sky the Cavapoo and Jack the Border Collie, it’s the perfect accessory for your winter walkies or cosy evenings at home.

25.11.2025 10:15 — 👍 24    🔁 3    💬 2    📌 1

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