Jeroen Leenarts
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appforce1.net
Jeroen Leenarts
@appforce1.net
AppForce1 on many platforms. Run Do iOS, host a podcast.
Here's the deal. You share with me why you are the perfect candidate to receive a free ticket to Do iOS in November. On behalf of @Guardsquare we can allocate 2 tickets to the perfect candidates.

Suggesting another person is also ok. DM, reply, email, any channel is ok.
October 22, 2025 at 12:57 PM
Big shoutout to @hedge.co. The first company to send a team of 5 or more colleagues to Do iOS! Who can top them?

Like by sending your team to the workshops too maybe?

Welcome Hedge. Make sure to talk to them at the conf. THeir products look super interesting.
October 3, 2025 at 9:52 AM
"Most satisfying fix of the week: a mysterious moving volume slider bug." Shared my journey refactoring an audio engine and managing background tasks in iOS. Sometimes the best code is the code you don't write. Listen to the full story now. #SwiftDev www.buzzsprout.com/1414396/epis...
AppForce1 Worklog: When Your Volume Slider Has a Mind of Its Own - AppForce1 Worklog
Make sure to let me know what you think of this episode.I completely refactored an audio system for a work app, splitting a single AVAudioEngine into separate engines for recording and playback. This ...
www.buzzsprout.com
September 22, 2025 at 11:13 AM
After migrating 20+ packages for RocketSim, Antoine is back to share his experiences of adopting Strict Concurrency.

by Antoine van der Lee @avanderlee.com

Do iOS, Amsterdam, November 12 & 13.
do-ios.com
September 17, 2025 at 11:23 AM
Something I wrote recently. :)
May 7, 2025 at 7:54 AM
Rebooting my podcast for 2025 again. Interested in being a guest? Please reach out.
December 17, 2024 at 9:26 AM
Reposted by Jeroen Leenarts
This Week In React 213

Read/subscribe online:
thisweekinreact.com/newsletter/213

⚛️
- React 19
- Next.js
- React Compiler
- React Router
- Restyle
- Lingui
📱
- State of RN
- Uniffi
- Shared Objects
- Fast IO
- Sheet Transitions
- Radon
December 11, 2024 at 6:25 PM
I now know too much about AV1 and h264 codecs. 🥴

getstream.io/blog/av1-h264/
Av1 vs. H264 - Which Codec Should You Use?
Learn more about two types of video codecs, learn which one to use based on your video quality goals, and how they stack up on key features.
getstream.io
December 11, 2024 at 10:44 AM
More videos online for Do iOS. :) Count is at 7 videos now. With talks by @felibe444.bsky.social @avanderlee.com @0xtim.bsky.social and others.

Here's a list with all of them, subscribe on YT to get updated on the remaining 8 videos.

www.youtube.com/playlist?lis...
Do iOS 2024 - YouTube
www.youtube.com
December 2, 2024 at 11:17 AM
Passkeys: the why, the what, the how

By @0xtim.bsky.social at Do iOS. :)

youtu.be/ojTDJuwfVgg
Passkeys: the why, the what, the how
YouTube video by AppForce1
youtu.be
November 29, 2024 at 3:19 PM
Finally I was able to render a video. Had some fun using Magnetic AI in Final Cut Pro on @avanderlee.com's talk at Do iOS.

From Side Project to Going Indie.

www.youtube.com/watch?v=ixe1...
From Side Project to Going Indie
YouTube video by AppForce1
www.youtube.com
November 28, 2024 at 11:22 PM
My book at LeanPub is on sale again. :) leanpub.us3.list-manage.com/track/click?...
Being a lead software developer
Learn best practices for being a great lead software developer on your own terms.
leanpub.us3.list-manage.com
November 28, 2024 at 10:15 AM
Best part of onboarding a new team member: Fresh insights and new experience we can build upon.

@stefanblos.com @theankurtyagi.bsky.social :)
November 28, 2024 at 9:10 AM
Too many hours. 😂
November 28, 2024 at 12:14 AM
Reposted by Jeroen Leenarts
WebRTC in Jetpack Compose 1.0.4 has been released.

📱 This project demonstrates WebRTC protocol to facilitate real-time video communications with Jetpack Compose.

github.com/GetStream/we...
GitHub - GetStream/webrtc-in-jetpack-compose: 📱 This project demonstrates WebRTC protocol to facilitate real-time video communications with Jetpack Compose.
📱 This project demonstrates WebRTC protocol to facilitate real-time video communications with Jetpack Compose. - GetStream/webrtc-in-jetpack-compose
github.com
November 27, 2024 at 3:29 PM
Ooh nice tip @stefanblos.com I got a custom domain here now as well. :D
November 27, 2024 at 3:09 PM
Having some fun with Final Cut pro.... But it does take ages to process.

No worries @peterfriese.dev the lobster look is only during processing.
November 26, 2024 at 3:48 PM
The first video for Do iOS is rendering right now.

Where should I upload these? Youtube right?
November 26, 2024 at 10:10 AM
Conference organizer life.

Ticketing platform made their payments... Let's start paying some open invoices... starting with the biggest (venue).

Payment made.

"We detected unusual behavior on your account, while we investigate your account has been temporarily suspended."
Waiting Hmm GIF
ALT: Waiting Hmm GIF
media.tenor.com
November 25, 2024 at 9:35 AM
👍 Closing the books on the 2024 edition next week. Opening the books on 2025 edition in January.
November 23, 2024 at 12:48 PM
Do iOS went well last week. Waiting for the ticket settlement. Then close all open balances. 👍

Let’s do it again in 2025. 👍
November 19, 2024 at 6:53 AM
Meet Speedy, the harbinger of chaos. But he is very cute.
August 21, 2023 at 7:34 PM
Hello everyone,

My name is Jeroen. I do something mostly related to iOS development. I automate my home carefully not to upset the acceptance factor with my family.

I live in the Netherlands with 2 kids and my wife.

And organize cocoaheads.nl and do-ios.com
August 21, 2023 at 8:27 AM
Ok, so now what. :D
August 21, 2023 at 8:17 AM