Indie iOS developer with passion for building great apps. Improving the landscape of time tracking with https://xitter.cf/t.co/RtWRWCKJDt. https://xitter.cf/t.co/2cNTiKwPkM
Prague, Czech Republic
Joined September 2009
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Today marks 15 years of building apps for me. What a journey! There's been lots of trials and tribulations over the years, but I'm so grateful that I get to do what I love for work.
lukaspetr.com/15-lessons-fro…
Lukáš Petr retweeted
Timelines is now being featured as App of the Day in Canada! 🎉🇨🇦 Thank you @AppStore!
apps.apple.com/ca/story/id18…
Lukáš Petr retweeted
If you have an app on the App Store save this.
Apple just released the new iPhone Duo screenshot sizes:
Outer → 1398×2034 px
Inner → 2007×2853 px
Your App Store screenshots are about to need an update.
On my way from Birmingham to Aberystwyth for @IOSDEVUK . Really excited for this one! 😁
I’m super happy to finally have this released. Lots of under-the-hood improvements in there too.
Timelines 4.3 is now available! ✨
• Countdown Timers – stay focused on an activity for a set amount of time
• Improved Exporting – new options for excluding empty timelines and sorting by duration
• Lots of small improvements and bug fixes
blog.timelines.app/update-4-…
Lukáš Petr retweeted
Using the @timelines_app has been one of the best decisions I’ve made when it comes to tracking my time.
The simplicity and functionality is exactly what I’ve always looked for in a time tracking app.
I’ve also simplified the categories of what I spent time doing so I don’t take too long making the decision of what’s next when switching from one task to another.
I hope this helps somebody else keep their time on check 💪
Lukáš Petr retweeted
This session about lazy stacks and scrolling in SwiftUI will blow your mind. There are so many details that will help you understand how these things actually work. #WWDC developer.apple.com/videos/p…
I’m not sure how I feel about the new outlines around all liquid glass elements. It feels like it will take some time getting used to it. #wwdc
🚨 PSA: In SwiftUI, if you use ToolbarItem that has a Button, and that button uses an Image as its label, you'll end up with a very small tappable area of the button. You need to use a Label to avoid that effect:
Label("Start", systemImage: "play").labelStyle(.iconOnly)
You can see in the video that the button shows the effect of being tapped, but it doesn't call the handler until I tap it directly in the middle, on the image itself.
This is the replacement you need to make. Full credits for discovering go to this Reddit thread: reddit.com/r/SwiftUI/comment…
Absolutely delighted to see @timelines_app be featured on the @AppStore in Brazil as App of the Day 🥳 #OnTheAppStore
Lukáš Petr retweeted
Timelines is now featured on the App Store as App of the Day! 🚀🇧🇷🥳 apps.apple.com/us/story/id18…
Lukáš Petr retweeted
Make the most of every 24 hours. wired.trib.al/bgmyVLD
Happy New Year, everybody! 🎉
As is my tradition, I wrote a blog post looking back at my 2025.
It has lessons learned from full-time indie development, my favorite conferences, main takeaways for 2026, and more. I'd love to hear what you think!
lukaspetr.com/looking-back-a…
Lukáš Petr retweeted
I finished a 66-page guide on Apple Ads.
No sales BS, no "link in DM"
Here it is: asa.sparrowapps.io/
Do me a favor – drop a comment below to confirm you got it.
I'm super happy to finally have this released, just in time for the holidays.
Timelines 4.2 is now available! 🚀
• Exporting to calendars – view your tracked time alongside your planned events
• Event name goals – track progress for specific subcategories.
• Active tracking reminders for individual timelines.
Read more here: blog.timelines.app/update-4-…
