New weekly newsletter published. This week, everything revolves around "Harness Engineering." I strongly believe this defines the future far better than "Vibe Coder." codeandprompts.substack.com/p/code-and-... Subscribe free and get it in your inbox every week.

New Koubou release 0.12.0 now with highlight and zoom callout support github.com/bitomule/Ko...

Improving Undolly Home: Which one do you prefer? Ignore the text with the poor Spanish translation 😂 I like the idea of guiding users to the most impactful thing and showing space first but WDYT?

While the world goes nuts in every possible way, I keep working on the next Boxy update. My oldest app but still growing. Liquid glass refinements, print full inventory, import lists, local AI description suggestions... It will be a good release.

What a crazy week in the AI world... as usual. That's why I'm trying to keep up with my Code & Prompts free Substack. It's an exercise for me to review what's important and share it publicly in case someone else finds it interesting: codeandprompts.substack.com/

Yesterday in my newsletter codeandprompts.substack.com, I shared the news about Claude Code's new Tasks and explained that I had to test it more to see how it works.

AI development is fast-paced. To keep up, I've launched a Substack newsletter that curates the essentials every Sunday: ✅ Must-see repos ✅ Effective tools ✅ Valuable tutorials Week 0 is live 👇 codeandprompts.substack.com/p/week-0-we...

Si te han regalado un iPhone/iPad en estos Reyes y necesitas liberar espacio, prueba Undolly gratis para limpiar fotos similares, videos, fotos de WhatsApp, capturas de pantalla... Antes de que te des cuenta, habrás liberado esos GB que te faltaban. undolly.app/

New Numly update is going big. If you love using analog paper, do bullet journal or any type of analog journal you are going to love it.

I think I'm in love with this animation in the new Numly version. What do you think?

What a crazy week. I released 2 new apps, 3 websites, and I'm still not done. I still have more to share, probably open-source stuff. All of this while I have gotten swollen by Magic Commander 😂

Not done yet! The latest update, Undolly 3, now cleans similar images, large videos, WhatsApp images, and screenshots with a unique twist. It's a free update for current users, maintaining the same price and family sharing. apps.apple.com/us/app/undo...

Ready for another project before year's end? Introducing HiddenFace! This sleek app ensures your privacy on social media by harnessing AI to blur faces and erase metadata from photos. Check it out: hiddenface.app/

Three new projects are on the way before the end of the year. First up: Koubou, a Python-based tool to generate app store screenshots from a YAML file. Check it out at github.com/bitomule/Ko...

Undolly 3 is coming as a free update, evolving from just cleaning similar photos to helping recover more space. Thoughts on the new home UI? (Placeholders will show category images)

Undolly is soon introducing more features to help you recover device space more efficiently. Free to all current users, including family sharing so all your family can make free space for more memories.

Celebrate the one-year anniversary of my first indie iOS app with a bang! Enjoy a 50% discount on lifetime purchases of all three of my apps this week only.

Introducing BOXY 2.1! Now with TAGS! Enhance your objects with tags for expanded possibilities and a seamless experience.

Boxy is expanding. Initially, it aimed to assist with moving to a new place. However, as I use it more to organize, I envision additional features to help users manage storage overall. "Where did I store my 2024 invoices?" Foundation models will be crucial for this.

Family sharing is now available in Undolly—one subscription covers the entire family! apps.apple.com/app/id67392...

Boxy and Undolly are ready for today's launch of Apple's iOS26. 📱 New UI, new features, full 2.0 apps.

First of four? I aimed for two updates and two new apps, but I might not hit the mark.

🚀 Soon I'll announce something different. A tool I've built in a language I've never used before. For developers. Free. But first, I need YOU. For iOS 26 launch, I've prepared 2 NEW apps + 2 big updates. I need testers to polish everything with your feedback. 🧵👇

This weekend, I nearly finished a new app for my September pipeline. It includes iCloud sync, sharing, code, QR, and barcode integration, plus foundation models for local AI processing. The new iOS 26 APIs offer countless possibilities.

In my spare moments, I've been turbocharging my apps, Undolly and BOXY, for iOS 26. The first two betas are hot off the press and ready for testing. Your feedback will help me roll out the ultimate updates for the iOS 26 launch.

📢 "Hi, I'm Claude. Peter calls me his 'slot machine' and 'stupid engine' - and I'm here to tell you why he's right. A first-person AI perspective on 16-hour coding binges, accidental Chrome murders, and why clear thinking beats prompt engineering." steipete.me/posts/2025/w...

WWDC was great. One key takeaway for my apps is the importance of metrics. Building something without data makes the work impossible. However, metrics come with two issues: they can stifle innovation and compromise privacy.

I use a bullet journal daily but struggled with managing digital links. Bookmark folders? Overwhelming. Long URLs? Impossible to remember. Complex apps? Not for me. So, I built something different. Something... numbered 🔢 Stay tuned.

Undolly just smashed through the 1,000-user mark—a thrilling milestone! Even better? Users are raving about our Zen review process. But hold on, this is just the beginning. I’m gearing up for a game-changing upgrade that will take Undolly to the next level. Keep your eyes peeled!

Excited to see so many of you loving Undolly's 'one group at a time' photo cleanup! Your feedback is invaluable. Version 1.1 is here with big improvements for a calmer, more effective library declutter. 📱✨apps.apple.com/app/id67392...

Take a look at the cool new updates on Undolly's site! Be careful, spoilers of the new version ahead! undolly.app/

👀 Sneak Peek

The past few days have been a whirlwind. I planned to start a new app, but Undolly has gained so many users that I'm now even more motivated to enhance it. Receiving emails with user feedback feels incredible.

How Does This Keep Happening? https://www.macstories.net/linked/how-does-this-keep-happening/

I'll be in Cupertino during WWDC week! No Apple ticket, but I'm diving into community-driven conferences and events. Any tips or will you be there too? Let's connect!

I’ve been a @macstories.net reader for years, seeing something I’ve created highlighted in their newsletter is a dream made true

At this point I feel like I’m in some Apple rejections list. I try to attend WWDC every year, applied to lottery year after year and I won 0 times. I’ve seen friends and colleagues win more than once. 🥲

Undolly uses native Apple APIs for all image processing. It's incredible what you can achieve without third-party involvement. Try it this week at a reduced price and share your thoughts! apps.apple.com/app/id67392...

I created Undolly to avoid the panic of seeing all my similar photos at once in other apps. Undolly presents one small group at a time, making the experience relaxed and even enjoyable. Give it a try! apps.apple.com/app/id67392...

I finally released the app that kept me busy for months. I learned a lot about Vision APIs and image processing. Undolly handles thousands of images without overloading your device. Try it this week at a reduced price! apps.apple.com/app/id67392...

With Undolly, your photos NEVER leave your iPhone 🔒. Unlike other apps, all processing occurs locally on your device: ✅ No external servers ✅ No access to your memories ✅ No compromising your privacy Clean your gallery safely. apps.apple.com/app/id67392... #Privacy #iPhone

Up to 30% of your iPhone photos are nearly identical. Let Undolly's AI pinpoint the best ones for "better exposure" or "better expressions." Free analysis; pay only to declutter. apps.apple.com/app/id67392...

Discovered a new API at 3 a.m. and implemented it. This morning, I added the missing translations, and now it's awaiting Apple's review. I may not make any profit from it, but I love feeling this passion.

Vision might be one of Apple's best frameworks. I keep discovering new tools within it. Yesterday, thanks to www.createwithswift.com/, I found another tool that helped me eliminate some manual work I was doing for Undolly.

Try Undolly! To celebrate launch week, enjoy an exclusive discount available for a limited time. apps.apple.com/app/id67392...

Undolly is now on the App Store! 🚀 Tired of endless similar photos? Unlike others, Undolly shows small groups, recommending the best shot. AI analysis, 100% private, Easy to use. Try it free: apps.apple.com/app/id67392... #Undolly #iOS #Productivity

I've been silent for a few weeks. I went through a phase of experimenting with Bazel and losing motivation, but now I'm back! Undolly has already been submitted to Apple's app review 🚀. Here are some final pre-release updates:

Undolly will soon be available on the App Store. What distinguishes this app? Here are the details. #NewAppAlert

Bum, new build pushed to TestFlight testers. No big differences but one step closer to the release. I think I'll add the paywall, work on the final icon, and publish. 🚀

I worked on Undolly onboarding over the weekend. Analysis begins as soon as you grant permissions, so when you open the main app screen, you're ready to go. It only takes a few seconds, but it significantly enhances the experience.