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Weekly Dev Log 2026-W07

🗓️ This Week Completed two more sections of the SwiftUI tutorial 🦾 As I continue working through the tutorial, I can feel my understanding of SwiftUI …

How iOS developers actually get paid: a practical guide to Apple's fiscal calendar

You ship your app. Sales start showing up in App Store Connect. And then you wait. The money doesn't arrive on the first of the month like a paycheck,…

We built a puzzle game about noticing the one thing that's wrong

There's a specific kind of satisfaction in noticing something is wrong before you can explain why. You're looking at a grid of geometric shapes. Each …

We built a mahjong dangerous-tile predictor calibrated on 4.97M real hands

The problem At a real mahjong table, software can't help you mid-hand. The question — "is this tile safe to discard?" — comes up every few turns, and …

Building a Privacy-First AI App for Patient & Caregiver Doctor Visit Notes

Hi DEV Community, I wanted to share a project I've been working on called AI Doctor Notes. It’s an app built specifically to solve a common problem: w…

We built a weather app that stops pretending everyone feels the same temperature

Most weather apps answer the wrong question. They tell you it's 12°C outside. That's accurate. But whether 12°C means you need a coat depends entirely…

Building Calendar ToDo: Turning Calendar Events into a Done List with SwiftUI and EventKit

Sometimes I want to look back at my calendar and know not only what I planned, but what I actually did. For example: Did I finish my study session? Di…

How I made a perfect recording button. Simple yet complex thing.

Intro From the start of XSpeak , I wanted it to provide the best possible feel for the user: simple, fast, and responsive. Since it's a recording app,…

Why Reading Food Labels Shouldn't Feel Like Decoding a Chemistry Exam

Millions of people with dietary restrictions struggle with food labels every day. Here's the real problem — and how we built SafeScan to fix it. The H…

Weekly Dev Log 2026-W06

🗓️ This Week Made a little more progress in the SwiftUI tutorial🦾 Started the journey of building my future portfolio site✈️ First, I created the proj…

We built a leg-fidget counter. Here's what that actually took.

The problem nobody is measuring Non-Exercise Activity Thermogenesis — NEAT — is the energy your body burns doing everything that isn't deliberate exer…

Building an Open Source One Sec Alternative: Breaking the Shortcuts Infinite Loop Thanks to iOS 26

If you've ever tried to build an iOS app that intercepts another app's launch, a custom launcher, a Screen Time blocker, a digital wellbeing tool, you…

Tollere got an update. Still intentionally simple.

A few weeks ago I wrote about launching Tollere on the App Store . Since then, quite a few people started using it daily for actual grocery runs, shar…

We shipped an on-device Japanese braille reader — here's why offline-first was non-negotiable

The problem sitting in plain sight There's braille on train handrails, elevator buttons, and pill boxes all over Japan. Most people walk past it every…

We built a finance app that refuses to ask for your bank login

The problem with most expense trackers Most personal finance apps assume you'll hand over your bank credentials. The whole UX is designed around that …

Bug Archeology: Solving a decade-old Swift/C++ mystery (with LLMs)

I built GhostType: inline AI text completion for every app on macOS

Writing the same kind of sentences over and over — meeting replies, status updates, polite refusals — eats a surprising amount of the day. LLMs can fi…

We shipped a one-mechanic puzzle app — here's what we built and where it falls short

The premise Most mobile games compete on stimulation: timers, streaks, daily missions, push notifications. We wanted to go the opposite direction. Off…

Stop using Codable everywhere.

You’ve been over-engineering your Swift models. “Should this model be Decodable or Codable? Am I doing this wrong?” — Here's how to pick the right one…

I built my daughter a geography app. It took 67 days and zero dependencies.

Two months ago, I started building an iOS app for my daughter. This week, I shipped it. MapSprout is a US geography app for kids — they learn the 50 s…

Local Multimodal LLM on iOS with `llama.cpp` (Swift + ObjC++)

I want a real local pipeline: image in, structured JSON out, no cloud dependency. Optimized to run Metal / ANE or whatever apple exposes ? My goal is …

We shipped an app that counts your fidgets — here is why NEAT science pushed us to do it

The itch Levine's NEAT (Non-Exercise Activity Thermogenesis) research stopped us mid-scroll: habitual fidgeters can burn around 350 kcal more per day …

Weekly Dev Log 2026-W04

🗓️ This Week I had a long holiday during Golden Week in Japan and really enjoyed the break! Because of that, I didn't have as much learning time compa…

We built a braille reader that runs entirely on your iPhone — no server, no photos sent anywhere

The problem we kept noticing Braille is everywhere in Japan — train handrails, elevator buttons, pill packaging, ATM panels. Most people walk past it …

Your parity gate must enforce the number you publish: a testing methodology for porting ML models across runtimes

You ship an ML model port from Python to another runtime — Swift, C++, ONNX, whatever. The build succeeds. The model loads. You feed it the canonical …

How I rebuilt the Codable migration pattern across 4 iOS apps in 2 hours

I was adding a single new feature to DaysUntil: yearly-recurring events. Twenty lines of product code. But underneath, the data layer needed a pattern…

Rejourney Session Replay Now Open Beta for Swift

After nearly 3 months of battle testing our React Native package, and recording over 1.5 million session replays from users all over the world, we now…

I built an AI planner that forces you to do only 4 things a day — here's why

I have a confession: I'm a productivity app addict. Notion, Todoist, Things, TickTick, Bear, Obsidian — I've tried them all. And every single one fail…

Mastering SwiftData: Building Persistent "Memory" for Your Next AI Chatbot

Imagine an AI chatbot that forgets everything the moment you close the app. Every interaction starts from scratch, every preference is lost, and the "…