Being a pretty big coffee nerd in my free time, I was excited to hear about the release of the Fellow Opus - a capable entry-level grinder meant for beginners at a very competitive price point. However, the adjustment mechanism for the grind size is fairly complicated and has led to people shying away from getting the grinder.

On a lazy Sunday, I decided to build a very simple app to help people intuitively understand the mechanism and dial in the perfect coffee. The app was received very well (see comments on the accompanying Reddit post), so much so that Fellow decided to send me a unit as a thank you gift for creating it.

Links

Over the course of my multiple Flutter projects, I authored a variety of open source packages for the Flutter ecosystem. The following presents a quick overview over most of them:

Scribble

scribble | Flutter Package

Scribble is a lightweight library for freehand drawing in Flutter supporting pressure, variable line width and more!

Dart packages

The most popular among my packages is scribble, a lightweight library for freehand drawing in Flutter supporting pressure, variable line width and more. It arose out of the need for custom freehand notes for the fyzo Assistant application and has amassed over a hundred thumbs up on pub.dev.

Figmage

figmage | Dart package

A CLI tool for generating Figma styles for Flutter

Dart packages

As part of my whynotmake.it project, I co-authored Figmage, a CLI that automatically imports the tokens for an entire Design system from Figma into a standalone Flutter package. Figmage is the first tool of its kind to support Figma styles and variables alike, which makes it extremely flexible and powerful for fast-paced, iterative development.

Dart Coverage Assistant

GitHub - whynotmake-it/dart-coverage-assistant: Magically generates code coverage reports from your dart projects

Magically generates code coverage reports from your dart projects - whynotmake-it/dart-coverage-assistant

GitHubwhynotmake-it

Dart Coverage Assistant is a GitHub Action that automatically generates coverage reports and badges for Dart and Flutter monorepos. It works without any configuration, and dynamically finds all packages in the repository. I published this action as part of the whynotmake.it project.

Broody Video

broody_video | Flutter Package

The video manipulation library for broody. iOS only for now.

Dart packages

Although broody_video is still in development, it has the potential to become one of the most feature-rich video transcoding plugin in the Flutter ecosystem. It leverages native Android/iOS APIs to achieve a better performance than FFMPEG, while enabling projects that can't be published under GNU GPL.

At this point, the plugin supports, trimming, cropping and compressing video clips, as well as extracting thumbnails. The package was co-authored with Jesper Bellenbaum, just like the Broody app.

Value Notifier Tools

value_notifier_tools | Flutter package

Helpful lightweight tools for working with ValueNotifiers

Dart packages

This package adds versatile functionality to Flutter's ValueNotifier, such as undo/redo support, rebuild filtering or the transformation of values.

It was built by me as part of the Scribble package.

Smooth Video Progress

smooth_video_progress | Flutter Package

An interpolated progress builder for video_player controllers

Dart packages

Most Flutter apps that want to display video do so by depending on the video_player package. While creating Broody, I was frustrated with the janky UX that this creates, since the native video player library sends progress updates too infrequently. Therefore, smooth_video_progress was created to interpolate the inbetween values for a smoother user experience.

Rotation Stage

rotation_stage | Flutter Package

A four-sided stage for representing 3D objects with four widgets

Dart packages

rotation_stage, another co-op with Jesper Bellenbaum, offers a clever way of presenting a four-sided object in a Flutter widget by using matrix transformations. It is probably easiest to convey it's functionality in a short GIF:

The two apps "fyzo Coach" and "fyzo Assistant" offer a refreshing new take on software for Physical Therapists and their patients.

As Co-Founder, Design and UX Lead at fyzo, I was responsible for the entire visual design of the software and marketing materials, as well as the planning and execution of user interviews. Furthermore, I also contributed over 50% of the codebase as full-stack developer to the technical implementation of the applications until my exit in May 2023, and played a significant role in the agile project management.

The software included a variety of technologies in it's tech stack, all of which I was deeply involved in. This includes:

• Flutter
• Firebase Auth, Cloud Functions, Cloud Firestore, Storage
• Matomo Analytics
• Stripe Connect
• GitHub Actions
• Fastlane
• Ghost (website)

At the time of my exit, the fyzo Apps were used by physical therapy practices in multiple countries every day.

If you want to learn more about the company and the products, head to www.fyzo.de (German).

At the beginning of the Invasion of Ukraine in 2022, I volunteered to build a website for the non-profit Ukraine Help Now.

The website was set up as a Ghost Theme, so that the organization can manage their content without my support.

Visit the website here to learn more: www.ukraine-help-now.de

Broody was created from the frustration of wanting to record a personal video diary, but not finding any existing apps that don't collect any data, are easy to use and free.

The app was designed and built by Jesper Bellenbaum and myself in our free time and published under the GNU GPL. It received more than a thousand downloads across both mobile app stores without any marketing whatsoever and continues to be used daily by many. It also lead to the publishing of a new video transcoding package for Flutter.

Features:

• Customisable clip duration per project
• Easy to use video editor
• Absolute privacy: All data remains on device
• Daily reminders
• Unlimited projects, each with custom settings
• Beautiful and intuitive design
• Personalised colors per project and video

Links:

GitHub - no-one-works/broody: World’s greatest mobile video diary.

World’s greatest mobile video diary. Contribute to no-one-works/broody development by creating an account on GitHub.

GitHubno-one-works

Inspired by the research of Terzimehić et. al., I designed and developed the Memento app as a practical course at LMU Munich.

The aim of this project was to explore the ways in which people use internet memes to express feelings and process their day-to-day lives by presenting a fusion between a daily journal and a meme editor. Users can track their mood, create a meme and write a diary entry to go with it.

Memento was built in Flutter and features a custom-built, fully-featured WYSIWYG meme editor and a Firebase serverless backend for storing creations.

Since it might still be used for future research, the app hasn't been released publicly yet, however, was exhibited at the Media Informatics Open Days and enjoyed great popularity. Furthermore, the project was awarded a perfect grade by the supervisor Nađa Terzimehić.

If you want to learn more about the project, download the full report here:

Intuedo is a friendly online German course for Italian and English-speaking people from around the world.

The Vocab app, which I designed and developed over a few months as a working student, is a mobile companion that helps users study their vocabulary on the go. Users can pick their own schedule to study at their preferred pace and progress their words through different levels of knowledge. The app makes sure to present repetitions in an optimal way to foster long-term memory.

Technologies

The Intuedo platform uses a wide array of technologies in its stack.

• WordPress for account, member, and progress management
• Firebase cloud functions for interacting with the WordPress backend
• OAuth to authenticate users in the app
• Google WaveNet API for generating pronunciation audio
• Firebase Cloud Storage for storing and providing these audio files
• Firebase Cloud Firestore for storing app user data and course vocabulary
• Angular for the admin frontend, where the teachers can manage course vocabulary
• Flutter for the Vocab App

Prometheus was created by myself and two teammates for the master's course "Open Games Workshop" at LMU Munich.

In the game, one player controls Prometheus, who is trying to take the gift of fire down the Olympos from the gods to the humans. The other player is trying their best to stop that from happening by using the powers of different gods to either kill Prometheus directly or destroy the environment around him. Prometheus isn't wholly defenseless however since the power of the fire gives him the ability to air-dash to avoid the attacks thrown at him by the gods.

Even though, the time limit didn't allow for more than one level to be designed, this makes for a fun and engaging interplay between the two players. The project was developed in Unity, and all graphics, effects, and 3D Models were custom-built.

The project was awarded with a perfect grade by the course organizers.

As part of the Online Multimedia course at LMU Munich, two teammates and I designed and developed a full online meme platform over the course of one semester, using a NestJS backend for all social features, meme rendering and authentication, and an Angular frontend including a custom-built meme editor.

Features

Memester included a wide array of features, some of which are listed here:

• Custom WYSIWYG meme editor including templates from ImgFlip, custom templates, webcam photos and more.
• Text editing and repositioning using drag and drop
• Authentication
• Full REST API to interact with the backend
• Posting memes to a meme feed with social features (likes, comments, sharing...)
• Open memes from the feed to remix them (remixed memes remember their history)
• The backend generates a video slideshow from the most popular memes daily.

The project received a perfect grade at the end of the course.

You can check out the source code on GitHub