Timo Partl

I build apps.

About Me

I was born in Southern Germany and studied Applied Computer Science (Bachelor) at the University of Applied Sciences in Constance. I then moved to Stuttgart and studied in Computer Science & Media (Master) at the Stuttgart Media University. While having various interests in different areas of Computer Science, my biggest passion is developing consumer apps.


The most functional diary for Windows, macOS, iOS & Android lets you keep all your precious memories in one place and even reminds you to write down your experiences every day.

  • Windows Developer Award 2017 finalist
  • The most feature-rich diary app for Windows, macOS, iOS & Android, incl. Cloud Sync
  • Daily notifications remind you to write down your memories
  • Attach pictures, videos, audio, tags, people, ratings or locations
  • Create templates & insert them with 2 clicks
  • Full integration into system calendar
  • Automatic integration of your social media activity (Twitter, Instagram, Facebook, …) and your fitness activity (Google Fit, Fitbit, Strava, …)
  • Optional password protection of your diary
  • Backup your diary with importing & exporting the database
  • Export your diary entries as Word file (.docx), webpage (.html) or plain text (.txt)


Easily track your work hours - organize, analyze and export them. Perfect for freelancer, hourly workers, employees or anyone else who wants to keep track of his or her working time.

  • Cross-platform app, available for PC (Windows / macOS) & smartphone (iOS / Android) incl. Cloud Sync
  • Start/pause/stop your working time without opening the app - via tiles, notifications, voice commands, geofence & NFC tags
  • Assign tasks or tags to work units
  • Data export as Excel or CSV file
  • Auto-start/stop when arriving/leaving the work place
  • Integrates into system calendar & "Diarium" diary app
  • Special tags allow adjustments of the worked time and earnings
  • Filter work units by tag and task
  • Analyse working time and earnings via graphs
  • Calendar integration both ways: see your appointments in-app and see your work units in the system calendar
  • Be productive with the Pomodoro technique - WorkingHours reminds you when you finish a work session


You are interested in the magic internet money or even own some yourself? Then this might be the perfect app for you! Keep track of all the most important cryptocurrencies and monitor your own portfolio.

  • Keep track of all the most important cryptocurrencies (data comes from coinpaprika)
  • Monitor your portfolio/blockfolio automatically by adding your exchange wallets, wallet addresses or manually entering your coin balances
  • Display your wallet values and percentage changes in your preferred currency (incl. BTC)
  • Supports Binance, Bitfinex, Bittrex, Coinbase, Coinbase Pro, HitBTC, Poloniex, Huobi, OKEx, Bitstamp, Crypto.com & many more!
  • Read the latest news about the space and get notified about price changes via notifications
  • Supports all popular cryprocurrencies - Bitcoin, Ripple, Litecoin, Stellar, Dogecoin & many more!
  • Live charts from TradingView
  • 🚀


Ever wondered where you took all your great photos? Or want to know where one specific photo was shot? No problem with GeoPhoto!

  • View all your photos and videos on the world map
  • Supports many file formats (JPG, HEIC, RAW, MP4 & more)
  • Show your pictures and their recording locations in a great slideshow
  • Add geotags to your photos and edit existing ones
  • Automatic grouping of pictures
  • Cloud support (view your OneDrive-pics on the map)
  • View additional picture info based on EXIF tags


SubTotal is a tool for small business owners to quickly create PDF invoices. From wherever you are, with just a few clicks.

  • Cross-platform app, available for PC (Windows / macOS) & smartphone (iOS / Android) incl. Cloud Sync
  • Quickly create PDF invoices & send them to your clients
  • Create invoices from your WorkingHours data with just one click
  • Keep track of the invoices and mark them as paid once you get paid
  • Personalize your PDF invoices with your company logo & color


Ever wanted to know the exact current time to celebrate someone's birthday or New Year's Eve? Or to synchronize clocks? AtomicClock provides exact times based on NTP servers which are getting their time directly from atomic clocks!