Voyager Open Software is dedicated to creating useful tools. We currently offer two iOS apps:  Birdathon, an app for birders to record bird observations and manage bird checklists, and Mood-Log, an app for helping you keep track of your emotional state.

Chronicle all your birding adventures


Birdathon is a tool for recording your bird observations, creating and organizing your bird checklists, and sharing your checklists with others. It is designed to be used in the field to efficiently record birds as you observe them. You can quickly record whether a bird is seen or heard and the number observed. The time and location of each observation is automatically recorded. You can add field notes to each observation.


Get in touch with your emotions


Mood-Log is an app designed to help you keep track of your emotions as they change throughout the day and from day to day. You do this by creating new Mood-Log entries, recording any emotions you are currently experiencing and logging other information about yourself. You can use Mood-Log as a journal to keep track of events in your life and watch for connections between your daily life and the emotions you experience. A summary page and charts show you what’s happening over time. You can send email reports from within Mood-Log and you can set reminders that will prompt you to create a Mood-Log entry at different times in the day.

Testimonial from the App Store:

I am a psychotherapist and use this app with my teenage clients and find it to be incredibly helpful. The app generally has a great concept. It’s 2017, so all my clients are on their phones constantly anyway, why not use their phone for something that increases self understanding? I like how you can adjust the amount of feelings to choose from and that there are faces paired with each emotion- it helps build understanding of that feeling within the unsocial. I have them get notifications 3x/day (morning, noon, evening). They are learning to see how moods shift throughout the day, every day, and which times are the easiest/most challenging for them. They are building so much insight and awareness and it’s almost effortless!


Voyager Open Software is a small independent iOS development company in Northern California that designs custom software tools for education, exploration and fun.     

You can contact us at

Legal Text

Apple, the Apple logo, and iPhone are trademarks of Apple Inc., registered in the U.S. and other countries. App Storeis a service mark of Apple Inc., registered in the U.S. and other countries.

Please also read our Privacy Policy