Why I built NinerLog.
I’ll be honest with you: NinerLog is not built by a team or a company. It’s built by me — a single person. I’m a husband, a father, a software engineer, and a GA pilot since 2018. NinerLog is open source because I want your ideas, your contributions, and your feedback. Together we can turn a solo project into a community.
Like most pilots, I’m busy and forgetful. Over the years I’ve used many logbook apps and EFBs. Some of them are genuinely great — probably better than NinerLog in many ways. But every time I switched between tools, the same problem hit me: migration is painful.
Vendor lock-in is real. Moving your flight data between platforms takes hours of cleanup, reformatting, and hoping nothing gets lost. Your logbook is a legal record of your entire flying career, and it shouldn’t be trapped inside someone else’s business model.
So I built the logbook I wanted: a single, independent place to keep everything — forever. No lock-in, no subscriptions, no surprises. Open source under the AGPL-3.0 and MIT licenses, so you can always see exactly what the software does and take your data with you.
NinerLog is my solution to my own problem. If it helps you too, that makes it even more worthwhile.