Why this exists

I built EAB Annual for my personal use after taking the MOSAIC Light-Sport Repairman Inspection (LSRI) course, and realizing it's going to be a tedious process inspecting my RV-9A. I would need to research regulatory requirements, go through a 100+ step checklist, track discrepancies, review airworthiness directives and service bulletins, track which parts and tools I need to order, and make sure nothing is missed before signing-off. I needed a way to stay organized and document the process for future reference. The idea for the app was simply to enforce a phased, workflow based approach to the annual, and keep a clean maintenance historical record.

This could be done using spreadsheets, or even a pen and paper, but managing scattered files or handwritten notes is not my strongest skill. I wrote this web app to stop asking myself "Did I forget something?". It turned into a full-blown software development effort - 20,000+ lines of code - the project would have been unaffordable just a year or two ago, without code assist. If you look carefully, you might notice a few AI slips in the text or menus, but I've tried to human check everything as much as possible. I've used the best coding models that exist today for the build (Anthropic Opus).

It works at the hangar (as long as there is internet or mobile connectivity)

The app renders correctly on a desktop and on a phone (responsive design), which matters more than it sounds. I can work through the checklist on the iPhone under the airplane, then check again at a computer afterward to review and print. Changes sync across devices within about a second, so the phone in the hangar and another device or PC somewhere else are always looking at the same inspection (the screen shows a live view of the inspection without reloading). All data is stored in the cloud using the most modern (as of May 2026) technology "stack".

Open to others

It seemed to me, and I could be wrong, that this app would be useful to others in the experimental and light-sport community, so I opened it up. It is in a "shipped", production state now, but I'm still actively working on it. Some features are still being refined, but the core functionality is there and should be working well. I have a list of features and improvements that I want to add, but I also welcome suggestions from users.

The paid tiers exist to help cover development tools subscriptions, hosting, and the storage costs of the photo and records features. They can encourage future development, new ideas and improvements. However, the free plan is fully functional for a typical EAB owner with one or two airplanes. My hope is that after the first inspection, if you find this application useful, you would consider supporting the project via the paid plan, which I try to keep at nominal cost. You can see the details on the pricing page.

Feedback is welcome

If you try it and something is broken, confusing, or missing, I'd be happy to hear about it. Please don't hesitate to reach out with any feedback, questions, or suggestion - the best way is to Log in and use the Suggest button in the help menu.