CX-3 Flight Computer

I am teaching PPL ground school. I recommend to all my students the physical ASA CX-3 for the FAA knowledge tests. This app allows me to demonstrate the functions on my iPad, if needed projected to a bigger screen. I find myself even using it at home, when again I cannot remember where I put my physical CX-3. Sure, ASA has the Web demo app, however, it is beneficial to have an app independent of WiFi or cellular access. Well worth a small fee.

I think they’ve fixed the calculation issues with W/B because I haven’t experienced them.

I use this for my students while their calculator is on order.

I use this tool everyday, what’s great is it also works offline unlike the website. If you in aviation school I would definitely recommend buying this app. I only deducted a star because some users say the calculations to be inaccurate but I believe they fixed those issues but I have also never experienced those problems, the app works well for me and I think it will for you too.

The website simulator is free, and doesn’t provide wrong numbers :( I had high hopes for this app, as it could’ve been more convenient than going to the website, but having a calculator that doesn’t work is disappointing. Had the same issues as the other review. Until it’s fixed, don’t buy.

The CX3 is a good calculator. The web emulator is decent, but this app has some bugs that provide inaccurate calculations. I’ve found a few in the Weight/Balance section and fuel calculation section. An example, the app defaults AvGas to 13lbs instead of 6. I’ve not found a place where I can correct it, so all fuel calculations are wrong. A second example: when calculating the W/B, the total CG just adds the stations together instead of following the formula of CG=M/W. I’m sure there are others. Don’t trust it! It can work as an emulator to practice while you wait (a long time) for your actual CX3 to arrive, but it should not be used in real-life aviation. Also, I have to fully close the app and relaunch it a few time before it will work. I often just get a white screen on load. I’m going to request a refund from Apple. For me, it had proven untrustworthy.