You can read below of my disappointment with the initial release of this app. But its very responsive developer took the comments to heart and has released a very much improved version, working "as advertised," with no crashing, and one that Im enjoying much more. The graphics are now crisp and clear, making for a much more pleasing visual experience.
While this this not a toy, and requires a good understanding of FMS programming, and ATC and IFR navigation and procedures, it is not meant for actual in-flight navigation. It is a compliment to your very safe desktop flight simulator and a route planning tool. However, for the most accurate play it is important that you update its database, and your aircrafts database, with the latest Navigraph cycle.
I had no problem with the X-Plane plugin, but this versions one short-coming (my reason for only 4 stars) is the lack of true integration: the simulator give visual feedback to iFMS, but programming the iFMS has no bearing on the simulator (the more expensive AirTrack app allows you to control the simulator from the app, though does not have the feel of a true FMS, like iFMS does).
Bottom line: I recommend this app for the serious flight-simmer who is using aircraft with serious FMSs (JRollons CRJ200, JAR Designs A320neo, and VMAXs Boeing 777) above and beyond the out-of-the-box versions.
(Below is my original review)
[UPDATE: the developer has been extremely responsive and is working on taking care of these issues as quickly as possible. Im encouraged that this will be much better very soon. Standby ]
As a pilot and serious flight-simmer I was excited to see this application announced on one of my favorite blogs. The price seemed steep, but if it did all that I thought it would do, I was willing to forgo the $12.95. An unfortunate choice indeed. The buyers remorse started immediately.
My first major disappointment was when it first loaded and I saw the screen for the first time. The graphics are terrible: course, pixelated, with poor text, textures, and lighting. It was hard to get in a full route without it crashing a some point in the process. And when I did get a route in, the waypoints were not exactly what you might see [delete: nothing like you see] on published charts, simroutes.com, flightaware.com. [delete: Some were downright bizarre.]
[UPDATE: when it wasnt crashing, I was able to spend more time establishing routes, and had better success matching establish routes, but not sure how consistent it is with all routes.]
How this app made it into the App Store, Ill never understand. So, save your money and your frustration and avoid iFMS for now.