Checked the rules and saw some similar posts for software so I figure I'm good here! If not, sorry mods, please feel free to delete or PM or whatever. I don't make any profit off the app so I don't gain anything from this thread bar helping people out.
I've been working on Frame Assistant Tool for about 5 months now, and I released it for free on Android a month ago. The response has been amazing, and I recently also released on iOS too.
My Frame-Data is dynamically loaded with JS into tables, which means a tiny footprint and very speedy loading. It also means that you can filter out moves by type. I update it whenever someone points out inconsistencies and it also includes data from the unannounced change list present in this forum.
My Notes taking section isn't a simple notepad. Each character's data is kept completely separate from the other, for example data you enter in the Akuma > Ryu match will NOT show up in the Ryu > Akuma match.
On top of all that, FAT has a punish calculator, frame-trap calculator and link calculator.
On top of all that, the entire thing is free. You can donate via the IAP if you want, but I don't really mind. Please let me know what you think!