I have probably used north of 20 mindmap packages across various operating systems in recent years. They all have their strengths and weaknesses and none are perfect.
My ultimate choice was to use Mindomo. It does everything I need it to and works well across all platforms that I use.
Here is why I chose it:
My choice for the ipad filtered down to 3 packages
- iMindMap by Tony Buzan
Mindjet (Mindmanager now branded just as Mindjet)
iMindMap by Tony Buzan
Uses colour well
The mindmaps can sometimes look too tactile and do not plug into formal documents well.
Online version is fast
Ipad version is fast
Works offline on Ipad
Syncs with cloud version easily
It lacks some features of the others and can be a little bossy about layout but none of these are large issues at all.