Check this out, I asked the spark team about their future plans for their software, they replied within minutes saying this.
"Hi Jake,
Thanks for your comments about Spark.
We are planning on re-writing Spark from the ground up next year. Improvement to the charting tools are on the todo lists. The main reason for the re-write is to provide cross platform/device support - ie work on Android/Iphone/Ipad etc
It is a big project and not likely to be completed until mid 2015 at the earliest. In the meantime we are only maintaining Spark in its current form and not making any major enhancements.
Regards
(The guy who wrote me back - I'll keep him anonymous)
"
It won't be for a while but it's good to hear from the team.
