Buying Omnifocus 3 is considerable good idea now

I’m very new Omni product family.

I’ve tried Omnifocus 3 and quite happy witht that, I also heard Omnifocus 4 is on roadmap. and beta is available now.

Is it worth to buy version 3 now. Should I wait for 4. Or will be there any disucount or can transfer to 4?

Purchase OF3 on your iPad or iPhone to get OF4 for iPhone and ipad for free.

No word yet on OF4 for Mac.