Hi, I like to share my thoughts on corona sdk
1. Comparing with Unity
I think we shouldn't compare corona sdk with unity at all, we should compare with Marmalade, game salad and other 2D engines.
- Unity is 3D engine, If you want to make 3D game, go for Unity. Its is powerful, but very difficult to use, You'll waste a lot of time developing 2D games with Unity.
- Corona is 2D engine, fast&rapid development, and runs smoothly with no loading time on most phones. But it support less platforms. If you want to make 2D game or simple apps, go for Corona or other 2D engines.
2.Starter vs Pro
Its good to have, but not something you cant live without. Personally, I seldom use it.
- Daily Builds and Pre-releases
Good to have. Public release is updated only every 3~ 6 months?
You'll have to pay for most of the plugins. Does Pro user get some free plugins in future?
Probably the main reason to update to Pro.
For now, all you need to decide is whether IAP worth the $600 per year?
From my experience, 500 daily download for a iOS free game earns about 10~40 usd, 200 download earns 3~15 usd, 300 daily download with revmob earns 0~12 usd.
(android market is about 1/3 of iOS earning for the same amount of downloads)
If you are wondering whether IAP can cover the cost, just switch it from paid to free and see how much downloads you are getting after two weeks. 5~50 downloads per day probably earns nothing.
New users: upgrade Pro only if you get more than 1000 downloads per day
I think Starter is great deal. If you have one or two free app/game that each generates more than 500 daily downloads then go ahead and get Pro and try out IAP. If not, stick with Starter and use revmob ads for free game/app.
Current Indie/pro: continue subscription before expires if you make more than 350 usd a year
For indie, don't put too much hope in android market. But if you earn more than 350 usd last year then I think you should continue the pro subscription, because we'll be paying $350 per year instead of $600 usd!
Include Offline Build & some free plugins for Pro users to make the deal more attractive.