[jjice]

Echoing others, without knowing your product, I'd lean towards a minimum of $5 and maybe upwards to $20. Targeting professionals makes it easier to sell at the price, and $1 does come off as a "too good to be true" price.

I personally think selling on the App Store makes plenty of sense because it has reduced friction for sales. People already have their credit cards in and can purchase in a single click. Some comments say that you shouldn't have to pay to distribute your software, which is completely fair! But there is real value in the reduced friction. I believe (don't quote me) Apple charges $100 per year and 15% on sales under $1 million in revenue.

Since you don't have to convince strangers to enter their credit card on your site (it's hard to show to a random person that "no, it's all handled by our trust worthy payment processor"), I think that 15% ends up being worth while.

Or, offer it on both and app store and outside of the app store and run some metrics on how sales are on each. Maybe include a discount on your personally hosted on if you'd like. Gumroad is an option here.