From the Skritter team via iOS app testing mail:
Finalized our pricing: $9.99 for 1 month, plus an app launch sale offering
$39.99 for 6 months, $69.99 for 12 months, or $119.99 for 24 months.
Sounds good! To make it clear, this includes everything, so the iOS app is for free itself but you'll need an active account to add words and lists etc, just as on the website.
Hope I'm not talking ahead of the team but the pricing was a hot issue for some.