$0 Android + iOS: Runtastic Six Pack Abs Workout PRO (Save $5)

Runtastic Six Pack Abs Workout is offering their PRO version (normally $5) for free by using the unlock code appoftheday.

This is confirmed to work in Australia & UK. The app has over 51,000 5-star reviews.

Enter code "appoftheday" in "Settings/Promotional Code" to unlock PRO features.

iOS: US, NZ.

Go to Settings - Buy full version and it should be upgraded for free to the PRO version.

Whether you’re a nutrition & fitness junkie, a busy stay-at-home mum, or a business traveler who is always on the go - the Runtastic Six Pack app is perfect for you. Lose weight, ditch the belly & get the flat abdominals you’ve always wanted by following our instructional videos & easy-to-use plans - anytime, anywhere.

Via tightarse on OzBargain