Hello, Planks! app for iPhone and iPad

"Hello, planks!" is a planking challenge and tracker.

This started as a New Years resolution: to build up a bit of strength and see how far I could take this.
Then, it became an engineering challenge: to build a new iOS app, to try out several frameworks, etc. and here it is: "Hello, planks!"

At its core, this is a stopwatch. A stopwatch that does not switch the screen off after 30 seconds (the first version did that! -- not helpful). It also keeps track of the times you have recorded, with some motivational statistics.

The app contains a big, round start/stop button in the middle and a list of previous planks. The longer the bars, the better. Longer than average planks are highlighted darker, so you want the longer and darker buttons at the top.

Thats it.
So far.

On the roadmap next:
- Be able to delete unwanted (shorter?) planks
- a community to follow and give kudos to other people
- and other exercises, e.g. wall sits

Anything else?