I like it. I do refer to the yellow book, but this is a helpful aide memoir to browse when at home.
Needs an advanced section. A ludicrously expensive app which contains almost nothing. What's in it can be written on a postcard. More detail needed. Eg lead of turn followed by a revoke. Which do you correct first? Also scoring. ..when to give an average score. Looks like a good beginning. I've kept it only hoping that the developer will bring it up to a much better level.
Easy to use Ideal app for someone who directs at club events. The main problems are covered eg revokes, bids out of turn, playing out of turn etc. and options are clearly shown.
Looks useful Looks like a good way of sorting out problems at the table
Updated to the 2017 World Bridge Federation laws