Welcome to Qi's weekly round-up of the Top 10 UK paid apps on iPhone.
To the surprise of, well, nobody at all, WhatsApp Messenger sits at the top of the charts this morning.
After all, this all-in-one IM client is no stranger to the top spot, and it would seem that the arrival of iMessage as part of iOS 5 hasn't dented this app's popularity among UK chatterboxes.
Meanwhile, the highly acclaimed puzzler Where's My Water continues its gradual ascension up the leaderboard, climbing from 8th position last week to 6th place today.
This charming title from Disney has you helping a hygiene-conscious alligator source clean water for his shower.
Yes, it's as odd as that sounds.
Finally, creeping into 10th spot this week is the Sleep Cycle alarm clock.
As mentioned previously, this particular piece of software is designed to have you bouncing out of bed with a spring in your step by waking you during your lightest sleep phase.
"But, how does it know?" we pretend to hear you ask.
Well, you simply place your iPhone in the corner of your mattress, tucked in snugly beneath your sheets, and the phone’s sensitive accelerometer is used to analyse your sleeping movements.
Will Where's My Water continue its steady rise up the chart over the following seven evenings, and can WhatsApp Messenger be toppled?
Tune in next Friday to find out.
The official Top 10 UK Paid Apps chart (13 January 2012) is looking as follows: