Draw Something dropping down top-grossing App Store charts

Zynga Poker is this week's top earning iOS game, with Draw Something dropping sharply down to fifth place behind fresher faces.

Draw Something earns revenue both from sales of the premium, ad-free version and from in-game currency for new colours and items, and as such, is maintaining a slight lead on the ridiculously popular Angry Birds Space.

Perennial favourite Bejeweled is tucked in at the bottom of the iPhone list, but it's interesting to note how many gambling games are found on both charts.

See the full charts below, thanks to Gamasutra. Note that these charts track gross revenue, not sales.

Top-grossing iPhone titles
1. Poker by Zynga (Zynga, Free)
2. DragonVale (Backflip Studios, Free)
3. Kingdoms of Camelot: Battle for the North (Kabam, Free)
4. Slotomania (Playtika, Free)
5. Draw Something (OMGPOP, $0.99)
6. Angry Birds Space (Rovio, $0.99)
7. Design This Home (App Minis, $0.99)
8. Texas Poker (Kamagames, Free)
9. Bejeweled Blitz (PopCap, Free)
10. Deer Hunter Reloaded (Glu, Free)

Top-grossing iPad titles
1. Slotomania HD (Playtika, Free)
2. DragonVale (Backflip Studios, Free)
3. Kingdoms of Camelot: Battle for the North (Kabam, Free)
4. Kingdom Age (Funzio, Free)
5. Poker by Zynga (Zynga, Free)
6. Slotomania (Playtika, Free)
7. Angry Birds Space HD (Rovio, $2.99)
8. Modern War (Funzio, Free)
9. Bejeweled Blitz (PopCap, Free)
10. Texas Poker (Kamagames, Free)