The Quality Index boasts over 60,000 reviews from websites like 148Apps, Pocket Gamer, and Tapscape, and uses a unique metric to create a single definitive score for each iPhone title.
Whilst Full Fat's Flick Golf! spent the first half of April at the summit of the App Store leaderboards, its stablemate Coin Drop! has topped Quality Index's equally prestigious chart for the month.
Its 60 levels of Pachinko-inspired puzzling proved sufficient to relegate two fabulous iPad-to-iPhone conversions Superbrothers: Sword & Sworcery EP Micro and World of Goo to silver and bronze positions.
With echoes of the Barclays Premier League title race, a late critical surge shot Flick Kick Chelsea up our monthly league table, but it was too little too late to lift the crown.
Qis Top 10 iPhone games of April 2011
| Pos. | Game | Qi rating | Reviews |
| 1. | Coin Drop! | 9.6 | 5 |
| 2. | Sword & Sworcery EP Micro | 9.5 | 3 |
| 3. | World of Goo | 9.2 | 6 |
| 4. | Snuggle Truck | 9.0 | 3 |
| 5. | Flick Kick Chelsea | 8.9 | 3 |
| 6. | Gears | 8.8 | 4 |
| 7. | Woozzle | 8.7 | 4 |
| 8. | Air Penguin | 8.5 | 8 |
| 9. | Burn it All | 8.5 | 5 |
| 10. | You Don't Know Jack | 8.3 | 7 |
N.B. While we only display the average score to one decimal place, the list is generated to further significant figures. We just don't show them all.
And, naturally, this is a static graph based on live listings which are subject to constant change as new releases and reviews emerge.
In order to provide a regular marker of the critical zeitgeist, however, we will continue to round up the best of the iPhone games released each month to provide the definitive Quality Index top ten.
Quality Index
