iPhone vs Android (Photo credit: nrkbeta)

According to the latest data from mobile analytics firm Flurry, the average app price has fallen significantly over the past four years while the number of free and ad-supported titles is growing all the time.

The research, published on Thursday shows that rather than charging a premium, over the past four years app developers have constantly lowered the prices of their titles to the point where many are eventually offered for free or with advertising.

In 2010, 84 percent of apps across the two major smartphone platforms were free or used advertising to support costs, and despite a small wobble in 2012 when the number briefly dropped to 80 percent, as of April this year, 90 percent of all apps are now free.

However, that means that 10 percent of all apps are not free and of that group, iPad-optimized titles are the most costly — average price $0.50, followed by iPhone/iPod Touch apps (average price $0.19) with Android apps — average price — $0.06 — the cheapest.

Read More Smartphone apps are getting cheaper: study – NY Daily News.