Say The Same Thing, a new iOS word game from digital–friendly indie band OK Go, was the 50 billionth app downloaded on the App Store, Apple has revealed. Ohio’s Brandon Ashmore helped the App Store to pass the milestone when he downloaded the game earlier this week, winning a $10,000 App Store gift card in the process. There has been considerable excitement over the 50bn milestone and the news should boost downloads of Say The Same Thing, which gets users to choose random words, then guess the connections between them, in a Words With Friends-esque fashion.

King has revealed that its games are attracting 21bn gameplays a month across all platforms, as it announced the launch of Pet Rescue Saga on mobile. Pet Rescue Saga, which has more than 6m daily average users on Facebook, will be available on iOS and Android “early this summer”. In doing so, it follows in the footsteps of King’s hit mobile title Candy Crush Saga, which is currently seeing more than 500m million gameplays a day on mobile alone. To celebrate the launch, King released some new user figures: it now has 70m DAUs (up from 66m in April) in total, with its games clocking up 21bn gameplays a month across mobile, social and online.

The App Store hit its 50 billionth download yesterday, with half of that coming over the last 14 and a half months. The App Store launched in July 2008, hitting 25bn downloads in early March 2012, which suggests a rate of around 50m downloads a day since then. In Apple’s fiscal Q2 2013 results, released last month, Apple said it had paid out $9bn to iOS developers to date (at a time when total apps downloaded was past 45bn), up from $8bn announced in mid February.

Runtastic’s range of health and fitness apps have now passed 30m downloads, with the company claiming 25m mobile users and 10m registered users on Runtastic.com. The news comes as the company announces a deal with workout music provider Power Music, to create “scientifically-engineered music compilations” that take advantage of Runtastic’s in-app music player. The first Runtastic Workout Mix is available now via download stores. The company has also launched a range of hardware for monitoring fitness, working in conjunction with its apps, including the Runtastic Bluetooth Smart Combo Heart Rate Monitor and the Runtastic Speed and Cadence Sensor.

Now here’s a thing: the developer of popular freemium mobile game Puzzle & Dragons is now worth more than Nintendo.

Well, that’s what their respective market caps indicate. Japanese games consultant Dr Serkan Toto has published a blog post pointing to GungHo’s latest share-price growth, taking it to a market cap of 1.54 trillion Yen ($15.1bn) – ahead of Nintendo’s $15bn.

Puzzle & Dragons generated $113m of revenues for GungHo in April alone – $3.76m a day. GungHo is thus making even more money from mobile games than Finnish firm Supercell, which said in April that it was making $2.4m a day.

US broadcasting giant Clear Channel says its iHeartRadio streaming radio service now has 30m registered users, which it claims puts the service “second only to Instagram as the fastest-growing digital service in Internet history”.
Users only have to register if they want to use iHeartRadio’s ‘Custom Stations’ – Pandora-style personalised channels – so its true reach is higher. Clear Channel says it has 60m monthly unique users across all platforms, with its mobile app having been downloaded 175m times so far.

Fruit Ninja has now passed 500m downloads, with more than 120m of them coming from China, according to Halfbrick CMO Phil Larsen. Larsen, who was speaking at the Global Mobile Internet Conference in Beijing, also revealed (via The Next Web) that Jetpack Joyride has amassed more than 150m downloads, of which China accounts for at least 30%.

US personal radio service Slacker Radio has been growing fast since its relaunch in February this year.

The company announced yesterday that it has added more than 6m new listeners in the last three months, with 100k of them signing up to paid subscriptions. 3.5m of those new listeners are on mobile devices.

Compare these stats to Slacker’s published stats of 4m active users and 500k paying subscribers in mid-February, and you’d have to judge the relaunch a success so far, especially as Slacker CEO Jim Cady claims the company is “gross margin positive on every listener – whether they’re ad-supported or a paid subscriber”.

One of the few music discovery apps to have got any meaningful traction in the past couple of years is SoundTracking.

SoundTracking announced a new milestone yesterday: 2m monthly active users on mobile, who are creating more than 1.75m “daily social actions” within the iOS and Android apps.

Social actions? That’s views, plays, likes, loves, comments, shares and follows (i.e. not the most meaningful of statistics in the scheme of things, even if it sounds impressive).