Picture messaging service Snapchat's rival Slingshot has been updated. Users can now react to reactions as well.

Facebook launched its instant messaging software app for sharing pictures and videos in June this year, which is currently available on iOS and Android devices internationally. On July 31, Facebook updated the app for both iOS and Android and says on its blog "you can reply to any reaction with a photo, video or text."

"We've also improved ways to find people you know who are on Slingshot. With the introduction of My People, now you can see everyone you're slinging with in one place at any time. We've made finding Facebook friends and phone contacts who are also using the app more reliable," per a Sling blog.

Slingshot is considered slightly different than its rivals as the app requires active participation by its users. If a friend sends something then the receiver has to reciprocate by sending something back.

"Shoot a photo or video of what you're up to and sling it to a bunch of friends. They won't be able to see your shot until they sling something to you. Tap on a shot to react, or simply swipe it away," reads the product description of Slingshot on Apple App store.

It seems that the latest update bring in changes after getting valuable feedback from the users as it also thanks users who gave feedback regarding improvements to the app.

The update also brings some bug fixes and tweaks to offer a smooth experience to users. Even though the app has been rolled out internationally, it is available only in English. The popularity of the app may get Facebook to launch the app in other languages such as German, Japanese, Malay, Spanish and more.

Snapchat was launched under the name Picaboo in July 2011, but changed its name in Sept. 2011. The app received high popularity and currently millions of photos and videos are being shared via the app on a daily basis. Facebook made an offer to acquire Snapchat for $3.2 billion but the founders rejected the offer. The rejection may have tempted Facebook even more to start its own instant photo and video sharing app.

Slingshot is available from Apple App store and Google Play store as a free download. For iOS, the app can run on iOS 7.0 or above. The app is compatible with iPhone, iPad and iPod Touch.

Android users who have Android 4.1 Jelly Bean or above can also download the app on to their devices.