Yo (app)

Developer(s)| Or Arbel
Initial release| April 1, 2014; 12 years ago (2014-04-01)
Stable release|

iOS

2.5.8 (October 7, 2016; 9 years ago (2016-10-07)[1])

Android
1.6.1 (December 19, 2015; 10 years ago (2015-12-19)[2]) [±]
Operating system| iOS, Android, Windows Phone
Website| justyo.co

Yo is a social mobile application for iOS, Android, and Windows Phone. Initially, the application's only function was to send the user's friends the word "yo" as a text and audio notification,[3] but it has since been updated to enable users to attach links and location to their "Yo"s.[4][5]

## Contents

* 1 History
* 2 Reception
* 3 Similar apps
* 4 References
* 5 External links

## History

Yo was created by Israeli developer Or Arbel in eight hours, being launched on April Fools' Day 2014 for Android and iOS. Originally chief technology officer of stock trading platform Stox, Arbel quit his job and has since begun working on the app full-time. The app has received USD$1 million in investment from a group of investors led by Moshe Hogeg, CEO of Mobli, who had originally asked Arbel to design a single-button app to call his assistant.[6] In July 2014 the app was also released for Windows Phone.[7] The app was valued at between $5 and $10 million in July 2014 and received a further $1.5 million in funding.[8] Website IFTTT included Yo as an option for their service in July 2014.[7]

Arbel stated interest in expanding the app to include more functionality, including a possible feature which could be used by bloggers to send their followers a 'yo' with a link to the blog attached whenever they post an update; the feature has since been implemented.[9] The app's first content update was released in August 2014, adding extra functionality to it, including the ability to send web links and hashtags, and creating user profiles.[10]

On 20 June 2014, Isaiah Turner hacked the app, allowing him to retrieve any user's phone number and spam/spoof 'Yo's to any user.[11] After the exploit was fixed, Arbel hired him to work for the company.[12]

In October 2014, the app introduced functionality to enable users to send their location to other users by simply double tapping their username.[5]

In June 2015, Yo released the second version of their app with a number of new features. The user interface was updated to allow users to send photos or their location within 1 swipe and a tap from the home screen. The new version also enabled users to collect their friends in to groups so that they could "Yo" a number of people with 1 tap.

## Reception

Since its release, Yo has been downloaded over 3 million times and over 100 million 'Yo's were sent.[8][13][14] Joachim Fels, an economist at Morgan Stanley, expressed interest in the app due to its simplicity.[15] The app reached number 3 in the iOS App Store, but has since fluctuated in ranking.[16]

## Similar apps

A number of apps inspired by Yo have been released, including one which sends the word 'Hodor', and an Indian-made app which sends the word 'aiyo'.[16][17][18] The app has also been adapted to warn Israeli citizens of missile strikes.[19] An app called Lo was partly inspired by Yo, sending only a user's location.[20] In July 2014 some of the copies and parodies received copyright complaints from Yo, with Or Arbel saying "Yo has spawned many clones... some of them are a complete replication of the Yo app... Improving upon our concept is welcomed, copying us bit-by-bit isn’t."[21]

## References

1. ↑ "Apple on the App Store". 2016-10-07. https://itunes.apple.com/us/app/yo./id834335592?mt=8.
2. ↑ "Yo". 2015-12-19. https://play.google.com/store/apps/details?id=com.justyo.
3. ↑ Bereznak, Alyssa (19 June 2014). "Developers Have Hit a Yo Point with This Terrible New App". Yahoo! Tech. https://www.yahoo.com/tech/developers-have-hit-a-yo-point-with-this-terrible-new-89277145724.html. Retrieved 23 June 2014.
4. ↑ Fiegerman, Seth. "Yo App Now Does Much More Than Let You Say 'Yo'". http://mashable.com/2014/08/12/yo-app-update/. Retrieved 16 October 2016.
5. ↑ 5.0 5.1 "Simple messaging app Yo adds location sharing for context". https://venturebeat.com/2014/10/07/simple-messaging-app-yo-adds-location-sharing-for-context/. Retrieved 16 October 2016.
6. ↑ "Money for nothing? $1mn for app that says 'Yo' to your friends". 19 June 2014. http://rt.com/news/167092-two-tap-app-yo/. Retrieved 23 June 2014.
7. ↑ 7.0 7.1 Dredge, Stuart (2 July 2014). "Yo app expands to Windows Phone and gets more useful with IFTTT channel". https://www.theguardian.com/technology/2014/jul/02/yo-app-windows-phone-iftt. Retrieved 2 July 2014.
8. ↑ 8.0 8.1 Shontell, Alyson (18 July 2014). "An App That Just Says 'Yo' Has Raised $1.5 Million At A $5–10 Million Valuation". Business Insider. http://www.businessinsider.com/yo-raises-15-million-at-a-5-10-million-valuation-2014-7. Retrieved 20 July 2014.
9. ↑ Starr, Michelle (19 June 2014). "The million-dollar app that exists to say "Yo"". http://www.cnet.com/news/the-million-dollar-app-that-exists-to-say-yo/. Retrieved 23 June 2014.
10. ↑ Lomas, Natasha (12 August 2014). "Yo, The One-Word Messaging App, Updates So It’s Not Quite So Absurdly Simple Anymore". TechCrunch. https://techcrunch.com/2014/08/12/yo-grows-up/. Retrieved 23 August 2014.
11. ↑ Claman, Liz (24 June 2014). "Yo CEO hires hacker". Fox Business. http://video.foxbusiness.com/v/3640127394001/. Retrieved 20 May 2017.
12. ↑ Hern, Alex (2 July 2014). "Yo founder apologises for hack – and hires one of his hackers". https://www.theguardian.com/technology/2014/jun/23/yo-founder-hack-hires-hackers-chat-app. Retrieved 2 July 2014.
13. ↑ Fiegerman, Seth. "Yo App Users Have Sent More Than 100 Million Yos". http://mashable.com/2014/09/05/yo-100-million/. Retrieved 16 October 2016.
14. ↑ Aglionby, John (24 June 2014). "Yo app passes 1m downloads". http://www.ft.com/cms/s/0/5fc1915e-fad2-11e3-8959-00144feab7de.html#axzz35XegaY00. Retrieved 24 June 2014.
15. ↑ Weisenthal, Joe (23 June 2014). "We Officially Have Our First Wall Street Economist Talking About The 'Yo' App". http://www.businessinsider.com/joachim-fels-on-yo-2014-6. Retrieved 23 June 2014.
16. ↑ 16.0 16.1 Tweedie, Steven (28 June 2014). "The Rise, Falter, And Future Of Yo". http://www.businessinsider.com/the-rise-falter-and-future-of-yo-2014-6. Retrieved 2 July 2014.
17. ↑ Larson, Jared (1 July 2014). "The Yo, Hodor App Provides a New Outlet for Your Inner Hodor". http://www.ign.com/articles/2014/07/02/the-yo-hodor-app-provides-a-new-outlet-for-your-inner-hodor. Retrieved 2 July 2014.
18. ↑ Madhok, Diksha (25 June 2014). "India has a fitting response to Yo, the dumbest app ever". http://qz.com/226357/india-comes-up-with-a-fitting-response-to-yo-aiyo/. Retrieved 2 July 2014.
19. ↑ "Yo app warns Israeli citizens of missile strikes". BBC News. 10 July 2014. https://www.bbc.com/news/technology-28247504.
20. ↑ Cosco, Joey (20 August 2014). "Someone Made An App Like Yo, But It Shares Your Location Instead". http://www.businessinsider.com/app-called-lo-yo-base-forty-2014-8. Retrieved 23 August 2014.
21. ↑ Perez, Sarah (31 July 2014). "Yo Is Trying To Get Parody App YOLO & Others Pulled From The App Store". TechCrunch. https://techcrunch.com/2014/07/31/yo-is-trying-to-get-parody-app-yolo-pulled-from-the-app-store/. Retrieved 23 August 2014.

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