Tempo was an artificial intelligence-enhanced calendar application for iOS. Developed by Tempo AI, a spinoff of SRI International, the application was reviewed by numerous blogs and media outlets, including Wired, VentureBeat, TechCrunch, and others. Raj Singh, Thierry Donneau-Golencer and Corey Hulen are the Co-Founders of Tempo AI, Inc. 
Using data (from social media, calendars, emails, contacts, location, etc.) stored on a user's iPhone or iPod touch, Tempo compiled information related to any given event and displayed it when requested, hence making the application context-aware.
The application was launched on February 13, 2013, and a reservation system was implemented on February 18, 2013, in order to handle high demand of over 100,000 signups. The day the reservation system was launched, nearly 73% of the ratings Tempo received in the App Store were one-star, the lowest possible. Previously, the application had received mainly five-star ratings.
- Bonnington, Christina. "Tempo Makes Your Calendar a Whole Lot Smarter | Gadget Lab". Wired.com. Retrieved 2013-02-20.
- "Tempo AI comes up with a smart calendar that keeps you on time and organized". VentureBeat. Retrieved 2013-02-20.
- Wednesday, February 13th, 2013 (2013-02-13). "Incubated By Siri Birthplace SRI, Tempo Launches A Calendar App With The Info You Need For Any Meeting". TechCrunch. Retrieved 2013-02-20.CS1 maint: multiple names: authors list (link)
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- Tempo for iPhone uses AI to fold maps, contacts, and files into your calendar. The Verge (2013-02-13). Retrieved on 2013-07-30.
- "ASALESFORCE ACQUIRES SMART CALENDAR STARTUP TEMPO AI". Digital Trends. 2015-05-31. Retrieved 2015-05-31.
- "Siri's Cousin 'Tempo Smart Calendar' Uses iPhone Data to Provide Enhanced Calendar Experience". Mac Rumors. 2013-02-13. Retrieved 2013-02-20.
- "SRI International Spin-Off Tempo AI Announces Smart Mobile Calendar | Tempo AI — Tempo Smart Calendar". Tempo AI. 2013-02-13. Retrieved 2013-02-20.
- Raj. "Tempo Reservations Are Now Live! | Tempo AI — Tempo Smart Calendar". Tempo AI. Retrieved 2013-02-20.
- "Want Tempo's new calendar assistant? You'll have to wait for its AI to catch up — Tech News and Analysis". Gigaom.com. 2013-02-15. Retrieved 2013-02-20.
- "Tempo Smart Calendar for iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPod touch (3rd generation), iPod touch (4th generation), iPod touch (5th generation) and iPad on the iTunes App Store". Itunes.apple.com. 2013-02-14. Retrieved 2013-02-20.
- "Salesforce acquires "smart" calendar app Tempo, which is shutting down". Fortune. 2015-05-29. Retrieved 2015-07-14.
- "Salesforce Acquires Smart Calendar Startup Tempo, App Will Shut Down On June 30 – TechCrunch". techcrunch.com. Retrieved 2018-06-18.