How to print from iphone 5 to canon MX860 what app is needed?

Some more options to print from iphone and iPad to Canon Printer:

• Using any third-party software is another way to print easily from iPhone and iPad. Printopia, while other options include handyPrint and Printer Pro, is the most common and widely used alternative.
• These printing applications provide you with command over how and what to print from your iPad or iPhone computer. For cases where AirPrint is not enabled on your printer, the functionality is accessible.
• Printers have your registered email address that is usually saved during product registration and you can print using this email address without using an AirPrint compatible printer once the setup has been completed.
One last way to print is through Bluetooth from iPad to Canon Printer. You can use this feature for mobile printing. Check the user manual of the printer to see if it is Bluetooth compliant.
Print from iPhone to Canon Printer

If the printer is a wifi or blue tooth printer, you should not need any apps. Just make sure your phone and printer are connected via wifi or blue tooth and it should print whichever document you need printed.