But with millions of apps to choose from, how can you be sure you and your employees are empowered with the right tools?
The case is simple to state: can you be sure that Junior Andrews was sat in the front passenger seat of that car at the time a fatal shot was fired?
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Tell your story first, so that you can be sure you have one.
And if that happens, you can be sure that you will be able to read all about it on BBC School Report!
If you do your part now by giving as generously as you can, you may be sure that we will do ours, to the lasting benefit of this generation and those to come.
We'll be on the ground at Computex next week, so you can be sure that we'll give you the full rundown on Windows 8's opening salvo.
But if it is down to Corgi engineers to check your fire or boiler is safe can you really be sure that they do any better?
And we will not be satisfied -- you can be sure -- if only one or two or three of them pass -- because all of them should pass.
"The prosecution say that Mr Cowan fits that profile perfectly, and the prosecution say that you can be sure - all 12 of you, beyond reasonable doubt - that Mr Cowan was the gunman, " he said.
Whatever their failures, you can be sure of one thing: however exemplary you think your child-rearing has been, many of your acquaintances will be convinced you are somehow to blame.
But just as developers can use Android to build fresh apps for your smartphone, you can be sure that Google will allow developers to tinker with its glasses.
Send money to these people and you can be sure that only a small portion will be frittered away soliciting you for more, and the bulk of what's left will be invested in a single-minded drive to find a definitive cure for juvenile diabetes.
There may be only one bank branch convenient without reliable transportation, and you can be sure that if a bank believes its customers have few alternatives, it will take advantage of its customers in as many ways possible.
You may not see this but you can be sure the public feels it and will receive your work in the same lackluster spirit you created it in.
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Even with the best-laid plans, you can never be sure what is going to happen on the day, and if there are any issues, you'd better have plans for that, too.
But you are sure - as sure as you can be sitting here - that Egypt will see a properly democratic, openly elected civilian government taking over by the end of the year say?
And you can be sure that competitors, with similar designs, will appear soon after.
"You can be sure Richard Kinder isn't doing anything like this at Kinder Morgan, " says one.
Whatever your motive, you can be sure brands are listening and watching your every social move.
You can be sure we will go to London with the same attacking spirit.
But you can be sure that a negative one will not be taken as reason for despair.
By carefully tracking your spending, you can be sure never to dip below your comfort zone.
But if so, you can be sure that it will be with something other than 3D gimmicks.
You can be sure Intel will be eager to give Apple an early peek at the results.
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You can be sure that every executive at IBM took notice, especially the ones with below average performance.
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Jewelry in the Space Age, looked human but you can never be sure with an event like this.
You can be sure that he does not take the strength of the nationalist vote at face value.
So you can be sure the President will be pushing Congress and working with Congress to get that done.
You can be sure that venture investors are being extra careful about who they back with their new funds.
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