Need to divvy up that dinner bill between five people or track expenses on a weeklong business trip?
Sure, you can pop open the calculator app that comes with your smartphone to do the math. You can even jot down those amounts in your notepad app to remind you what you’re owed in case your cash-strapped friends are only packing plastic.
But if you want to skip all of that and let technology do the work, you could pick up a dedicated program that divides up the bill and adds in the tip with just a few taps.
We’re talking about check-splitting apps, which range from the supremely simple to the more calculatingly complex. Translation: There’s something for everyone out there—like these five standouts.
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Tip N Split Calculator

The name of this free app for Android and iOS perfectly describes its function: It adds in the tip on the dinner bill and then splits the total evenly between everyone sharing in the meal.
The Tip N Split Calculator interface is frills-free—just tap in the sum on the check, the tip percentage and the number of people dividing up the total cost. (You can also tap the calculator icon to open a full-screen calc for other minor math chores.)
The one downside? The app doesn’t offer a built-in function for splitting the check unevenly.
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Billr

Unlike some apps that just divide the check evenly, Billr takes into account every item ordered by each person around the table (it can handle up to 16 diners), so individual tabs can be tallied. The $2 app for iOS and iPod Touch devices can also factor group expenses into each person’s total—like that bottle of robust Malbec that everyone enjoyed.
As you tap through the screens, you can add in the amount of tax on the meal, and pick the tip percentage you deem worthy. Once the check has been split, you can pass the phone around the table for each person to cough up the cash—or put the whole meal on your card, and send your pals a customized bill by text or e-mail. Bonus tip: The free Advanced Bill Splitter app offers many of the same functions for Android-based phones.
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Splitwise

The free Splitwise service slices up the dinner bill so everyone pays up properly, but this all-purpose cost-divider can do even more—it also tracks shared household and travel expenses. The uncluttered interface is simple to use, and the app can email receipts to your companions.
Splitwise is more inclusive than other check-splitter tools in another way: Like other apps, it’s available for iOS and Android, but third-party programs like Splittr also bring the service unofficially to Windows Phone users. On the con side, you need an online account to use it, and the service works best when pals also have accounts—which may be more effort than it’s worth if you’re just looking to carve up a bar bill once a month.
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