No one believes having a side hustle will be easy. It's hard work. But you can make earning that extra income a little easier with the help of a few freelance-friendly apps. Here are six that can help you make the most of your bonus gig. (You're welcome in advance.)

1. Spent: Now that you're working a side hustle, you've got valid business expenses coming from your checking account—in addition to your recent shopping sprees. So how do you separate your personal purchases from those that you can expense on a tax return? Check out Spent, an app that allows you to separate purchases by swipe into personal and business categories. The app will also save images of your receipts, which you will need should you ever be audited. And bonus: Spent offers cash back on purchases through its various partners, such as Wal-Mart and Amazon. Spent, free, available on iOS and Android.

2. Everlance: Every 1,000 miles you drive for your side hustle is worth up to $535 in tax write-offs. Let that sink in, then download Everlance, which uses GPS to track and log the miles you drive so you don't have to be a slave to your odometer. Then you'll go into the app and mark whether those miles were for business or pleasure. Everlance, $7.99 a month, available on iOS and Android.

3. Timyo: A side hustle is, by definition, done on the side. Every second you have to devote to it is precious, but if you're buried under emails, that time will slip away before you know it. With Timyo you'll know which emails need your attention now and which ones can wait. In the app, you scan your emails and set reminders for when you'd like to respond, and it sends you an alert if a response is overdue. Plus, Timyo integrates with every possible inbox—from Gmail to Yahoo to Outlook—putting all your emails in one easily accessible place. Timyo, free, available on iOS and Android.

4. Bullit: When you break out on your own, you might not want to ask your boss for a recommendation. But positive reviews of your personality, skills, and talents could make or break the success of your side hustle. That's where Bullit comes in. The iOS app allows you to collect anonymous reviews from coworkers and employees, either by soliciting the feedback yourself or allowing others to post to your profile. And we haven't even gotten to the best part: If someone leaves a review you don't like, you can delete it and no one will ever see it, Bullit promises. Bullit, free, available on iOS.

5. Shapr: While working solo on a side hustle can be a welcome reprieve from difficult coworkers, it can also get lonely. So if you'd like to chat or even meet with like-minded pros, consider downloading Shapr. The app allows you to select your interests—such as tech, marketing, crafts—and then curates a daily list of nearby professionals who share your interests. When you see someone you'd like to meet, you can message the pro and set up a time to take the conversation offline. Shapr, free, available on iOS and Android.

6. Shake: There's a chance that you'll have to draft legally binding documents—contracts, agreements, and the like—in your side hustle. And if you've got no clue where to start, Shake can help. The app will ask you a few key questions to narrow down the terms of the documents, then draft them for you. You can send and sign the docs in the app too. Shake, free, available on iOS and Android.