Every side hustle starts simple enough. A handful of freelance clients. Occasional consulting gigs. Weekend photography sessions. A small but growing Etsy store. Many creators juggle several of these at once.
It doesn’t take long for the admin chaos to kick in.
You log billable hours in one app. Store business receipts in your camera roll. Track loose expenses in a random notes file. Forget to record mileage entirely. Client work gets scattered across emails, calendar entries, and quick jotted reminders. Come month-end, figuring out your actual working hours, revenue, and profit turns into a tedious, time-consuming project of its own.
Basic stopwatch timers can’t fix this mess. Anyone billing hourly or wanting clear visibility into their side business needs more structure. The best side hustle tools automate routine tracking, sort expenses by category, tie every task to specific clients and projects, and generate clean reports without constant manual updates.
This guide only features actively updated apps available on iOS and Android. I focused exclusively on platforms built to handle the full scope of side hustle management: precise time tracking, billable hour oversight, expense sorting, project-based reporting, mobile-friendly workflows, smart automation, and in-depth data breakdowns.
Every tool was graded on pricing fairness and real-world usability for freelancers, independent contractors, creators, consultants, and self-employed professionals.
Availability: iPhone, Android
Pricing: Fully functional free plan; paid Starter plans start at ~$9 per user monthly, Premium at ~$18 per user monthly.
Toggl Track remains the gold standard for self-employed workers who need precise, granular time-tracking and professional-grade reporting. Its greatest strength is pure flexibility.
You can tag every block of work to a specific client, project, individual task, billable category, team member, or custom label. This level of segmentation lets you split overlapping side hustle streams cleanly, so you always know exactly where your hours go and which work drives revenue.
The platform auto-generates detailed breakdown reports for hours worked and revenue-earning activities. Upgraded plans unlock custom billable rates, profitability analytics, scheduled recurring reports, custom fields, and exportable PDF documents. Seamless cross-device syncing keeps tracking consistent whether you’re working from a desktop or logging time on your phone while out and about.
Industry-leading billable hour tracking accuracy
Powerful, fully customizable reporting engine
Surprisingly robust features on the free tier
Reliable cross-device syncing
Clean, structured project and client organization
Expense tracking functionality is very basic
Advanced reporting tools sit behind paywalls
Occasional sync glitches reported by long-term users
Freelancers and consultants who rely on detailed billable-hour logs for client invoicing and profitability tracking.
Availability: iPhone, Android
Pricing: Generous free plan with full core functionality; premium subscriptions unlock advanced tools
Clockify has built a huge loyal user base for one simple reason: it packs professional-level time-tracking features into a free tier that never pressures users to upgrade. No strict project caps, no hidden basic-feature locks, no abrupt limitations.
Users log billable hours, assign work to dedicated projects, organize client profiles, categorize work types, generate official timesheets, and export shareable reports effortlessly. Its project-focused structure shines brightest for side hustlers juggling multiple clients simultaneously. You can separate hours by client, service type, or ongoing project to see exactly how you allocate your working time each month.
Its reporting suite isn’t quite as polished or detailed as Toggl’s, but it’s more than enough to support most independent workers’ daily tracking and invoicing needs.
Extremely capable free plan with unlimited projects
Streamlined client and project organization
Intuitive mobile interface for on-the-go tracking
Fast, beginner-friendly onboarding process
Interface feels dated compared to modern competitors
Advanced analytics require a paid upgrade
Expense tracking tools are minimal and basic
Side hustlers who want robust, reliable time tracking without mandatory subscription costs.
Availability: iPhone, Android
Pricing: Free limited version; premium subscription unlocks full automation and financial tools
Hurdlr takes a completely different approach than traditional time trackers. Instead of focusing solely on hours worked, it builds a full financial snapshot of your side business by merging time tracking, expense management, and tax preparation tools into one platform.
It monitors incoming income streams, sorts and logs business expenses, auto-tracks driving mileage for work trips, and generates real-time tax estimates. Its automation is its biggest selling point. The app automatically categorizes transactions, logs mileage in the background, and syncs connected financial accounts to eliminate manual data entry. Industry reviewers consistently name Hurdlr one of the most well-rounded tools for gig workers and freelance operators.
For side hustlers who care equally about tracking billable hours and controlling business expenses, Hurdlr delivers a far more holistic view than standalone time-tracking apps.
Smart automatic expense categorization
Hands-free background mileage tracking
Comprehensive financial and tax reporting
Purpose-built exclusively for freelancers and gig workers
Unified all-in-one business tracking system
Time-tracking depth lags behind dedicated tools like Toggl
Full functionality requires a premium subscription
Custom reporting options are somewhat restricted
Gig workers and multi-income freelancers who want unified time and expense tracking in one app.
Availability: iPhone, Android
Pricing: Subscription-only access
QuickBooks Solopreneur caters specifically to self-employed users who need organized business records without the complexity of full small-business accounting software. It prioritizes financial clarity above all else.
The app excels at sorting business expenses, scanning and saving receipts, logging all incoming income, compiling structured business reports, and tracking work-related mileage. Its automatic transaction categorization cuts down hours of manual bookkeeping every month. Simply connect your financial accounts, and the app sorts personal and business transactions automatically.
Where it falls short is flexible billable expense management. Users looking for advanced workflows to mark expenses as billable to clients will need to upgrade to higher-tier QuickBooks products. Even so, it remains one of the most trusted tools for side hustlers focused on cleaning up messy business finances.
Industry-leading expense management tools
Accurate, automated receipt scanning and logging
Reliable financial reporting for solo businesses
Backed by the trusted QuickBooks accounting ecosystem
Polished, user-friendly mobile experience
No free tier available
Limited flexibility for complex billable expense workflows
Built for accounting first, time tracking second
Side hustlers whose top priority is organized expenses, clean books, and accurate financial reporting.
Availability: iPhone, Android
Pricing: Free core plan available; paid subscriptions unlock advanced automation
TimeCamp is the most automation-focused tool in this lineup. Instead of forcing you to start and stop timers manually all day, it passively tracks your activity and auto-assigns work to projects based on your custom rules.
It combines automatic time logging, billable hour calculations, project budget tracking, basic client invoicing, productivity analytics, and integrations for expense tracking. Reviewers consistently highlight its standout automation features, which drastically reduce repetitive admin work for busy side hustlers managing multiple concurrent projects.
The upfront setup takes a little time to fine-tune, but once configured, it eliminates nearly all manual time-tracking busywork.
Best-in-class automatic time-tracking automation
Precise billable hour monitoring
Detailed project and productivity reporting
Built-in invoicing tools streamline client payments
Minimizes repetitive manual data entry
Requires initial setup and rule configuration
Dense interface can feel cluttered for new users
Premium automation features require a paid plan
Side hustlers who want to automate as much of their tracking and admin work as possible.
Toggl Track stands as the best overall choice for side hustlers needing detailed, reliable tracking for billable hours, segmented project work, and professional reporting. Its precise client tracking, customizable billable rates, deep analytics, clean project segmentation, and seamless mobile access make it perfect for anyone juggling multiple income streams.
That said, it’s not the ideal fit for every workflow. Users focused purely on expense sorting and financial organization will get more value from Hurdlr or QuickBooks Solopreneur.
Best Overall for Billable Hour Tracking: Toggl Track
Best Free Side Hustle Tracking App: Clockify
Best for Automated Expense Categorization: Hurdlr
Best Accounting-Focused Solution: QuickBooks Solopreneur
Best Time-Tracking Automation: TimeCamp
Great side hustle tools don’t just count minutes. They build clear, organized business records. They show exactly how you spend your working time, which projects turn a profit, where your money goes in expenses, and what your side business truly earns long-term. For any independent creator, freelancer, or gig worker, that level of clarity turns chaotic scattered notes into structured, usable business data.