Precision time tracking
Start a timer from the menu bar, log work against the right client, and add manual entries when you need to clean up retroactive time.
The ultimate macOS workspace for UK freelance developers.
Track billable hours, generate professional PDF invoices, and estimate Income Tax and Class 4 National Insurance without jumping between timer apps, spreadsheets, and invoice tools.
Built for freelance software engineers, programmers, and independent consultants on macOS.
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Core workspace
Track time. Generate invoices. Master your UK taxes.
Devlog keeps the business side of freelancing in one fast Mac interface.
Flexible billing models
Handle hourly retainers, day rates, fixed-fee projects, and milestone billing without reshaping your client workflow around one rigid invoice format.
Multi-client architecture
Keep jobs, rates, invoices, and payment details separated by client so you always know what is billed and what is still open.
Professional PDF invoices
Create clean invoices with custom line items, VAT support when applicable, business details, bank details, and export-ready PDFs.
Expense tracking
Log business expenses and see how they affect taxable profit before the end of the tax year.
One app for the admin you used to spread across three.
Devlog is built for the way independent software contractors actually work: multiple clients, changing rates, unpaid work in progress, tax reserves, and invoice-ready billable history.
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UK tax dashboard
Stop guessing your tax bill. Start knowing your safe to spend.
Devlog follows the UK tax year from 6 April to 5 April and estimates Income Tax plus Class 4 National Insurance from your freelance profit.
Freelance software developer tax calculator UK
Calculate Class 4 National Insurance on Mac
Freelance developer profit after tax calculator
Revenue tracked£48,000
Allowable expenses£6,400
Estimated tax reserve£9,820
Safe to spend£31,780
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The Devlog flow
From first client to paid invoice.
01
Add your business details
Save your name, email, address, bank details, and invoice preferences once.
02
Create clients and rates
Set default hourly rates, project fees, and client-specific billing details.
03
Track, review, and invoice
Log work, mark jobs as billed or unbilled, preview the invoice, and export the PDF.
Native macOS invoicing for developers.
Download Devlog from the Apple Store and keep clients, time, invoices, expenses, and UK tax estimates together.
✓ Time tracking for independent software consultants
✓ Professional PDF invoice generator
✓ UK contractor tax estimator
✓ Multiple clients, project rates, and expenses
Download from Apple Store