How it works Features Pricing FAQ

Back to work USEONEAPP

Stop running your business from five browser tabs. UseOneApp is a clean workspace. Quotes, projects, invoices, and expenses in one place. It connects your whole agenda, leaving you time for actual work and things that matter.

Free forever for 1 project. Decide later.
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You work alone. Why use five different apps?

You write quotes in Word. You keep tasks in your head or a notebook. You forward files via mobile. Receipts pile up in your wallet. You have a separate program for invoices. Switching between tools and admin costs you hours — instead of doing the work you enjoy.

There is a better way. And it's much simpler.

Flow through your entire working day

From the customer's first message to the final payment on your account — in one environment, on mobile, tablet, and desktop.

End the inbox chaos

Connect your email and tame the chaos into a clear to-do list. AI summarizes long threads into one sentence, so you instantly know what matters. Turn customer requests into project tasks without copy-pasting. Nothing gets lost.

Manage projects clearly

Every project has a task board, price list, photo gallery, and file manager. Document your work in three phases — before, during, and after. Push completed tasks straight into an invoice with one click. No manual re-typing.

Impress your customers

Give each client a private space to track progress, view the photo gallery, download files, and leave notes. You look as professional as a large agency, even though you work alone. One-on-one communication, just the essentials.

Quote and invoice in 60 seconds

Describe the work — AI generates the quote items for you. Review and send the PDF quote, convert it to an invoice when approved. Payment is easy via QR code, and your accountant has the data ready.

Receipts — photographed, read by AI, done

Snap a photo of the receipt. AI automatically reads the supplier, amount, and date. All expenses are sorted by category, exportable as CSV, and receipts are archived in a ZIP, stress-free. Tax returns stop being a nightmare.

Privacy is strictly yours

Unlike big platforms where everyone shares one database, here your data lives in a private, isolated workspace. No one else can see your records or files — not even us.

Designed for independent pros.

AI as your sidekick

In the Max plan, AI is fully included even if you aren't tech-savvy — no setup, it just works instantly. It summarizes emails, generates quotes, reads receipts. In the Pro plan, you bring your own key and pay the AI provider directly (typically fractions of a cent) - ideal for technical users. No hidden markups either way.

The app speaks your language

Your workspace works in 27 languages. Work fully in your native language. Designed primarily for Europe — works everywhere.

English  •  Deutsch  •  Español  •  Français  •  Polski  •  Italiano  •  Português  •  Nederlands  •  Čeština  •  Dansk  •  Suomi  •  Magyar  •  Bahasa Indonesia  •  Bahasa Melayu  •  Norsk  •  Română  •  Kiswahili  •  Svenska  •  Tagalog  •  Türkçe  •  Tiếng Việt  •  Slovenčina  •  Hrvatski  •  Slovenščina  •  Eesti  •  Lietuvių  •  Latviešu  •  Українська  •  English  •  Deutsch  •  Español  •  Français  •  Polski  •  Italiano  •  Português  •  Nederlands  •  Čeština  •  Dansk  •  Suomi  •  Magyar  •  Bahasa Indonesia  •  Bahasa Melayu  •  Norsk  •  Română  •  Kiswahili  •  Svenska  •  Tagalog  •  Türkçe  •  Tiếng Việt  •  Slovenčina  •  Hrvatski  •  Slovenščina  •  Eesti  •  Lietuvių  •  Latviešu  •  Українська  • 

Start free. Upgrade when you want or when you grow.

No commitment and no time pressure. No hidden traps in the free plan.

Try First
Starter
$0
forever
So you have a chance to test everything properly.
  • 1 active project
  • Unlimited invoices & expenses
  • Unlimited clients & quotes
  • Client portal file sharing
  • 100 MB file storage
Popular
Pro
$79
/ year
Your own choice of AI service.
  • Unlimited projects & invoices
  • Unlimited quotes & expenses
  • AI assistant - emails to tasks
  • AI client acquisition tool
  • Completed tasks straight to invoice
  • 2 GB secure storage
  • Personal setup from the founder
  • Receipt extraction from photos
  • Quote generation from descriptions
Simplest
Max
$129
/ year
+ We handle the AI 100%.
  • Everything in Pro
  • Use without any setup
  • Priority support
  • Ready from the very first minute

Just for comparison: invoicing alone costs hundreds a year. UseOneApp replaces 5 tools.

Frequently Asked Questions

What does the free plan actually include?

One full project with tasks, a price list, a gallery, and a file manager. Unlimited invoices, clients, and quotes, plus the client portal. 100 MB of storage. No time limit, no credit card. It's enough to handle one job from start to finish and make sure the app fits you. When your work takes off, you just switch to a higher plan.

What does "bring your own AI key" mean in the Pro plan?

In the Pro plan, you connect your own API key from OpenAI, Anthropic, Gemini, or Perplexity. You pay the AI provider directly — these queries typically cost fractions of a cent. We don't add any margin. In the Max plan, AI is fully included and you don't have to set up anything at all.

Is my data truly private and safe?

Absolutely. Unlike big platforms where everyone shares a single database, your data is stored in a private, isolated architecture on your own subdomain. We don't look into your invoices or customer files — not even if we wanted to.

You need a specific feature. Can you request it?

I'm an independent developer building tools for people like us. If your request fits the philosophy of simplicity, write to me — I read every message. If the idea makes sense and helps others, we'll add it. Most of the best features came from user feedback. The community sets the direction.

Pavel - Founder

I just wanted to get things done.

Hi, I'm Pavel. Like most freelancers, I was drowning in browser tabs and chaotic workflows — quotes in Word, projects in Dropbox, invoices in Excel (sent only when time was pressing and I had no choice), Trello for tasks, expenses in a pile of papers. More energy went into managing the chaos than the actual work.

So I built a tool I desperately needed, one that took this burden off me. And now freelancers, consultants, tradespeople, and independent professionals all over Europe use it every day.

UseOneApp is a clear, minimalist workspace that connects your entire working day. No corporate bloat. No extra payments to use important features. Just a single tool designed around how independent people actually work.

Built with ❤️ for those who work for themselves.

Are you ready to finally clear your desk?