Custom Mac Tools — gTrigonakis

Custom tools  ·  Mac & iOS

Stop doing it by hand.

Tell me the repetitive task that eats your week. I'll build a small, reliable app that does it in one click — made for your exact workflow, and supported after delivery.

Free first consultation · Fixed quote before any work starts

Since 2011
Shipping apps on the Mac App Store
Full-time
Independent Mac developer since 2014
One person
You talk directly to the developer, start to finish
Mass Rename, a Mac app by gTrigonakis, previewing sequential file renames

Mass Rename — one of my own Mac apps. Your tool gets the same care.

What I build

Small tools. Big time savings.

Not a giant software project — a focused app that removes one painful, repetitive job from your day.

A Mac app processing ten thousand files at once

File automation

Thousands of files, handled in seconds.

Rename, sort, convert, or organize files the way your business needs — by client, date, project code, or anything inside the file. What takes an afternoon today becomes a single click.

Built to stay fast with tens of thousands of files.
Your own naming rules and folder structure, exactly.
A Mac app reading document contents with on-device AI

Documents & data

Get the data out of your PDFs.

Invoices, receipts, contracts, policies — pull the numbers and names you need straight into Excel or your own system, instead of retyping them. On-device AI can read the content for you.

Export to Excel, CSV, or straight into your workflow.
Can run fully on your Mac — client data never leaves the office.
Live preview of changes before they are applied

Built properly

A real app — not a fragile script.

A native, signed Mac app with a clear interface anyone in your office can use. Preview changes before they happen, undo mistakes, and keep working when macOS updates.

Same quality standards as my App Store apps.
Ongoing support available, so it never gets abandoned.

Ideas

If you do it every week, it can be automated.

A few examples of tools I can build. If your task isn't here, just describe it.

PDF to spreadsheet
Extract totals, dates and names from invoices or statements into Excel.
File organizer
Sort scans and downloads into the right client folders automatically.
Simple office CRM
Customers, policies, renewals and reminders — only the fields you use.
Text & data cleanup
Merge, split, reformat, and de-duplicate lists and exports.
Photo & media batches
Resize, watermark, rename, or export metadata for whole libraries.
iPhone companion
A simple iOS app for your team in the field, synced with the office.

Not sure it's possible? Ask — the answer is usually yes, and the first conversation is free.

How it works

Clear steps. No surprises.

01
Describe the task
Tell me what you do manually today and how often. A few sentences is enough.
02
Get a fixed quote
I reply with what the tool will do, a fixed price, and a delivery date.
03
Try it early
You test a working version on your own files and tell me what to adjust.
04
Use it for years
You get the finished, signed app — with optional updates and support.

Pricing

Fixed prices, agreed up front.

Every project gets its own quote. These starting points help you know what to expect.

Utility
Small tool
from€249

One focused job, done well — a file, text, or photo automation.

Native, signed Mac app
One round of adjustments
30 days of fixes included
Peace of mind
Care plan
from€25/month

Keep your tool working and improving as your needs and macOS change.

Updates for new macOS versions
Priority email support
Small changes each month

Prices exclude VAT where applicable. Source code available as an option.

Questions

Good to know

No. Describe the task in your own words — ideally with an example file. I handle everything technical and deliver an app that's simple to use.

Small tools usually take one to two weeks. Business tools typically take three to six weeks. You'll get an exact date with your quote.

Tools can run entirely on your own Mac, including AI features, so your client files never need to be uploaded anywhere. Sample files you share with me are used only for building your tool.

You get a signed app licensed for use in your business. If you need the full source code, that's available as an option in the quote.

Yes. Everything works remotely by email and video call, in English or Greek.

Free first consultation

What would you automate first?

Send a short description of the task. You'll get an honest answer — and a fixed quote — within two working days.

English & Greek · Mac & iOS