Use cases
OHarness is not only for code. Point it at your inbox, a messy folder, a bank export or a stack of web pages and it does the tedious part — you review the result and make the call.
Forgotten subscriptions, quiet price rises and fees nobody reads. The agent reads the paperwork so you only have to decide what to cancel.
Scan a year of receipts and renewal emails for every recurring charge, including the free trials that quietly turned paid.
Search my Gmail for receipts and renewal notices from the last 12 months. List every recurring subscription with its price, billing cycle and next renewal date, flag duplicates and anything I haven't used, and total what I spend per year.
Drop in a CSV export from your bank or card and let the agent look for the charges worth a second look.
Read statements.csv in this folder. Group my spending by category, highlight bank fees, foreign-transaction fees, duplicate charges and any price that went up versus last month, and suggest three concrete ways to spend less.
Before a bigger purchase or a plan renewal, have the agent check the alternatives in your own browser.
I'm about to renew my phone plan at $45 a month. Check the current plans from the main carriers for similar data, and tell me whether I'd save by switching or by asking for a retention offer.
Collect, rename and total every invoice, receipt and policy — for your accountant, your expense report or your own peace of mind.
Pull every invoice out of your inbox, save the PDFs with consistent names, and keep a running ledger.
Find all invoices and receipts in my Gmail from last month. Save each attachment to ~/Invoices/2026-09/ as vendor_date_amount.pdf, and add a row for each to invoices.csv with vendor, date, amount, currency and tax.
Turn a folder of photos and PDFs into a ready-to-submit expense report, with the totals already checked.
Read every receipt in ./receipts (photos and PDFs). Extract the merchant, date, amount and category, convert everything to EUR, and build an expense report I can submit, noting any receipt that's unreadable or missing a total.
A weekly sweep of the bills and invoices waiting on you, so late fees stop being a surprise.
Every Monday, check my Gmail for unpaid bills and invoices. List what's due in the next 14 days with amount and due date, and mark anything that's already overdue at the top.
Find every warranty, insurance policy and contract buried in your files, and the dates that matter in each.
Go through ~/Documents and my Gmail for warranties, insurance policies, leases and contracts. For each, list what it covers, the provider, the end or renewal date and the notice period, sorted by what expires first.
Summaries instead of skimming, drafts instead of blank replies, and a list of the senders you never read.
One short read each morning instead of fifty notifications.
Every weekday at 8am, read my Gmail from the last 24 hours. Group it into needs a reply, FYI and can ignore, summarise each in one line, and put anything with a deadline at the top.
Find the mailing lists you never open and get the links to leave them in one place.
Look at the last three months of my Gmail. List every newsletter and promotional sender, how many emails each sent and whether I ever opened or replied, and include the unsubscribe link for each.
The emails you keep meaning to answer, with a first draft already written.
Find emails from real people in my Gmail that I haven't replied to in the last two weeks. For each, write a short draft reply in my tone and tell me what information you're missing.
Sorting, renaming, converting and finding what is eating your disk — the agent proposes a plan and moves nothing until you agree.
Years of installers, duplicates and stray PDFs, sorted into folders that make sense.
Look through ~/Downloads. Propose a folder structure, show me which files would go where, list duplicates and old installers I can delete, and wait for my OK before moving anything.
IMG_4821.jpg tells you nothing. Dates, places and what's in the picture do.
Rename every image in ./scans to date_description.jpg using the photo's date and what it shows, sort them into folders by year and month, and keep a CSV mapping old names to new ones.
When the "disk almost full" warning appears, get a clear answer instead of guessing.
My disk is almost full. Find the largest folders and files in my home directory, explain what each one is, and say which are safe to delete, which to archive and which to leave alone.
The five-minute document jobs that somehow take an hour.
Merge the scanned pages in ./application into one PDF in the right order, compress it under 5 MB for the upload form, and also export contract.docx as a PDF.
Plans, comparisons and lists pulled together from your email and the web, so you can decide in minutes.
Flights, hotels and bookings scattered across a dozen emails, turned into one plan.
Find all booking confirmations in my Gmail for my October trip to Lisbon. Build a day-by-day itinerary with times, addresses and confirmation numbers, flag gaps like a night without a hotel, and export it as a calendar file.
Apartments, used cars or schools — the same facts pulled out of every listing so they line up.
Open these six apartment listings. Put rent, deposit, size, floor, commute time to my office and anything mentioned about pets or noise into one table, and rank them for a couple with a dog.
Copying details from page after page into a sheet is exactly the job to hand off.
Go through the exhibitor list on this conference page, open each company's site, and build a spreadsheet with name, website, what they do, location and a public contact email where one is listed.
Moving house, a new baby, a visa application — the agent drafts the list and remembers it.
I'm moving from Berlin to Munich on 1 December. Make a checklist of everything to cancel, transfer and register, ordered by deadline, and remember it so I can tick things off over the next weeks.
Statements and receipts are read on your machine. Files stay in your folders, not in someone else's dashboard.
Reading your inbox, writing files or opening a page goes through permission prompts you control, once or for the session.
It finds, sorts and drafts. Paying, cancelling, sending and deleting stay with you.
Install the desktop app, open a folder, paste a prompt. Have a use case that saved you time or money? Tell us and we'll add it here.