Keel vs Square Invoices: Payment Rails or No Account at All?

Short answer: Square Invoices is free to send and earns its keep when a client pays by card, dropping the funds into your Square balance alongside your in-person takings. Keel is an iPhone app with no account, no cloud, and no processor tie — it puts your own payment link on the invoice as a QR code, for a one-time price. Choose Square if collecting card payments is the actual job. Choose Keel if you already get paid another way and want the records to stay on your phone.

Most people comparing these two are asking a narrower question than they think: do I want my invoicing tool to also be my cash register? Square answers yes and builds everything around that. Keel answers no. Neither hedges, which is why the comparison is unusually clean.

Before shortlisting software, make sure the document itself is right — what to include on an invoice applies no matter which app prints it. And if your real worry is storage rather than payments, on-device vs cloud bookkeeping covers the question sitting under this whole category.

What does Square Invoices actually do?

Square Invoices is the billing arm of the Square payments ecosystem. You build an invoice from a template, add your logo, and send it by email or text. The client opens a hosted page and pays by card without creating an account of their own. The money lands in your Square balance and transfers to your bank on Square’s schedule.

The feature set is deeper than the free label suggests. Square sends estimates a client can accept online, and an accepted estimate becomes an invoice — automatic conversion sits on a paid plan, but doing it yourself is free. Recurring invoices on a daily, weekly, monthly, or yearly schedule are free too. Milestone payment schedules, which stage a job into several payments by percentage or fixed amount, require a paid plan. There are iOS and Android apps plus a browser dashboard. Square’s Invoices pricing page sets out which features fall on which tier.

The strategic point is the ecosystem. If you also take payments in person through Square, the invoice you sent last Tuesday and the card you tapped this morning sit in the same reporting, under one login. That consolidation is the product.

Is Square Invoices really free?

Free to send, yes. Free overall, no — and that distinction is the business model rather than a gotcha.

Square charges no monthly fee for basic invoicing. It takes a percentage plus a fixed amount from each card payment, at a separate lower rate for ACH bank transfers. There is also a paid tier, Invoices Plus, though it is worth being precise about what that buys: it adds features and caps the fee on a bank transfer rather than lowering the card rate. Rates and tiers change, so read Square’s own pricing page before you commit.

The practical implication: if your clients pay by check, cash, or a transfer you arranged yourself, Square costs you nothing and also does very little for you. If they pay by card, Square takes a cut of every job. Whether that is expensive depends on your ticket size and margin.

Where is Square Invoices genuinely better?

At getting money out of a client and into your account, it is not close.

Payment collection is the whole point, and it works. The client taps a link, enters a card, done — no phone call, no “I’ll drop a check by.” Square tracks paid and unpaid status, chases with automatic reminders, and reconciles the deposit. Keel puts a QR code on the PDF that opens whatever payment link you supply, and then Keel is out of the loop. It does not know if the client paid. You mark it yourself. For anyone who has spent a fortnight chasing a client for payment, that gap is real money.

Estimates that convert. Square quotes the job, the client accepts it online, and the accepted estimate becomes an invoice — automatically on a paid plan, in a couple of taps on the free one. Keel does not do estimates at all yet. For a trade where every job starts with a written quote, that single line decides the comparison before anything else is considered.

One ledger with your in-person sales. If you already run a Square reader at a counter or in a van, adding Square Invoices means one set of numbers instead of two. Keel cannot merge with a card terminal, and pretending otherwise would not help anyone.

Recurring billing, Android, and a desktop browser are Square wins too, as are milestone payment schedules on its paid tier. Keel has none of them.

Where is Keel better?

On independence from a payment company, and on what that buys you.

Keel is an iPhone app that runs entirely on the device. There is no account, no login, no cloud, and no bank connection. Its App Store privacy label reads “Data Not Collected.” Square is a regulated payments business, so using it properly means an account, identity verification, and a linked bank account for payouts — reasonable requirements for a company moving money, and exactly the requirements some people are trying to avoid. Keel never asks, because Keel never touches your money.

That independence has a working consequence: you are not locked to one processor’s rate card. Put whatever payment link you like behind the QR code and change it next year without rebuilding your invoicing. Your billing tool and your merchant account stop being the same decision.

Keel is also wider than an invoicing app. Alongside PDF invoices with custom numbering, your logo, and a brand color, it reads photographed receipts on-device using Apple Intelligence, keeps a mileage log, shows a Freeboard view of the business, produces reports, and exports the year as an Accountant Pack. The ledger underneath is append-only and hash-chained, so entries are added rather than quietly rewritten. And because nothing needs a network call, an invoice can be written and rendered in a basement with no signal.

Pricing is a different shape. Keel Free is $0 with unlimited invoices, receipts, and mileage. Keel Pro is a one-time $249.99 Lifetime purchase, not a subscription and not a cut of your revenue.

How do Keel and Square Invoices compare side by side?

	Square Invoices	Keel
Core model	Free invoicing, revenue from processing	Software you buy once
Where data lives	Square’s cloud	Your iPhone only
Account required	Yes, with verification	No
Card payments	Built in, status tracked	Your own link as a QR code
Payment status	Automatic	You mark it
Estimates	Yes; client accepts online, auto-convert on a paid plan	Not yet (in development)
Recurring invoices	Yes	No
Milestone schedules	Paid plan	No
Receipts	Within the Square ecosystem	Read on-device via Apple Intelligence
Mileage log	No	Yes
Platforms	iOS, Android, web	iPhone only
Works offline	Limited	Fully
Cost shape	Per transaction, plus optional subscription	Free; Pro $249.99 one-time

Check Square’s current pricing before deciding. Processing rates and tier contents move.

What can Keel not do?

Stated plainly, because none of it is arriving next week.

Keel does not create estimates or quotes — in development, not shipping today. Keel does not import from a bank feed, so nothing appears in your books on its own. Keel does not file your taxes; it produces the figures and the export, and you or your preparer file. Keel does not manage a team, crews, or dispatch. And Keel has no web interface — no desktop, no Android, no browser login.

Keel also does not process payments, which in this comparison is the load-bearing limitation. If two or more of those are dealbreakers, Square is your answer and you can stop here.

Who is Square Invoices right for?

The operator whose main problem is collection, not record-keeping.

Picture a mobile detailer, a small caterer, or a repair shop already taking cards in person. Clients expect to pay by card, and chasing checks costs more in unpaid weeks than processing fees cost in percentage points. This person wants the invoice, the terminal, and the deposit under one login, and they are right to want that.

Square is also correct if your jobs start with a quote the client must approve, if you bill on a repeating schedule, if you need milestone payments on a long project, if you work from a laptop, or if you carry an Android phone. Keel does none of those. Among free-tier invoicing tools, Keel vs Wave and Keel vs Invoice Simple cover the neighbors if Square’s ecosystem is more than you need.

Who is Keel right for?

The one-person business that already has payment sorted and wants the paperwork to stop being someone else’s asset.

A consultant paid by bank transfer. A tradesperson whose regulars pay by check or e-transfer. A photographer who invoices six times a month and does not want a percentage skimmed off each one. For these people, integrated card processing is not a missing feature — it is a fee they were happily avoiding.

It is also right if you object to the account itself. Some will not hand identity documents and a bank link to another platform on principle; others have a client contract or professional obligation making third-party storage awkward. The cost is stated honestly: nothing imports itself, nothing reconciles itself, and an expense you do not capture is not in the books. If a monthly software bill rather than privacy is your real complaint, alternatives to QuickBooks Solopreneur address that angle directly.

If that sounds like your setup, Keel is on the App Store: Keel — Invoice Maker & Receipts. The free tier is not a trial, so you can send real invoices before deciding whether Pro is worth it.

Frequently asked questions

Can Keel accept card payments like Square Invoices?

Not itself. Keel places a payment link on the invoice as a QR code, and the client pays through whichever processor that link points to. The money never touches Keel, which is why Keel needs no account or verification. The trade-off is that Keel cannot tell you the invoice was paid — you mark it settled when the funds arrive.

Is Square Invoices actually free?

Free to send, yes, with no monthly fee on the basic tier. Square earns a per-transaction cut when a client pays by card, at a lower rate for ACH transfers, and sells a paid Invoices Plus tier that adds features and caps the bank-transfer fee rather than lowering the card rate. If your clients pay by check, you pay nothing. If they pay by card, you pay on every job.

Does Keel do estimates like Square does?

No. Square sends estimates clients accept online, and the accepted estimate becomes an invoice — automatically on a paid plan, manually on the free one. Keel has no estimate feature today, though one is in development. If your work begins with a quote every time, this is the deciding difference and no amount of privacy compensates for it.

Which one is cheaper over a few years?

It depends on how you get paid, not on the sticker. Square costs nothing monthly but takes a share of card revenue, so its cost scales with your billing. Keel is free, with a one-time $249.99 Lifetime upgrade and no cut of anything. High card volume favors a fixed price; low volume with non-card clients means Square is effectively free too.

What happens to my records if I lose my phone?

With Square, you log in from another device and everything is there. With Keel, you have whatever you exported — records are encrypted on the iPhone with no server copy, so there is no account to restore from. That is the price of the privacy model, and it makes exporting the year’s file your job, not the vendor’s.

Can I use Square for payments and Keel for the books?

You can, and some people do: Square handles the card transaction, Keel keeps the ledger, receipts, mileage, and the year-end export. It is a reasonable arrangement if you want processing without giving up on-device records, but you are then reconciling two systems by hand, which is exactly the overhead both products exist to remove.

---

This article is general information. Feature sets and pricing change — check both vendors’ current pages before deciding.