For colorists

Hair color formula app and hair color formulation records with booking

The formula you mixed in March is worth more than any marketing you will do this year, because it is the reason she comes back to you. Keep it on her card, next to her visits, and open it from the booking before she sits down.

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Service list

What you charge, and how long it takes

Color consultation, new clients 30m $35
Root touch-up with processing 1h 45m $110
Partial highlights and gloss 2h 30m $210
Full balayage 3h 30m $320
Toner refresh 45m $65

Availability on the booking page is generated from these durations. Sample list.

Short answer

Hairdressers.io is a hair color formula app built into salon booking software. Every client who books gets a card with a color formula field, a free note, the date of her last patch test and the date she signed consent, next to the full history of her visits. The card opens from the booking on your calendar, so the formula is in front of you before you mix. Color services book for their real length with processing time, and it costs $49 a month for one chair or $89 for a salon of up to eight, with 0% commission.

Most colorists keep formulas in three places at once: an index card box at the color bar, the notes app on their own phone and a stand-alone formula app that knows nothing about the appointment. When a client books a root touch-up for Saturday, nobody connects the booking to the formula until she is in the chair and you are scrolling. A formula app that lives inside the booking software closes that gap. The formula, the patch test and the last visit are on the same screen as the appointment, and the person at the desk can read it too.

What is the best hair color formula app for a salon?

The best hair color formula app for a salon keeps each client's formula on the same card as her bookings, so it opens from the appointment instead of from a separate app. It should also record patch test and consent dates, travel with the client list if a colorist leaves, and export to a spreadsheet. Formula calculators are a different tool for a different job.

US colorists mostly use one of three kinds of tool. The table sorts them by what each does, so you can tell which job you are buying for. We compare kinds of product and not prices, because vendors change their plans; check each one on the day you sign.

Kind of tool	What it does	What it does not do	Best for a colorist who
Formula record apps	Store client profiles, formulas and often photos, copy a formula from the last visit	Take bookings, so the formula and the appointment live in two apps	Already has booking sorted and wants a richer formula notebook
Color line calculators from manufacturers	Suggest a formula from the client's current and target level inside one brand's line	Remember your clients or your own adjustments over time	Works mostly in one color line and wants a starting point
Dispensing systems	Weigh and mix color through a machine at the color bar, track usage	Book clients; most need the salon to install hardware	Runs a large color team and wants to control product cost
Full salon suites	Booking, payments, client records with notes, often inventory	Usually price per stylist or per calendar	Wants checkout, stock and records in one login
Hairdressers.io	Booking, a calendar of every stylist, a formula field, patch test and consent dates on each client card	Calculate formulas, store photos or hold cards	Wants the formula opened from the booking on a flat bill

The formula is on the card the booking opens

A stylist updating client records on a laptop after the last appointment of the day

Every client who books, imports or walks in gets a card. On it you keep a color formula in your own shorthand, for example 7N plus 7G 1 to 1 with 20 volume at the roots for 35 minutes, then 9V gloss on the ends, along with a free note for anything else: porosity, a scalp that reacts to lightener, the shade she hated in 2024.

Below the formula sits every visit she has made, with the service, the stylist and the date. Click her booking on the calendar and the card is one step away, so you read the formula while the client is still parking. When you change it, the card records who saved it last and when, which settles the question of whose formula this is in a salon with three colorists.

Formula field: Free text up to two thousand characters, written the way you mix.
Patch test date: The day of the last allergy alert test, so the desk can check it before a new client's first color.
Consent date: The day she signed your color or lightening consent form.
Full history: Every visit with service, stylist and date, including imported ones.

Color services that book for their real length

A stylist greeting a new client at the chair before her first appointment

A root touch-up is not a sixty minute slot, and a balayage with a toner is a whole afternoon. Each service carries its own minutes, the buffer you need to clean the bowl and the chair, and a processing gap where the color develops and you are free. The calendar can put a short service, such as a blow-dry or a men's cut, inside that gap, so processing time sells instead of sitting.

The booking page only offers start times where the whole service fits around what is already booked. A new client asking for a full blonde transformation still arrives as a request you approve, so you can book a consultation and a strand test first, and the patch test date on her card tells you whether she is ready.

Is there an app for hair color that also books clients?

Yes. Some salon booking software includes client records with a formula field, so the formula and the appointment sit in one place. Hairdressers.io works that way: the formula, patch test and consent dates are on the client card that opens from each booking. Stand-alone formula apps keep richer notes but do not take bookings.

If your current setup is a formula app plus a separate booking app, you can bring your existing clients across with the spreadsheet import on any paid plan, then paste each formula into its card the first time that client comes back. The salon client management software page walks through the card field by field.

Who owns the formulas when a colorist leaves?

In a salon account the client cards belong to the salon, because they sit in the salon's client list and the salon's export. A colorist who rents a chair and runs her own Chair plan owns her own list and her own formulas, and takes the spreadsheet with her whenever she wants. Decide which arrangement you are in before anyone writes the first formula.

That is a practical reason booth renters and suite colorists tend to keep their own account. The salon suite software page covers working alone from a private suite.

How much does a hair color formula app cost?

Stand-alone formula record apps are usually a small monthly subscription per colorist or per salon, manufacturer calculators are often free to professionals who buy the line, and dispensing systems are priced with hardware. Booking software with formula records costs a monthly subscription, and on many products that subscription grows with each stylist.

Here formulas come with booking on one flat bill: $49 a month for one chair or $288 a year, $89 a month for up to eight stylists, and $199 for up to 25 across several locations. No commission on any booking, including new clients from your city directory listing. All plans are on the pricing page.

What it does not do for a color business

It does not calculate a formula for you, store before and after photos, track tubes and developer in stock, or weigh color at the bar. It does not take card payments, so deposits for long color services are collected the way you take them today, and your deposit and cancellation policy goes out in every confirmation email. Reminders go by email two days ahead and on the morning, not by text.

If a photo gallery per client or a formula calculator matters more to you than booking, keep a formula app for that and use any booking tool you like. If the problem is that the formula and the appointment never meet, this is built to fix it.

How it works

Most colorists finish setup in one sitting.

1. Pick a plan: $49 a month for one chair, $89 for up to eight stylists. Sign in with a code sent to your email.
2. Build the color menu: Consultation, root touch-up, highlights, balayage and toner, each with its real length, processing gap and price.
3. Bring your clients: Import your list from a spreadsheet, then add each formula to the card.
4. Share your link: Instagram bio, texts and your city listing. Requests arrive by email with the client as the reply address.

Pricing

Flat monthly, from $49. Never a cut of a booking.

Four plans by team size, from a single chair to a multi-location group. The 0% commission line is the same on all of them, including bookings that come from your city directory listing.

See the plans

Questions

About hair color formula app

The rest are on the salon booking system FAQ.

What is the best app to keep hair color formulas?

If you already have booking software you like, a stand-alone formula record app gives the richest notes. If you want the formula to open from the appointment, choose booking software with a formula field on the client card. Hairdressers.io keeps formula, patch test and consent dates on each card for $49 a month for one chair.

Can the whole salon see a client's formula?

Yes. Client cards belong to the salon account. The owner and the team members you allow to edit notes can read and update the formula before the client sits down, and the card shows who saved it last and when.

Can I record patch tests for hair color?

Yes. Each client card has a patch test date and a consent date, so the desk can check that a new color client was tested before her appointment. The app records the dates; the test itself is done in the salon as usual.

Does it calculate hair color formulas?

No. It stores the formula you write, in your own shorthand. For a starting formula inside one color line, use the manufacturer's calculator and record what you actually mixed on the card.

Can I import formulas from another app?

You can import your client list and visit history from a spreadsheet on any paid plan. Formulas from another app are added to each card by hand, which most colorists do the next time the client books.

Does it book processing time correctly?

Yes. Each color service has its own length, buffer and processing gap, and the calendar can fit a shorter service inside the gap so development time is not wasted.

More salon software pages

Each one covers a different angle on the same product. The directory side lives on the salon directory.

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