Every client, every color formula, one tap away.
Formula Book is a hair color formula app for independent stylists and colorists. It keeps a card for each client — the formula from last time, the before and after photos, the allergy flag and patch test dates — on your phone, with backups you keep.
iPhone and Android · Works offline · No account
- 6/0Dark Blonde Natural30 g
- 6/73Dark Blonde Brown Gold10 g
- 8/0Light Blonde Natural10 g
- 6 %Developer · 20 vol · 1:150 g
Next time: go half a level lighter at the hairline.
What it keeps
The record of your color work, the way you already think about it
Built for stylists who rent a chair or a suite and keep their own book. Open a client and the last formula is there before the cape is fastened.
Client cards
Name, phone, tags and notes, with every visit underneath. Search by name, phone or tag; recent clients sit on top.
Formulas by the bowl
Brand, line, shade, grams, developer, ratio, timing and zone for each bowl. Big number keys you can hit with gloves on.
Or type it your way
When a form does not fit, write the bowl in your own words. It is shown exactly as you wrote it.
Repeat last visit
One tap copies the previous formula and services into today's visit. Change only what changed.
Before and after photos
Photos belong to the visit they were taken at, side by side, and can be shared as one image.
Allergies and patch tests
A red allergy flag on the list and the card, and a patch test history with date, product and result.
Saved formulas
Keep your go-to toners and root mixes as templates and drop them into any client's visit.
Bring your clients
Import from Contacts or a CSV file, with a preview of the columns before anything is saved.
PDF client card
A clean card with the client's history, ready to print or hand over when a client asks for their record.
At the chair
Two seconds to the last formula
Open the client
Type two letters or tap a recent name. The allergy flag and the note you left for next time are the first things you see.
Repeat, then adjust
Start from last time's bowls. Nudge the grams, swap a shade, change the timing.
Save with photos
Add the before and after, the price and a note for the next visit. Done before the next client sits down.
Shade catalog
687 shades across 11 professional lines
Pick a shade by its swatch instead of typing the code. Add your own shades for any other brand.
Your book stays yours
On your phone, backed up to files you keep
- Works offline. Everything is stored on your phone, so it works with no signal in the salon.
- No account. No sign-up, no login, nobody else holding your client book.
- Automatic daily backup keeps a fresh copy in your own iCloud on iPhone, or in a folder you choose on Android, next to backups you name yourself.
- Export everything as one file and restore it on a new phone — including from iPhone to Android and back.
- Face ID or fingerprint lock for the phone that sits on your trolley.
- Not a booking system. No calendar, no payments. It works alongside whatever you already use for appointments.
Questions
Before you download
Do I need an account to use Formula Book?
No. There is no sign-up and no login. You open the app and add your first client.
Does Formula Book work offline?
Yes. Client cards, formulas and photos are stored on your phone, so everything works with no signal in the salon.
Where are my client records kept, and how do I back them up?
Records are stored on your phone. Automatic daily backup keeps a fresh copy in your own iCloud on iPhone, or in a folder you choose on Android, next to backups you name yourself. You can also export everything as one file at any time and restore it later.
Can I move my client book from iPhone to Android, or the other way?
Yes. Export a backup file on one phone and restore it on the other. Clients, visits, formulas and photos come across.
Is Formula Book a booking or salon management system?
No. It has no calendar, no online booking and no payments. It keeps the record of your color work and sits alongside whatever you already use for appointments.
Which color lines are in the shade catalog?
687 shades across 11 lines: Wella Koleston Perfect, Color Touch, Illumina Color and Blondor; Redken Shades EQ Gloss and Color Gels Lacquers; L'Oréal Majirel, INOA and Dia Light; Schwarzkopf Igora Royal and Igora Vibrance. You can add your own shades for any other brand, or type a formula in your own words.
Can I record allergies and patch tests?
Yes. Each client card has an allergy flag with a note, and a patch test history with the date, the product and the result. The app shows when the last test is getting old.
Can I bring in my existing clients?
Yes. Import clients from your phone's Contacts, or from a CSV file with a preview of the columns before anything is saved.
Which phones and languages does Formula Book support?
iPhone with iOS 17 or later and Android phones with Android 8.0 or later. The app is available in English, German, Spanish, French, Italian, Japanese, Korean, Dutch, Portuguese (Brazil), Russian, Vietnamese, Simplified Chinese and Traditional Chinese.
- Made for
- Independent hairstylists, colorists, booth renters and salon suite owners
- Platforms
- iPhone (iOS 17 or later) · Android (8.0 or later)
- Languages
- 13, including English, Spanish, German, French, Portuguese and Japanese
- Category
- Business
- Developer
- Ho Van Dai
- Page updated