# Formula Book: Hair Color Notes — Salon & stylist client cards

> Salon & stylist client cards (iPhone/iPad app by Ho Van Dai.)

- Source: https://appshunter.io/ios/app/formula-book-hair-color-notes/id6810034654 (this page in markdown: same URL + `.md`)
- Developer: [Ho Van Dai](https://appshunter.io/developer/1572981836)
- Category: Business, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 10 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, Korean, Brazilian Portuguese, Russian, Chinese (Simplified, China) and 3 more
- Released: 2026-09-13
- Data updated: 2026-10-12

## What is Formula Book?

Every client, every formula, one tap away while your gloves are still on.

Keep a card for each client: the color formula from last time, the before and after photos, the allergy flag and patch test dates, the price you charged, the note you left yourself for next visit. Saved on your phone. Backed up to files you own.

Built for independent stylists and colorists who rent a chair or a suite. No booking calendar, no marketplace, no monthly fee for features you already have elsewhere. Just the record of your work, findable in two seconds when a client sits down.

WHAT'S INSIDE
• Client cards with name, phone, tags, allergy flag and patch test history, and every visit underneath
• Formulas written the way you mix them, bowl by bowl: brand, shade, grams, developer, ratio, timing, zone. Or type a bowl free-hand when a form does not fit
• Shade catalog for the major professional color lines, built in. Add your own shades
• Before and after photos on every visit, side by side
• Repeat last visit: copy the previous formula and services, then change only what changed
• Saved formulas: your go-to toners and root mixes, ready for any client
• Bring clients over from Contacts or a CSV file
• Before and after photos as one shareable image
• Face ID lock

BACKUPS YOU KEEP
Automatic snapshots go to your own iCloud Drive. Export everything as one file whenever you like, and restore it on a new iPhone. Backup, export and import are never behind a paywall.

WORKS OFFLINE
No account, no server, no one else holding your book. Everything stays on your phone.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Formula Book Premium Yearly | $9.99 | per year |
| Formula Book Premium Monthly | $0.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Formula Book Premium | $34.99 | one-time |


## Is Formula Book safe?

Not enough ratings yet to assess Formula Book.

## Is Formula Book legit?

Formula Book: Hair Color Notes appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Formula Book is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.4.2 — 2026-10-11

Bug fixes and stability improvements.

### 1.4.1 — 2026-10-10

Bug fixes and stability improvements.

### 1.4.0 — 2026-10-02

Bug fixes and reliability improvements.

### 1.3.0 — 2026-09-27

Interface refinements and small bug fixes.

### 1.2.0 — 2026-09-17

Interface tweaks and small bug fixes.

## Apps similar to Formula Book

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [StrandNotes: Hair Formulas](https://appshunter.io/ios/app/strandnotes-hair-formulas/id6785344196) | — | Free | Business |
| [HueBook: Hair Color Formulas](https://appshunter.io/ios/app/huebook-hair-color-formulas/id6780090899) | — | Free | Business |
| [Salon Client Notes - SalonCue](https://appshunter.io/ios/app/salon-client-notes-saloncue/id6779940506) | — | Free | Business |
| [Glamorph: Client Management](https://appshunter.io/ios/app/glamorph-client-management/id6757088463) | 5.0 (2) | Free | Business |
| [HairNow: Find a Stylist Now](https://appshunter.io/ios/app/hairnow-find-a-stylist-now/id6761238190) | 4.5 (16) | Free | Business |

## More apps by Ho Van Dai

- [Line 98 Classic: Amazing Ball](https://appshunter.io/ios/app/line-98-classic-amazing-ball/id6787416787)
- [Memento: Anniversary Tracker](https://appshunter.io/ios/app/memento-anniversary-tracker/id6787834446)
- [Moodee: Mood Tracker](https://appshunter.io/ios/app/moodee-mood-tracker/id6788285478)
- [Shelflife: Book Journal](https://appshunter.io/ios/app/shelflife-book-journal/id6790657863)
- [Plant Journal: Grow Diary](https://appshunter.io/ios/app/plant-journal-grow-diary/id6791094256)
- [Ouch Log: Pain Tracker & Diary](https://appshunter.io/ios/app/ouch-log-pain-tracker-and-diary/id6792059742)

All apps by Ho Van Dai: https://appshunter.io/developer/1572981836

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-12.*