# Formula Log: Hair Color Notes — Salon client notes & backup

> Salon client notes & backup (iPhone/iPad app by yeonwoo lee.)

- Source: https://appshunter.io/ios/app/formula-log-hair-color-notes/id6789181898 (this page in markdown: same URL + `.md`)
- Developer: [yeonwoo lee](https://appshunter.io/developer/1893688320)
- Category: Business
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 2 MB
- Languages: American English
- Released: 2026-07-21
- Data updated: 2026-08-09
- User reviews in markdown: https://appshunter.io/ios/app/formula-log-hair-color-notes/id6789181898/reviews.md

## What is Formula Log?

Your client formulas deserve better than an index card box, or an app that logs you out and loses everything.

Formula Log is a private client and formula log for colorists. Everything lives on your phone. No account, no login, no server holding your work hostage.

DATA THAT STAYS YOURS
Formula, toner, processing time, price, and notes -- write it exactly how you'd write it on a card. Back up anytime and restore on a new phone without losing a thing.

EVERY CLIENT, A-Z
Search by name or formula. See each client's full visit history in one place.

BEFORE & AFTER
Attach a photo before you start and one when you're done. Drag to compare them side by side, right on the client's card.

TODAY'S CLIENTS
Open the app and see who's due back, what you earned this month, and your recent formulas.

NO SUBSCRIPTION
Pay once. Formula Log is yours forever -- no monthly charge, no renewal, no losing access if you stop paying.

Export your full client list and formulas to CSV or JSON, anytime. It's your data.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pay once | $9.99 | one-time |



## Version history (last 1 release)

### 1.0.0 — 2026-07-21

No release notes.

## More apps by yeonwoo lee

- [Hookd: Fishing Log & Fish ID](https://appshunter.io/ios/app/hookd-fishing-log-and-fish-id/id6762292616)
- [Tuck: Envelope Budget Planner](https://appshunter.io/ios/app/tuck-envelope-budget-planner/id6781833961)
- [BuildCalc: Material Calculator](https://appshunter.io/ios/app/buildcalc-material-calculator/id6787705001)

All apps by yeonwoo lee: https://appshunter.io/developer/1893688320

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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 2026-08-09.*