Hair Color Formula Diary

Hair Color Formula Diary is a private formula book for stylists and colorists. Everything is stored on your phone. There is no account and the app has no internet access. What you can do - Keep a client list using first names or initials only. - Save each formula: brand and shade lines with grams or ounces, developer volume, color-to-developer ratio, processing time, date and notes. - See the developer amount and the total mix worked out from your ratio. Type ratios like 1:1.5. Decimals can use a dot or a comma. - Scale a formula up or down to a new total in one tap. - Duplicate a past formula for the next visit. - Switch between grams and ounces. - Use the quick mix calculator without saving anything. - Share a formula as plain text. Privacy - No ads, no accounts, no tracking. Please keep client data minimal: a first name or initial is enough. Do not store phone numbers or photos of faces. Please note - This app is a record-keeping and calculation tool. Amounts are estimates for your own notes. It does not recommend products, developer strengths or processing times, and it does not give safety or patch-test advice. Always follow the product maker's instructions.

New look. Optional Plus for unlimited clients, and two optional one-time add-ons: Colorist toolkit and Client formula card. Fixes and improvements.