SoapDIY APP is a good helper of your handmade soap. This APP can save your recipes. The INS, NaOH, KOH, water, and cost will be automatically calculated and warning alerts can be turned on and off. , You can adjust the formula for calculating the amount of water for each handmade soap. Built-in database of rich oils and other additives, and can be modified or added on its own. There is also soap analysis, which allows you to know the handmade soap Foam, cleansing and moisturizing power. Use iOS's built-in sharing features to easily share handmade soap content with your friends.