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Thank you for your thoughtful and constructive feedback.

Greetings all. FermCalc for iOS devices is now available in the Apple App store. You can contact me through the FermCalc feedback page if you have any issues or suggestions.

As Johnd points out, the JavaScript version will run fine on iOS. Just go to www.fermcalc.com and click on the link for the JavaScript Calculator and it will run in your browser. It has the exact same functionality as the Android version. (The Android version really just runs the JavaScript...

That's good to know, Rampage4all. Thanks. BTW, the app is also available now in the Amazon app store in case there are any Fire tablet or phone users out there.

WVMJ, The answer to both your questions is yes. The Chaptalization & Dilution calculator lets you choose Honey as the sweetener and will calculate how much to add to achieve a target SG. The Acidity Adjustment calculator has malic acid as one of the acid choices, and you can input/output...

Thanks everyone for the feedback. I've made some tweaks and the initial release is now available in the Google Play store. It's free of charge and free of ads.

I'm in the process of developing an Android-friendly version of FermCalc. You can download a test version of the apk file here. I'll eventually post it on Google Play, but before then I'd like to get feedback on it from other users since I've only tested it on my Android tablet and on some...

Jack Keller's website has a nice compilation of additive volume/weight conversions here. It shows grape tannin as being 2.8 g per teaspoon. I agree that it's best to add it in small increments until you achieve the desired taste.

I think the 1.100 SG is possible with 4 cans of concentrate and 80 oz water. As Bissrok points out the sugar content of Welch's concentrate varies from batch to batch. I've made wine from Welch's several times, and my measurements of the sugar content range from 55 to 60 Brix. You can use the...

Greetings fellow winemakers. I recently made a number of enhancements to FermCalc, including the addition of two new fortification calculators. You can read about the new features here. Feel free to use the feedback page to report any issues, to request new features, or to ask any questions...