# True Proof vs FermCalc Winemaking Calculator

The clearest difference is price: FermCalc Winemaking Calculator at Free against True Proof's $9.99. FermCalc Winemaking Calculator also leads on rating (5.0 vs 4.0). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

FermCalc Winemaking Calculator is free to download; True Proof costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FermCalc Winemaking Calculator holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

## The numbers

| Metric | True Proof | FermCalc Winemaking Calculator |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/true-proof/id901015790/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/fermcalc-winemaking-calculator/id6470156850/reviews)** |
| Number of ratings | 4 | 4 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | Paid | **Free** |
| Size | 8 MB | 1 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Greg Miller](https://appshunter.io/developer/901015793) | [Stephen Gross](https://appshunter.io/developer/1713083160) |

## What reviewers say

### True Proof

[App page](https://appshunter.io/ios/app/true-proof/id901015790)

This app calculates the true proof of water-alcohol mixtures based on hydrometer readings and temperature. It also performs gauging calculations and dilutions, accounting for temperature-dependent mixing. Results can be logged, annotated, and emailed for record-keeping.

**Highlights:** True proof calculation, Gauging calculations, Dilution calculations, Temperature compensation, Log and email results, Multiple unit support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### FermCalc Winemaking Calculator

[App page](https://appshunter.io/ios/app/fermcalc-winemaking-calculator/id6470156850)

This app offers a comprehensive suite of advanced calculators for winemaking. It assists with unit conversions, adjustments for sugar, acidity, and sulfites, and estimations for alcohol content and blending. Designed for both beginners and professionals, it provides flexible input and output units for all calculations.

**Highlights:** Unit conversions (volume, mass, temperature, etc.), Chaptalization & dilution calculations, Acidity adjustment tools, Sulfite addition calculator, Alcohol & solids content estimation, Blending and fortification calculators, Miscellaneous winemaking additions

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is True Proof free?

True Proof costs $9.99, with no in-app purchases.

### Is FermCalc Winemaking Calculator free?

FermCalc Winemaking Calculator is free to download, with no in-app purchases.

### Which has better reviews, True Proof or FermCalc Winemaking Calculator?

FermCalc Winemaking Calculator is rated higher. True Proof averages 4.0 out of 5 from 4 ratings, while FermCalc Winemaking Calculator averages 5.0 from 4 ratings.

### Do True Proof or FermCalc Winemaking Calculator have ads?

Neither True Proof nor FermCalc Winemaking Calculator shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*