# Smith Charts vs Grindcalculator

The clearest difference is rating: Smith Charts at 3.7 against Grindcalculator's 1.0. Smith Charts also leads on price ($3.99 vs $6.99) and ratings volume (3 vs 1). Grindcalculator's advantage is update cadence (every 4 days vs every 3 weeks) and review sentiment (85% vs 67%). On ads, in-app purchases, monetization model and device support there is nothing between them.

Smith Charts costs $3.99 and Grindcalculator $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Smith Charts holds the better App Store score, 3.7 against 1.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews complicate that: 67% of Smith Charts's written reviews are positive against 85% of Grindcalculator's, so the app with the better star average is not the one people write more warmly about.

Smith Charts ships an update every 3 weeks, Grindcalculator every 4 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Smith Charts | Grindcalculator |
| --- | --- | --- |
| Price | **$3.99** | $6.99 |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/smith-charts/id1602503719/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/grindcalculator/id1660469778/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 66.7% of reviews | **84.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Paid | Paid |
| Size | 24 MB | 9 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Edoardo Orzes](https://appshunter.io/developer/1665361246) | [RoWo UG](https://appshunter.io/developer/1660469780) |

## What reviewers say

### Smith Charts

[App page](https://appshunter.io/ios/app/smith-charts/id1602503719)

Design matching networks, analyze device parameters, and compute stability circles with this interactive tool. Supports S parameters, various components, and offers advanced engineering features for RF design. Available in dark mode and exportable to PDF.

**Highlights:** Interactive Smith chart with drag and zoom, Design matching networks with various components, Compute stability, equi gain, and noise circles, Import S parameters from Touchstone files, Export designs to PDF, image, or file, Dark mode support, Ruler for wavelength measurement

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

**In-app purchases:** none


### Grindcalculator

[App page](https://appshunter.io/ios/app/grindcalculator/id1660469778)

This tool simplifies knife sharpening by calculating the correct angle, eliminating the need for manual marking. Save custom sharpening angles and grinding wheel dimensions for consistent results across various brands and types of sharpening tools.

**Highlights:** Precise angle calculation, Eliminates manual marking, Save custom angles, Save grinding wheel dimensions, Supports all grinder brands, Offline functionality

**In-app purchases:** none


## Frequently asked questions

### Is Smith Charts free?

Smith Charts costs $3.99, with no in-app purchases.

### Is Grindcalculator free?

Grindcalculator costs $6.99, with no in-app purchases.

### Which has better reviews, Smith Charts or Grindcalculator?

Smith Charts is rated higher. Smith Charts averages 3.7 out of 5 from 3 ratings, while Grindcalculator averages 1.0 from 1 ratings.

### Do Smith Charts or Grindcalculator have ads?

Neither Smith Charts nor Grindcalculator shows ads.

### Which is updated more often, Smith Charts or Grindcalculator?

Smith Charts ships an update every 3 weeks, and Grindcalculator every 4 days. Most recently, Smith Charts was updated on October 24, 2026 and Grindcalculator on October 24, 2026.

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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.*